[PATCH 000/117] media: Convert to platform remove callback returning void

[PATCH 000/117] media: Convert to platform remove callback returning void

[Uwe Kleine-König]

Hello,

this series adapts the platform drivers below drivers/pci to use the
.remove_new() callback. Compared to the traditional .remove() callback
.remove_new() returns no value. This is a good thing because the driver core
doesn't (and cannot) cope for errors during remove. The only effect of a
non-zero return value in .remove() is that the driver core emits a warning. The
device is removed anyhow and an early return from .remove() usually yields a
resource leak.

By changing the remove callback to return void driver authors cannot
reasonably assume any more that there is some kind of cleanup later.

Only three drivers needed some preparation first to make sure they
return 0 unconditionally in their remove callback. Then all drivers
could be trivially converted without side effects to .remove_new().

The changes to the individual drivers are all orthogonal. If I need to
resend some patches because of some review feedback, I'd like to only
send the patches that actually needed changes, so please pick up the
remaining patches that don't need changing to reduce the amount of mail.

Best regards
Uwe

Uwe Kleine-König (117):
  media: cec-gpio: Convert to platform remove callback returning void
  media: cros-ec-cec: Don't exit early in .remove() callback
  media: cros-ec-cec: Convert to platform remove callback returning void
  media: ao-cec-g12a: Convert to platform remove callback returning void
  media: ao-cec: Convert to platform remove callback returning void
  media: s5p_cec: Convert to platform remove callback returning void
  media: seco-cec: Convert to platform remove callback returning void
  media: stih-cec: Convert to platform remove callback returning void
  media: stm32-cec: Convert to platform remove callback returning void
  media: tegra_cec: Convert to platform remove callback returning void
  media: rtl2832_sdr: Convert to platform remove callback returning void
  media: zd1301_demod: Convert to platform remove callback returning
    void
  media: allegro-core: Convert to platform remove callback returning
    void
  media: ge2d: Convert to platform remove callback returning void
  media: vpu_core: Convert to platform remove callback returning void
  media: vpu_drv: Convert to platform remove callback returning void
  media: aspeed-video: Convert to platform remove callback returning
    void
  media: atmel-isi: Convert to platform remove callback returning void
  media: cdns-csi2rx: Convert to platform remove callback returning void
  media: cdns-csi2tx: Convert to platform remove callback returning void
  media: coda-common: Convert to platform remove callback returning void
  media: pxa_camera: Convert to platform remove callback returning void
  media: m2m-deinterlace: Convert to platform remove callback returning
    void
  media: marvell: Simplify remove callback
  media: marvell: Convert to platform remove callback returning void
  media: mtk_jpeg_core: Convert to platform remove callback returning
    void
  media: mtk_mdp_core: Convert to platform remove callback returning
    void
  media: mtk-mdp3-core: Convert to platform remove callback returning
    void
  media: mtk_vcodec_dec_drv: Convert to platform remove callback
    returning void
  media: mtk_vcodec_enc_drv: Convert to platform remove callback
    returning void
  media: mtk_vpu: Convert to platform remove callback returning void
  media: microchip-csi2dc: Convert to platform remove callback returning
    void
  media: microchip-sama5d2-isc: Convert to platform remove callback
    returning void
  media: microchip-sama7g5-isc: Convert to platform remove callback
    returning void
  media: vde: Convert to platform remove callback returning void
  media: dw100: Convert to platform remove callback returning void
  media: mxc-jpeg: Convert to platform remove callback returning void
  media: imx-mipi-csis: Convert to platform remove callback returning
    void
  media: imx-pxp: Convert to platform remove callback returning void
  media: imx7-media-csi: Convert to platform remove callback returning
    void
  media: mx2_emmaprp: Convert to platform remove callback returning void
  media: camss: Convert to platform remove callback returning void
  media: venus: Warn only once about problems in .remove()
  media: venus: Convert to platform remove callback returning void
  media: vdec: Convert to platform remove callback returning void
  media: venc: Convert to platform remove callback returning void
  media: rcar-fcp: Convert to platform remove callback returning void
  media: rcar-isp: Convert to platform remove callback returning void
  media: rcar-core: Convert to platform remove callback returning void
  media: rcar-csi2: Convert to platform remove callback returning void
  media: rcar_drif: Convert to platform remove callback returning void
  media: rcar_fdp1: Convert to platform remove callback returning void
  media: rcar_jpu: Convert to platform remove callback returning void
  media: renesas-ceu: Convert to platform remove callback returning void
  media: rzg2l-core: Convert to platform remove callback returning void
  media: rzg2l-csi2: Convert to platform remove callback returning void
  media: sh_vou: Convert to platform remove callback returning void
  media: vsp1_drv: Convert to platform remove callback returning void
  media: rga: Convert to platform remove callback returning void
  media: rkisp1-dev: Convert to platform remove callback returning void
  media: gsc-core: Convert to platform remove callback returning void
  media: fimc-core: Convert to platform remove callback returning void
  media: fimc-is-i2c: Convert to platform remove callback returning void
  media: fimc-is: Convert to platform remove callback returning void
  media: fimc-lite: Convert to platform remove callback returning void
  media: media-dev: Convert to platform remove callback returning void
  media: mipi-csis: Convert to platform remove callback returning void
  media: camif-core: Convert to platform remove callback returning void
  media: g2d: Convert to platform remove callback returning void
  media: jpeg-core: Convert to platform remove callback returning void
  media: s5p_mfc: Convert to platform remove callback returning void
  media: bdisp-v4l2: Convert to platform remove callback returning void
  media: c8sectpfe-core: Convert to platform remove callback returning
    void
  media: delta-v4l2: Convert to platform remove callback returning void
  media: hva-v4l2: Convert to platform remove callback returning void
  media: dma2d: Convert to platform remove callback returning void
  media: stm32-dcmi: Convert to platform remove callback returning void
  media: sun4i_csi: Convert to platform remove callback returning void
  media: sun6i_csi: Convert to platform remove callback returning void
  media: sun6i_mipi_csi2: Convert to platform remove callback returning
    void
  media: sun8i_a83t_mipi_csi2: Convert to platform remove callback
    returning void
  media: sun8i-di: Convert to platform remove callback returning void
  media: sun8i_rotate: Convert to platform remove callback returning
    void
  media: am437x-vpfe: Convert to platform remove callback returning void
  media: cal: Convert to platform remove callback returning void
  media: vpif: Convert to platform remove callback returning void
  media: vpif_capture: Convert to platform remove callback returning
    void
  media: vpif_display: Convert to platform remove callback returning
    void
  media: omap_vout: Convert to platform remove callback returning void
  media: isp: Convert to platform remove callback returning void
  media: vpe: Convert to platform remove callback returning void
  media: hantro_drv: Convert to platform remove callback returning void
  media: via-camera: Convert to platform remove callback returning void
  media: video-mux: Convert to platform remove callback returning void
  media: xilinx-csi2rxss: Convert to platform remove callback returning
    void
  media: xilinx-tpg: Convert to platform remove callback returning void
  media: xilinx-vipp: Convert to platform remove callback returning void
  media: xilinx-vtc: Convert to platform remove callback returning void
  media: radio-si476x: Convert to platform remove callback returning
    void
  media: radio-timb: Convert to platform remove callback returning void
  media: radio-wl1273: Convert to platform remove callback returning
    void
  media: radio-platform-si4713: Convert to platform remove callback
    returning void
  media: gpio-ir-recv: Convert to platform remove callback returning
    void
  media: img-ir-core: Convert to platform remove callback returning void
  media: ir-hix5hd2: Convert to platform remove callback returning void
  media: meson-ir-tx: Convert to platform remove callback returning void
  media: meson-ir: Convert to platform remove callback returning void
  media: mtk-cir: Convert to platform remove callback returning void
  media: st_rc: Convert to platform remove callback returning void
  media: sunxi-cir: Convert to platform remove callback returning void
  media: vicodec-core: Convert to platform remove callback returning
    void
  media: vidtv_bridge: Convert to platform remove callback returning
    void
  media: vim2m: Convert to platform remove callback returning void
  media: vimc-core: Convert to platform remove callback returning void
  media: visl-core: Convert to platform remove callback returning void
  media: vivid-core: Convert to platform remove callback returning void
  media: it913x: Convert to platform remove callback returning void

