* [PATCH 00/30] clk: Convert to platform remove callback returning void
@ 2023-03-12 16:14 Uwe Kleine-König
2023-03-12 16:15 ` [PATCH 23/30] clk: renesas: " Uwe Kleine-König
2023-03-15 23:35 ` (subset) [PATCH 00/30] clk: " Bjorn Andersson
0 siblings, 2 replies; 4+ messages in thread
From: Uwe Kleine-König @ 2023-03-12 16:14 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd, Matthias Brugger,
Peter De Schrijver, Prashant Gaikwad, Thierry Reding,
Jonathan Hunter, Michal Simek, Eugeniy Paltsev, Florian Fainelli,
Krzysztof Kozlowski, Sudeep Holla, Maxime Coquelin,
Alexandre Torgue, Nishanth Menon, Tero Kristo, Santosh Shilimkar,
Bjorn Andersson, Andy Gross, Geert Uytterhoeven,
Sylwester Nawrocki, Tomasz Figa, Chanwoo Choi, Kunihiko Hayashi,
Masami Hiramatsu
Cc: AngeloGioacchino Del Regno, linux-clk, linux-kernel,
linux-arm-kernel, linux-mediatek, linux-tegra,
Broadcom internal kernel review list, linux-rpi-kernel,
linux-samsung-soc, Cristian Marussi, linux-stm32, Konrad Dybcio,
linux-arm-msm, linux-renesas-soc, Alim Akhtar, linux-omap
Hello,
this patch series adapts the platform drivers below drivers/clk
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.
There were three drivers that did such an early error return in their
remove callback. Two of them are fixed, the tegra one is more
complicated. I only converted it to return zero (which only suppresses
the duplicated warning by the driver core, but doesn't make the resource
leak better or worse.) This needs some more attention by someone who
understands the driver in question.
By changing the remove callback to return void driver authors cannot
reasonably assume any more that there is some kind of cleanup later
which prevents that such programming errors are introduced in the first
place.
Note that this series depends on commit 5c5a7680e67b ("platform: Provide
a remove callback that returns no value") which is included in v6.3-rc1.
Uwe Kleine-König (30):
clk: mediatek: Make mtk_clk_simple_remove() return void
clk: tegra: Don't warn three times about failure to unregister
clk: xilinx: Drop if block with always false condition
clk: axs10x: Convert to platform remove callback returning void
clk: bcm: Convert to platform remove callback returning void
clk: axi-clkgen: Convert to platform remove callback returning void
clk: axm5516: Convert to platform remove callback returning void
clk: fixed-factor: Convert to platform remove callback returning void
clk: fixed-mmio: Convert to platform remove callback returning void
clk: fixed-rate: Convert to platform remove callback returning void
clk: hsdk-pll: Convert to platform remove callback returning void
clk: palmas: Convert to platform remove callback returning void
clk: pwm: Convert to platform remove callback returning void
clk: s2mps11: Convert to platform remove callback returning void
clk: scpi: Convert to platform remove callback returning void
clk: stm32mp1: Convert to platform remove callback returning void