 drivers/media/cec/platform/cec-gpio/cec-gpio.c   |  5 ++---
 drivers/media/cec/platform/cros-ec/cros-ec-cec.c | 16 ++++++++--------
 drivers/media/cec/platform/meson/ao-cec-g12a.c   |  6 ++----
 drivers/media/cec/platform/meson/ao-cec.c        |  6 ++----
 drivers/media/cec/platform/s5p/s5p_cec.c         |  5 ++---
 drivers/media/cec/platform/seco/seco-cec.c       |  6 ++----
 drivers/media/cec/platform/sti/stih-cec.c        |  6 ++----
 drivers/media/cec/platform/stm32/stm32-cec.c     |  6 ++----
 drivers/media/cec/platform/tegra/tegra_cec.c     |  6 ++----
 drivers/media/dvb-frontends/rtl2832_sdr.c        |  6 ++----
 drivers/media/dvb-frontends/zd1301_demod.c       |  6 ++----
 .../media/platform/allegro-dvt/allegro-core.c    |  6 ++----
 drivers/media/platform/amlogic/meson-ge2d/ge2d.c |  6 ++----
 drivers/media/platform/amphion/vpu_core.c        |  6 ++----
 drivers/media/platform/amphion/vpu_drv.c         |  6 ++----
 drivers/media/platform/aspeed/aspeed-video.c     |  6 ++----
 drivers/media/platform/atmel/atmel-isi.c         |  6 ++----
 drivers/media/platform/cadence/cdns-csi2rx.c     |  6 ++----
 drivers/media/platform/cadence/cdns-csi2tx.c     |  6 ++----
 drivers/media/platform/chips-media/coda-common.c |  5 ++---
 drivers/media/platform/intel/pxa_camera.c        |  6 ++----
 drivers/media/platform/m2m-deinterlace.c         |  6 ++----
 drivers/media/platform/marvell/mmp-driver.c      | 16 +++-------------
 .../media/platform/mediatek/jpeg/mtk_jpeg_core.c |  6 ++----
 .../media/platform/mediatek/mdp/mtk_mdp_core.c   |  5 ++---
 .../media/platform/mediatek/mdp3/mtk-mdp3-core.c |  5 ++---
 .../mediatek/vcodec/mtk_vcodec_dec_drv.c         |  5 ++---
 .../mediatek/vcodec/mtk_vcodec_enc_drv.c         |  5 ++---
 drivers/media/platform/mediatek/vpu/mtk_vpu.c    |  6 ++----
 .../media/platform/microchip/microchip-csi2dc.c  |  6 ++----
 .../platform/microchip/microchip-sama5d2-isc.c   |  6 ++----
 .../platform/microchip/microchip-sama7g5-isc.c   |  6 ++----
 drivers/media/platform/nvidia/tegra-vde/vde.c    |  6 ++----
 drivers/media/platform/nxp/dw100/dw100.c         |  6 ++----
 drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c   |  6 ++----
 drivers/media/platform/nxp/imx-mipi-csis.c       |  6 ++----
 drivers/media/platform/nxp/imx-pxp.c             |  6 ++----
 drivers/media/platform/nxp/imx7-media-csi.c      |  6 ++----
 drivers/media/platform/nxp/mx2_emmaprp.c         |  6 ++----
 drivers/media/platform/qcom/camss/camss.c        |  6 ++----
 drivers/media/platform/qcom/venus/core.c         |  6 ++----
 drivers/media/platform/qcom/venus/vdec.c         |  6 ++----
 drivers/media/platform/qcom/venus/venc.c         |  6 ++----
 drivers/media/platform/renesas/rcar-fcp.c        |  6 ++----
 drivers/media/platform/renesas/rcar-isp.c        |  6 ++----
 .../media/platform/renesas/rcar-vin/rcar-core.c  |  6 ++----
 .../media/platform/renesas/rcar-vin/rcar-csi2.c  |  6 ++----
 drivers/media/platform/renesas/rcar_drif.c       |  8 +++-----
 drivers/media/platform/renesas/rcar_fdp1.c       |  6 ++----
 drivers/media/platform/renesas/rcar_jpu.c        |  6 ++----
 drivers/media/platform/renesas/renesas-ceu.c     |  6 ++----
 .../platform/renesas/rzg2l-cru/rzg2l-core.c      |  6 ++----
 .../platform/renesas/rzg2l-cru/rzg2l-csi2.c      |  6 ++----
 drivers/media/platform/renesas/sh_vou.c          |  5 ++---
 drivers/media/platform/renesas/vsp1/vsp1_drv.c   |  6 ++----
 drivers/media/platform/rockchip/rga/rga.c        |  6 ++----
 .../media/platform/rockchip/rkisp1/rkisp1-dev.c  |  6 ++----