clk: hisilicon: Convert to platform remove callback returning void
clk: keystone: Convert to platform remove callback returning void
clk: mediatek: Convert to platform remove callback returning void
clk: mmp: Convert to platform remove callback returning void
clk: mvebu: Convert to platform remove callback returning void
clk: qcom: Convert to platform remove callback returning void
clk: renesas: Convert to platform remove callback returning void
clk: samsung: Convert to platform remove callback returning void
clk: stm32: Convert to platform remove callback returning void
clk: tegra: Convert to platform remove callback returning void
clk: ti: Convert to platform remove callback returning void
clk: uniphier: Convert to platform remove callback returning void
clk: x86: Convert to platform remove callback returning void
clk: xilinx: Convert to platform remove callback returning void
drivers/clk/axs10x/i2s_pll_clock.c | 5 ++---
drivers/clk/axs10x/pll_clock.c | 5 ++---
drivers/clk/bcm/clk-bcm2711-dvp.c | 6 ++----
drivers/clk/bcm/clk-bcm63xx-gate.c | 6 ++----
drivers/clk/bcm/clk-raspberrypi.c | 6 ++----
drivers/clk/clk-axi-clkgen.c | 6 ++----
drivers/clk/clk-axm5516.c | 5 ++---
drivers/clk/clk-fixed-factor.c | 6 ++----
drivers/clk/clk-fixed-mmio.c | 6 ++----
drivers/clk/clk-fixed-rate.c | 6 ++----
drivers/clk/clk-hsdk-pll.c | 5 ++---
drivers/clk/clk-palmas.c | 5 ++---
drivers/clk/clk-pwm.c | 6 ++----
drivers/clk/clk-s2mps11.c | 6 ++----
drivers/clk/clk-scpi.c | 5 ++---
drivers/clk/clk-stm32mp1.c | 6 ++----
drivers/clk/hisilicon/clk-hi3519.c | 5 ++---
drivers/clk/hisilicon/clk-hi3559a.c | 5 ++---
drivers/clk/hisilicon/crg-hi3516cv300.c | 5 ++---
drivers/clk/hisilicon/crg-hi3798cv200.c | 5 ++---
drivers/clk/keystone/sci-clk.c | 6 ++----
drivers/clk/mediatek/clk-mt2701-aud.c | 6 +++---
drivers/clk/mediatek/clk-mt2701-bdp.c | 2 +-
drivers/clk/mediatek/clk-mt2701-eth.c | 2 +-
drivers/clk/mediatek/clk-mt2701-g3d.c | 2 +-
drivers/clk/mediatek/clk-mt2701-hif.c | 2 +-
drivers/clk/mediatek/clk-mt2701-img.c | 2 +-
drivers/clk/mediatek/clk-mt2701-vdec.c | 2 +-
drivers/clk/mediatek/clk-mt2712-bdp.c | 2 +-
drivers/clk/mediatek/clk-mt2712-img.c | 2 +-
drivers/clk/mediatek/clk-mt2712-jpgdec.c | 2 +-
drivers/clk/mediatek/clk-mt2712-mfg.c | 2 +-
drivers/clk/mediatek/clk-mt2712-vdec.c | 2 +-
drivers/clk/mediatek/clk-mt2712-venc.c | 2 +-
drivers/clk/mediatek/clk-mt2712.c | 2 +-
drivers/clk/mediatek/clk-mt6765-audio.c | 2 +-
drivers/clk/mediatek/clk-mt6765-cam.c | 2 +-
drivers/clk/mediatek/clk-mt6765-img.c | 2 +-
drivers/clk/mediatek/clk-mt6765-mipi0a.c | 2 +-
drivers/clk/mediatek/clk-mt6765-mm.c | 2 +-
drivers/clk/mediatek/clk-mt6765-vcodec.c | 2 +-
drivers/clk/mediatek/clk-mt6779-aud.c | 2 +-
drivers/clk/mediatek/clk-mt6779-cam.c | 2 +-
drivers/clk/mediatek/clk-mt6779-img.c | 2 +-
drivers/clk/mediatek/clk-mt6779-ipe.c | 2 +-
drivers/clk/mediatek/clk-mt6779-mfg.c | 2 +-
drivers/clk/mediatek/clk-mt6779-vdec.c | 2 +-
drivers/clk/mediatek/clk-mt6779-venc.c | 2 +-
drivers/clk/mediatek/clk-mt6779.c | 2 +-