 .../media/platform/samsung/exynos-gsc/gsc-core.c |  5 ++---
 .../platform/samsung/exynos4-is/fimc-core.c      |  5 ++---
 .../platform/samsung/exynos4-is/fimc-is-i2c.c    |  6 ++----
 .../media/platform/samsung/exynos4-is/fimc-is.c  |  6 ++----
 .../platform/samsung/exynos4-is/fimc-lite.c      |  5 ++---
 .../platform/samsung/exynos4-is/media-dev.c      |  8 +++-----
 .../platform/samsung/exynos4-is/mipi-csis.c      |  6 ++----
 .../platform/samsung/s3c-camif/camif-core.c      |  6 ++----
 drivers/media/platform/samsung/s5p-g2d/g2d.c     |  5 ++---
 .../media/platform/samsung/s5p-jpeg/jpeg-core.c  |  6 ++----
 drivers/media/platform/samsung/s5p-mfc/s5p_mfc.c |  5 ++---
 drivers/media/platform/st/sti/bdisp/bdisp-v4l2.c |  6 ++----
 .../platform/st/sti/c8sectpfe/c8sectpfe-core.c   |  6 ++----
 drivers/media/platform/st/sti/delta/delta-v4l2.c |  6 ++----
 drivers/media/platform/st/sti/hva/hva-v4l2.c     |  6 ++----
 drivers/media/platform/st/stm32/dma2d/dma2d.c    |  6 ++----
 drivers/media/platform/st/stm32/stm32-dcmi.c     |  6 ++----
 .../media/platform/sunxi/sun4i-csi/sun4i_csi.c   |  6 ++----
 .../media/platform/sunxi/sun6i-csi/sun6i_csi.c   |  6 ++----
 .../sunxi/sun6i-mipi-csi2/sun6i_mipi_csi2.c      |  6 ++----
 .../sun8i-a83t-mipi-csi2/sun8i_a83t_mipi_csi2.c  |  6 ++----
 drivers/media/platform/sunxi/sun8i-di/sun8i-di.c |  6 ++----
 .../platform/sunxi/sun8i-rotate/sun8i_rotate.c   |  6 ++----
 drivers/media/platform/ti/am437x/am437x-vpfe.c   |  6 ++----
 drivers/media/platform/ti/cal/cal.c              |  6 ++----
 drivers/media/platform/ti/davinci/vpif.c         |  6 ++----
 drivers/media/platform/ti/davinci/vpif_capture.c |  5 ++---
 drivers/media/platform/ti/davinci/vpif_display.c |  6 ++----
 drivers/media/platform/ti/omap/omap_vout.c       |  5 ++---
 drivers/media/platform/ti/omap3isp/isp.c         |  6 ++----
 drivers/media/platform/ti/vpe/vpe.c              |  6 ++----
 drivers/media/platform/verisilicon/hantro_drv.c  |  5 ++---
 drivers/media/platform/via/via-camera.c          |  5 ++---
 drivers/media/platform/video-mux.c               |  6 ++----
 drivers/media/platform/xilinx/xilinx-csi2rxss.c  |  6 ++----
 drivers/media/platform/xilinx/xilinx-tpg.c       |  6 ++----
 drivers/media/platform/xilinx/xilinx-vipp.c      |  6 ++----
 drivers/media/platform/xilinx/xilinx-vtc.c       |  6 ++----
 drivers/media/radio/radio-si476x.c               |  6 ++----
 drivers/media/radio/radio-timb.c                 |  5 ++---
 drivers/media/radio/radio-wl1273.c               |  6 ++----
 .../media/radio/si4713/radio-platform-si4713.c   |  6 ++----
 drivers/media/rc/gpio-ir-recv.c                  |  6 ++----
 drivers/media/rc/img-ir/img-ir-core.c            |  5 ++---
 drivers/media/rc/ir-hix5hd2.c                    |  5 ++---
 drivers/media/rc/meson-ir-tx.c                   |  6 ++----
 drivers/media/rc/meson-ir.c                      |  6 ++----
 drivers/media/rc/mtk-cir.c                       |  6 ++----
 drivers/media/rc/st_rc.c                         |  5 ++---
 drivers/media/rc/sunxi-cir.c                     |  6 ++----
 .../media/test-drivers/vicodec/vicodec-core.c    |  6 ++----
 drivers/media/test-drivers/vidtv/vidtv_bridge.c  |  6 ++----
 drivers/media/test-drivers/vim2m.c               |  6 ++----
 drivers/media/test-drivers/vimc/vimc-core.c      |  6 ++----
 drivers/media/test-drivers/visl/visl-core.c      |  6 ++----
 drivers/media/test-drivers/vivid/vivid-core.c    |  5 ++---
 drivers/media/tuners/it913x.c                    |  6 ++----
 114 files changed, 237 insertions(+), 449 deletions(-)

base-commit: fe15c26ee26efa11741a7b632e9f23b01aca4cc6
-- 
2.39.2


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[PATCH 004/117] media: ao-cec-g12a: Convert to platform remove callback returning void

[Uwe Kleine-König]

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
 drivers/media/cec/platform/meson/ao-cec-g12a.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/media/cec/platform/meson/ao-cec-g12a.c b/drivers/media/cec/platform/meson/ao-cec-g12a.c
index 68fe6d6a8178..51294b9b6cd5 100644
--- a/drivers/media/cec/platform/meson/ao-cec-g12a.c
+++ b/drivers/media/cec/platform/meson/ao-cec-g12a.c
@@ -744,7 +744,7 @@ static int meson_ao_cec_g12a_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int meson_ao_cec_g12a_remove(struct platform_device *pdev)
+static void meson_ao_cec_g12a_remove(struct platform_device *pdev)
 {
 	struct meson_ao_cec_g12a_device *ao_cec = platform_get_drvdata(pdev);
 
@@ -753,8 +753,6 @@ static int meson_ao_cec_g12a_remove(struct platform_device *pdev)
 	cec_notifier_cec_adap_unregister(ao_cec->notify, ao_cec->adap);
 
 	cec_unregister_adapter(ao_cec->adap);
-
-	return 0;
 }
 
 static const struct meson_ao_cec_g12a_data ao_cec_g12a_data = {
@@ -780,7 +778,7 @@ MODULE_DEVICE_TABLE(of, meson_ao_cec_g12a_of_match);
 
 static struct platform_driver meson_ao_cec_g12a_driver = {
 	.probe   = meson_ao_cec_g12a_probe,
-	.remove  = meson_ao_cec_g12a_remove,
+	.remove_new = meson_ao_cec_g12a_remove,
 	.driver  = {
 		.name = "meson-ao-cec-g12a",
 		.of_match_table = of_match_ptr(meson_ao_cec_g12a_of_match),
-- 
2.39.2


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Re: [PATCH 004/117] media: ao-cec-g12a: Convert to platform remove callback returning void

[Martin Blumenstingl]

On Sun, Mar 26, 2023 at 4:32 PM Uwe Kleine-König
<u.kleine-koenig@pengutronix.de> wrote:
>
> The .remove() callback for a platform driver returns an int which makes
> many driver authors wrongly assume it's possible to do error handling by
> returning an error code. However the value returned is (mostly) ignored
> and this typically results in resource leaks. To improve here there is a
> quest to make the remove callback return void. In the first step of this
> quest all drivers are converted to .remove_new() which already returns
> void.
>
> Trivially convert this driver from always returning zero in the remove
> callback to the void returning variant.
>
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>

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[PATCH 005/117] media: ao-cec: Convert to platform remove callback returning void

[Uwe Kleine-König]

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
 drivers/media/cec/platform/meson/ao-cec.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/media/cec/platform/meson/ao-cec.c b/drivers/media/cec/platform/meson/ao-cec.c
index 6b440f0635d9..f6f51a34f7bd 100644
--- a/drivers/media/cec/platform/meson/ao-cec.c
+++ b/drivers/media/cec/platform/meson/ao-cec.c
@@ -696,7 +696,7 @@ static int meson_ao_cec_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int meson_ao_cec_remove(struct platform_device *pdev)
+static void meson_ao_cec_remove(struct platform_device *pdev)
 {
 	struct meson_ao_cec_device *ao_cec = platform_get_drvdata(pdev);
 
@@ -704,8 +704,6 @@ static int meson_ao_cec_remove(struct platform_device *pdev)
 
 	cec_notifier_cec_adap_unregister(ao_cec->notify, ao_cec->adap);
 	cec_unregister_adapter(ao_cec->adap);
-
-	return 0;
 }
 
 static const struct of_device_id meson_ao_cec_of_match[] = {
@@ -716,7 +714,7 @@ MODULE_DEVICE_TABLE(of, meson_ao_cec_of_match);
 
 static struct platform_driver meson_ao_cec_driver = {
 	.probe   = meson_ao_cec_probe,
-	.remove  = meson_ao_cec_remove,
+	.remove_new = meson_ao_cec_remove,
 	.driver  = {
 		.name = "meson-ao-cec",
 		.of_match_table = of_match_ptr(meson_ao_cec_of_match),
-- 
2.39.2


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Re: [PATCH 005/117] media: ao-cec: Convert to platform remove callback returning void

[Martin Blumenstingl]

On Sun, Mar 26, 2023 at 4:32 PM Uwe Kleine-König
<u.kleine-koenig@pengutronix.de> wrote:
>
> The .remove() callback for a platform driver returns an int which makes
> many driver authors wrongly assume it's possible to do error handling by
> returning an error code. However the value returned is (mostly) ignored
> and this typically results in resource leaks. To improve here there is a
> quest to make the remove callback return void. In the first step of this
> quest all drivers are converted to .remove_new() which already returns
> void.
>
> Trivially convert this driver from always returning zero in the remove
> callback to the void returning variant.
>
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>

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[PATCH 014/117] media: ge2d: Convert to platform remove callback returning void

[Uwe Kleine-König]

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
 drivers/media/platform/amlogic/meson-ge2d/ge2d.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/media/platform/amlogic/meson-ge2d/ge2d.c b/drivers/media/platform/amlogic/meson-ge2d/ge2d.c
index 142d421a8d76..09409908ba5d 100644
--- a/drivers/media/platform/amlogic/meson-ge2d/ge2d.c
+++ b/drivers/media/platform/amlogic/meson-ge2d/ge2d.c
@@ -1024,7 +1024,7 @@ static int ge2d_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int ge2d_remove(struct platform_device *pdev)
+static void ge2d_remove(struct platform_device *pdev)
 {
 	struct meson_ge2d *ge2d = platform_get_drvdata(pdev);
 
@@ -1032,8 +1032,6 @@ static int ge2d_remove(struct platform_device *pdev)
 	v4l2_m2m_release(ge2d->m2m_dev);
 	v4l2_device_unregister(&ge2d->v4l2_dev);
 	clk_disable_unprepare(ge2d->clk);
-
-	return 0;
 }
 
 static const struct of_device_id meson_ge2d_match[] = {
@@ -1047,7 +1045,7 @@ MODULE_DEVICE_TABLE(of, meson_ge2d_match);
 
 static struct platform_driver ge2d_drv = {
 	.probe = ge2d_probe,
-	.remove = ge2d_remove,
+	.remove_new = ge2d_remove,
 	.driver = {
 		.name = "meson-ge2d",
 		.of_match_table = meson_ge2d_match,
-- 
2.39.2


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Re: [PATCH 014/117] media: ge2d: Convert to platform remove callback returning void

[Martin Blumenstingl]

On Sun, Mar 26, 2023 at 4:32 PM Uwe Kleine-König
<u.kleine-koenig@pengutronix.de> wrote:
>
> The .remove() callback for a platform driver returns an int which makes
> many driver authors wrongly assume it's possible to do error handling by
> returning an error code. However the value returned is (mostly) ignored
> and this typically results in resource leaks. To improve here there is a
> quest to make the remove callback return void. In the first step of this
> quest all drivers are converted to .remove_new() which already returns
> void.
>
> Trivially convert this driver from always returning zero in the remove
> callback to the void returning variant.
>
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>

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[PATCH 106/117] media: meson-ir-tx: Convert to platform remove callback returning void

[Uwe Kleine-König]

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
 drivers/media/rc/meson-ir-tx.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/media/rc/meson-ir-tx.c b/drivers/media/rc/meson-ir-tx.c
index abdb62b16e98..6355b79893fb 100644
--- a/drivers/media/rc/meson-ir-tx.c
+++ b/drivers/media/rc/meson-ir-tx.c
@@ -372,13 +372,11 @@ static int __init meson_irtx_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int meson_irtx_remove(struct platform_device *pdev)
+static void meson_irtx_remove(struct platform_device *pdev)
 {
 	struct rc_dev *rc = platform_get_drvdata(pdev);
 
 	rc_unregister_device(rc);
-
-	return 0;
 }
 
 static const struct of_device_id meson_irtx_dt_match[] = {
@@ -390,7 +388,7 @@ static const struct of_device_id meson_irtx_dt_match[] = {
 MODULE_DEVICE_TABLE(of, meson_irtx_dt_match);
 
 static struct platform_driver meson_irtx_pd = {
-	.remove = meson_irtx_remove,
+	.remove_new = meson_irtx_remove,
 	.driver = {
 		.name = DRIVER_NAME,
 		.of_match_table = meson_irtx_dt_match,
-- 
2.39.2


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Re: [PATCH 106/117] media: meson-ir-tx: Convert to platform remove callback returning void

[Martin Blumenstingl]

On Sun, Mar 26, 2023 at 4:32 PM Uwe Kleine-König
<u.kleine-koenig@pengutronix.de> wrote:
>
> The .remove() callback for a platform driver returns an int which makes
> many driver authors wrongly assume it's possible to do error handling by
> returning an error code. However the value returned is (mostly) ignored
> and this typically results in resource leaks. To improve here there is a
> quest to make the remove callback return void. In the first step of this
> quest all drivers are converted to .remove_new() which already returns
> void.
>
> Trivially convert this driver from always returning zero in the remove
> callback to the void returning variant.
>
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>

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[PATCH 107/117] media: meson-ir: Convert to platform remove callback returning void

[Uwe Kleine-König]

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
 drivers/media/rc/meson-ir.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/media/rc/meson-ir.c b/drivers/media/rc/meson-ir.c
index 4b769111f78e..49aa309d1a8c 100644
--- a/drivers/media/rc/meson-ir.c
+++ b/drivers/media/rc/meson-ir.c
@@ -177,7 +177,7 @@ static int meson_ir_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int meson_ir_remove(struct platform_device *pdev)
+static void meson_ir_remove(struct platform_device *pdev)
 {
 	struct meson_ir *ir = platform_get_drvdata(pdev);
 	unsigned long flags;
@@ -186,8 +186,6 @@ static int meson_ir_remove(struct platform_device *pdev)
 	spin_lock_irqsave(&ir->lock, flags);
 	meson_ir_set_mask(ir, IR_DEC_REG1, REG1_ENABLE, 0);
 	spin_unlock_irqrestore(&ir->lock, flags);
-
-	return 0;
 }
 
 static void meson_ir_shutdown(struct platform_device *pdev)
@@ -226,7 +224,7 @@ MODULE_DEVICE_TABLE(of, meson_ir_match);
 
 static struct platform_driver meson_ir_driver = {
 	.probe		= meson_ir_probe,
-	.remove		= meson_ir_remove,
+	.remove_new	= meson_ir_remove,
 	.shutdown	= meson_ir_shutdown,
 	.driver = {
 		.name		= DRIVER_NAME,
-- 
2.39.2


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Re: [PATCH 107/117] media: meson-ir: Convert to platform remove callback returning void

[Martin Blumenstingl]

On Sun, Mar 26, 2023 at 4:32 PM Uwe Kleine-König
<u.kleine-koenig@pengutronix.de> wrote:
>
> The .remove() callback for a platform driver returns an int which makes
> many driver authors wrongly assume it's possible to do error handling by
> returning an error code. However the value returned is (mostly) ignored
> and this typically results in resource leaks. To improve here there is a
> quest to make the remove callback return void. In the first step of this
> quest all drivers are converted to .remove_new() which already returns
> void.
>
> Trivially convert this driver from always returning zero in the remove
> callback to the void returning variant.
>
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>

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Re: [PATCH 000/117] media: Convert to platform remove callback returning void

[Uwe Kleine-König]

[-- Attachment #1.1: Type: text/plain, Size: 1863 bytes --]

Hello Mauro

On Sun, Mar 26, 2023 at 04:30:25PM +0200, Uwe Kleine-König wrote:
> Hello,
> 
> this series adapts the platform drivers below drivers/pci to use the

copy&paste failure here: s/pci/media/ of course.

> .remove_new() callback. Compared to the traditional .remove() callback
> .remove_new() returns no value. This is a good thing because the driver core
> doesn't (and cannot) cope for errors during remove. The only effect of a
> non-zero return value in .remove() is that the driver core emits a warning. The
> device is removed anyhow and an early return from .remove() usually yields a
> resource leak.
> 
> By changing the remove callback to return void driver authors cannot
> reasonably assume any more that there is some kind of cleanup later.
> 
> Only three drivers needed some preparation first to make sure they
> return 0 unconditionally in their remove callback. Then all drivers
> could be trivially converted without side effects to .remove_new().
> 
> The changes to the individual drivers are all orthogonal. If I need to
> resend some patches because of some review feedback, I'd like to only
> send the patches that actually needed changes, so please pick up the
> remaining patches that don't need changing to reduce the amount of mail.

I didn't hear anything back about application of this series. Is there a
blocker somewhere?

Apart from the three preparatory patches that are a precondition to the
conversion of the respective drivers, the patches are all pairwise
orthogonal. So from my POV the best would be to apply all patches that
still apply (which might be all), I will care for the fallout later
then.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

[-- Attachment #1.2: signature.asc --]
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Re: [PATCH 000/117] media: Convert to platform remove callback returning void

[Laurent Pinchart]

Hi Uwe,

On Mon, Apr 17, 2023 at 08:02:03AM +0200, Uwe Kleine-König wrote:
> Hello Mauro
> 
> On Sun, Mar 26, 2023 at 04:30:25PM +0200, Uwe Kleine-König wrote:
> > Hello,
> > 
> > this series adapts the platform drivers below drivers/pci to use the
> 
> copy&paste failure here: s/pci/media/ of course.
> 
> > .remove_new() callback. Compared to the traditional .remove() callback
> > .remove_new() returns no value. This is a good thing because the driver core
> > doesn't (and cannot) cope for errors during remove. The only effect of a
> > non-zero return value in .remove() is that the driver core emits a warning. The
> > device is removed anyhow and an early return from .remove() usually yields a
> > resource leak.
> > 
> > By changing the remove callback to return void driver authors cannot
> > reasonably assume any more that there is some kind of cleanup later.
> > 
> > Only three drivers needed some preparation first to make sure they
> > return 0 unconditionally in their remove callback. Then all drivers
> > could be trivially converted without side effects to .remove_new().
> > 
> > The changes to the individual drivers are all orthogonal. If I need to
> > resend some patches because of some review feedback, I'd like to only
> > send the patches that actually needed changes, so please pick up the
> > remaining patches that don't need changing to reduce the amount of mail.
> 
> I didn't hear anything back about application of this series. Is there a
> blocker somewhere?

I think the series got applied to the master branch of
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git.
It should thus appear in v6.4.

The corresponding series for staging media drivers has also been applied
to the same branch as far as I can tell.

> Apart from the three preparatory patches that are a precondition to the
> conversion of the respective drivers, the patches are all pairwise
> orthogonal. So from my POV the best would be to apply all patches that
> still apply (which might be all), I will care for the fallout later
> then.

-- 
Regards,

Laurent Pinchart

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Re: [PATCH 000/117] media: Convert to platform remove callback returning void

[Uwe Kleine-König]

[-- Attachment #1.1: Type: text/plain, Size: 2324 bytes --]

Hello Laurent,

On Mon, Apr 17, 2023 at 09:19:28AM +0300, Laurent Pinchart wrote:
> On Mon, Apr 17, 2023 at 08:02:03AM +0200, Uwe Kleine-König wrote:
> > On Sun, Mar 26, 2023 at 04:30:25PM +0200, Uwe Kleine-König wrote:
> > > Hello,
> > > 
> > > this series adapts the platform drivers below drivers/pci to use the
> > 
> > copy&paste failure here: s/pci/media/ of course.
> > 
> > > .remove_new() callback. Compared to the traditional .remove() callback
> > > .remove_new() returns no value. This is a good thing because the driver core
> > > doesn't (and cannot) cope for errors during remove. The only effect of a
> > > non-zero return value in .remove() is that the driver core emits a warning. The
> > > device is removed anyhow and an early return from .remove() usually yields a
> > > resource leak.
> > > 
> > > By changing the remove callback to return void driver authors cannot
> > > reasonably assume any more that there is some kind of cleanup later.
> > > 
> > > Only three drivers needed some preparation first to make sure they
> > > return 0 unconditionally in their remove callback. Then all drivers
> > > could be trivially converted without side effects to .remove_new().
> > > 
> > > The changes to the individual drivers are all orthogonal. If I need to
> > > resend some patches because of some review feedback, I'd like to only
> > > send the patches that actually needed changes, so please pick up the
> > > remaining patches that don't need changing to reduce the amount of mail.
> > 
> > I didn't hear anything back about application of this series. Is there a
> > blocker somewhere?
> 
> I think the series got applied to the master branch of
> git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git.
> It should thus appear in v6.4.

I guess that linux-stable.git is a copy&paste failure (and it's not
there). I don't see the series in the master branch of
git://linuxtv.org/media_tree.git either.

.. a bit later ...

ah, it's in git://linuxtv.org/mchehab/media-next.git

I guess I was just to quick and probably the series will be included in
today's next.

Thanks
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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Re: [PATCH 000/117] media: Convert to platform remove callback returning void

[Laurent Pinchart]

On Mon, Apr 17, 2023 at 09:30:49AM +0200, Uwe Kleine-König wrote:
> Hello Laurent,
> 
> On Mon, Apr 17, 2023 at 09:19:28AM +0300, Laurent Pinchart wrote:
> > On Mon, Apr 17, 2023 at 08:02:03AM +0200, Uwe Kleine-König wrote:
> > > On Sun, Mar 26, 2023 at 04:30:25PM +0200, Uwe Kleine-König wrote:
> > > > Hello,
> > > > 
> > > > this series adapts the platform drivers below drivers/pci to use the
> > > 
> > > copy&paste failure here: s/pci/media/ of course.
> > > 
> > > > .remove_new() callback. Compared to the traditional .remove() callback
> > > > .remove_new() returns no value. This is a good thing because the driver core
> > > > doesn't (and cannot) cope for errors during remove. The only effect of a
> > > > non-zero return value in .remove() is that the driver core emits a warning. The
> > > > device is removed anyhow and an early return from .remove() usually yields a
> > > > resource leak.
> > > > 
> > > > By changing the remove callback to return void driver authors cannot
> > > > reasonably assume any more that there is some kind of cleanup later.
> > > > 
> > > > Only three drivers needed some preparation first to make sure they
> > > > return 0 unconditionally in their remove callback. Then all drivers
> > > > could be trivially converted without side effects to .remove_new().
> > > > 
> > > > The changes to the individual drivers are all orthogonal. If I need to
> > > > resend some patches because of some review feedback, I'd like to only
> > > > send the patches that actually needed changes, so please pick up the
> > > > remaining patches that don't need changing to reduce the amount of mail.
> > > 
> > > I didn't hear anything back about application of this series. Is there a
> > > blocker somewhere?
> > 
> > I think the series got applied to the master branch of
> > git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git.
> > It should thus appear in v6.4.
> 
> I guess that linux-stable.git is a copy&paste failure (and it's not
> there). I don't see the series in the master branch of
> git://linuxtv.org/media_tree.git either.

Oops sorry. It was a copy & paste mistake indeed, I meant

git://linuxtv.org/media_stage.git

> .. a bit later ...
> 
> ah, it's in git://linuxtv.org/mchehab/media-next.git
> 
> I guess I was just to quick and probably the series will be included in
> today's next.

-- 
Regards,

Laurent Pinchart

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RE: [PATCH 000/117] media: Convert to platform remove callback returning void

[Biju Das]

Hi Uwe,

> -----Original Message-----
> From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
> Sent: Monday, April 17, 2023 8:31 AM
> To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Cc: Heiko Stuebner <heiko@sntech.de>; Eddie James <eajames@linux.ibm.com>;
> Hans Verkuil <hverkuil@xs4all.nl>; Alim Akhtar <alim.akhtar@samsung.com>;
> Dmitry Osipenko <digetx@gmail.com>; linux-stm32@st-md-
> mailman.stormreply.com; Marek Szyprowski <m.szyprowski@samsung.com>; linux-
> samsung-soc@vger.kernel.org; Robert Foss <rfoss@kernel.org>; Dafna
> Hirschfeld <dafna@fastmail.com>; Samuel Holland <samuel@sholland.org>; Kevin
> Hilman <khilman@baylibre.com>; Michal Simek <michal.simek@xilinx.com>; Antti
> Palosaari <crope@iki.fi>; NXP Linux Team <linux-imx@nxp.com>; Jerome Brunet
> <jbrunet@baylibre.com>; linux-sunxi@lists.linux.dev; ye xingchen
> <ye.xingchen@zte.com.cn>; Sascha Hauer <s.hauer@pengutronix.de>; Łukasz
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> <agross@kernel.org>; Mikhail Ulyanov <mikhail.ulyanov@cogentembedded.com>;
> Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@bp.renesas.com>; Benoit
> Parrot <bparrot@ti.com>; Rui Miguel Silva <rmfrfs@gmail.com>; Christophe
> JAILLET <christophe.jaillet@wanadoo.fr>; Yong Deng <yong.deng@magewell.com>;
> Matthias Brugger <matthias.bgg@gmail.com>; Tiffany Lin
> <tiffany.lin@mediatek.com>; AngeloGioacchino Del Regno
> <angelogioacchino.delregno@collabora.com>; Bjorn Andersson
> <andersson@kernel.org>; Nicolas Ferre <nicolas.ferre@microchip.com>; Houlong
> Wei <houlong.wei@mediatek.com>; Krzysztof Kozlowski
> <krzysztof.kozlowski@linaro.org>; Philipp Zabel <p.zabel@pengutronix.de>;
> Niklas Söderlund <niklas.soderlund@ragnatech.se>
> Subject: Re: [PATCH 000/117] media: Convert to platform remove callback
> returning void
> 
> Hello Laurent,
> 
> On Mon, Apr 17, 2023 at 09:19:28AM +0300, Laurent Pinchart wrote:
> > On Mon, Apr 17, 2023 at 08:02:03AM +0200, Uwe Kleine-König wrote:
> > > On Sun, Mar 26, 2023 at 04:30:25PM +0200, Uwe Kleine-König wrote:
> > > > Hello,
> > > >
> > > > this series adapts the platform drivers below drivers/pci to use
> > > > the
> > >
> > > copy&paste failure here: s/pci/media/ of course.
> > >
> > > > .remove_new() callback. Compared to the traditional .remove()
> > > > callback
> > > > .remove_new() returns no value. This is a good thing because the
> > > > driver core doesn't (and cannot) cope for errors during remove.
> > > > The only effect of a non-zero return value in .remove() is that
> > > > the driver core emits a warning. The device is removed anyhow and
> > > > an early return from .remove() usually yields a resource leak.
> > > >
> > > > By changing the remove callback to return void driver authors
> > > > cannot reasonably assume any more that there is some kind of cleanup
> later.
> > > >
> > > > Only three drivers needed some preparation first to make sure they
> > > > return 0 unconditionally in their remove callback. Then all
> > > > drivers could be trivially converted without side effects to
> .remove_new().
> > > >
> > > > The changes to the individual drivers are all orthogonal. If I
> > > > need to resend some patches because of some review feedback, I'd
> > > > like to only send the patches that actually needed changes, so
> > > > please pick up the remaining patches that don't need changing to
> reduce the amount of mail.
> > >
> > > I didn't hear anything back about application of this series. Is
> > > there a blocker somewhere?
> >
> > I think the series got applied to the master branch of
> > git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git.
> > It should thus appear in v6.4.
> 
> I guess that linux-stable.git is a copy&paste failure (and it's not there).
> I don't see the series in the master branch of
> git://linuxtv.org/media_tree.git either.
> 
> .. a bit later ...
> 
> ah, it's in git://linuxtv.org/mchehab/media-next.git
> 
> I guess I was just to quick and probably the series will be included in
> today's next.

I believe patchwork <patchwork@linuxtv.org> will send notification to
author and along with people who applied tags for that patch.

I normally get notification from patchwork <patchwork@linuxtv.org>
When the state of patch changes.

Cheers,
Biju

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Re: [PATCH 000/117] media: Convert to platform remove callback returning void

[Uwe Kleine-König]

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On Mon, Apr 17, 2023 at 07:57:57AM +0000, Biju Das wrote:
> Hi Uwe,
> > > I think the series got applied to the master branch of
> > > git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git.
> > > It should thus appear in v6.4.
> > 
> > I guess that linux-stable.git is a copy&paste failure (and it's not there).
> > I don't see the series in the master branch of
> > git://linuxtv.org/media_tree.git either.
> > 
> > .. a bit later ...
> > 
> > ah, it's in git://linuxtv.org/mchehab/media-next.git
> > 
> > I guess I was just to quick and probably the series will be included in
> > today's next.
> 
> I believe patchwork <patchwork@linuxtv.org> will send notification to
> author and along with people who applied tags for that patch.

Indeed, I got such a notification on Apr 11. But even if I had that on
my radar when asking and considered such notifications reliable in
general, I would have asked, as the patches didn't apprear in next up to
now.

Thanks
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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