drivers/clk/mediatek/clk-mt6795-apmixedsys.c | 6 ++----
drivers/clk/mediatek/clk-mt6795-infracfg.c | 6 ++----
drivers/clk/mediatek/clk-mt6795-mfg.c | 2 +-
drivers/clk/mediatek/clk-mt6795-mm.c | 6 ++----
drivers/clk/mediatek/clk-mt6795-pericfg.c | 6 ++----
drivers/clk/mediatek/clk-mt6795-topckgen.c | 2 +-
drivers/clk/mediatek/clk-mt6795-vdecsys.c | 2 +-
drivers/clk/mediatek/clk-mt6795-vencsys.c | 2 +-
drivers/clk/mediatek/clk-mt6797-img.c | 2 +-
drivers/clk/mediatek/clk-mt6797-vdec.c | 2 +-
drivers/clk/mediatek/clk-mt6797-venc.c | 2 +-
drivers/clk/mediatek/clk-mt7622-aud.c | 6 +++---
drivers/clk/mediatek/clk-mt7622-eth.c | 2 +-
drivers/clk/mediatek/clk-mt7622-hif.c | 2 +-
drivers/clk/mediatek/clk-mt7629-hif.c | 2 +-
drivers/clk/mediatek/clk-mt7981-eth.c | 2 +-
drivers/clk/mediatek/clk-mt7981-infracfg.c | 2 +-
drivers/clk/mediatek/clk-mt7981-topckgen.c | 2 +-
drivers/clk/mediatek/clk-mt7986-topckgen.c | 2 +-
drivers/clk/mediatek/clk-mt8173-apmixedsys.c | 6 ++----
drivers/clk/mediatek/clk-mt8173-img.c | 2 +-
drivers/clk/mediatek/clk-mt8173-infracfg.c | 6 ++----
drivers/clk/mediatek/clk-mt8173-mm.c | 6 ++----
drivers/clk/mediatek/clk-mt8173-pericfg.c | 2 +-
drivers/clk/mediatek/clk-mt8173-topckgen.c | 2 +-
drivers/clk/mediatek/clk-mt8173-vdecsys.c | 2 +-
drivers/clk/mediatek/clk-mt8173-vencsys.c | 2 +-
drivers/clk/mediatek/clk-mt8183-audio.c | 6 +++---
drivers/clk/mediatek/clk-mt8183-cam.c | 2 +-
drivers/clk/mediatek/clk-mt8183-img.c | 2 +-
drivers/clk/mediatek/clk-mt8183-ipu0.c | 2 +-
drivers/clk/mediatek/clk-mt8183-ipu1.c | 2 +-
drivers/clk/mediatek/clk-mt8183-ipu_adl.c | 2 +-
drivers/clk/mediatek/clk-mt8183-ipu_conn.c | 2 +-
drivers/clk/mediatek/clk-mt8183-mfgcfg.c | 2 +-
drivers/clk/mediatek/clk-mt8183-vdec.c | 2 +-
drivers/clk/mediatek/clk-mt8183-venc.c | 2 +-
drivers/clk/mediatek/clk-mt8183.c | 2 +-
drivers/clk/mediatek/clk-mt8186-apmixedsys.c | 6 ++----
drivers/clk/mediatek/clk-mt8186-cam.c | 2 +-
drivers/clk/mediatek/clk-mt8186-img.c | 2 +-
drivers/clk/mediatek/clk-mt8186-imp_iic_wrap.c | 2 +-
drivers/clk/mediatek/clk-mt8186-infra_ao.c | 2 +-
drivers/clk/mediatek/clk-mt8186-ipe.c | 2 +-
drivers/clk/mediatek/clk-mt8186-mcu.c | 6 ++----
drivers/clk/mediatek/clk-mt8186-mdp.c | 2 +-
drivers/clk/mediatek/clk-mt8186-mfg.c | 2 +-
drivers/clk/mediatek/clk-mt8186-mm.c | 6 ++----
drivers/clk/mediatek/clk-mt8186-topckgen.c | 2 +-
drivers/clk/mediatek/clk-mt8186-vdec.c | 2 +-
drivers/clk/mediatek/clk-mt8186-venc.c | 2 +-
drivers/clk/mediatek/clk-mt8186-wpe.c | 2 +-
drivers/clk/mediatek/clk-mt8192-aud.c | 6 +++---
drivers/clk/mediatek/clk-mt8192-cam.c | 2 +-
drivers/clk/mediatek/clk-mt8192-img.c | 2 +-
drivers/clk/mediatek/clk-mt8192-imp_iic_wrap.c | 2 +-
drivers/clk/mediatek/clk-mt8192-ipe.c | 2 +-
drivers/clk/mediatek/clk-mt8192-mdp.c | 2 +-
drivers/clk/mediatek/clk-mt8192-mfg.c | 2 +-
drivers/clk/mediatek/clk-mt8192-msdc.c | 2 +-
drivers/clk/mediatek/clk-mt8192-scp_adsp.c | 2 +-
drivers/clk/mediatek/clk-mt8192-vdec.c | 2 +-
drivers/clk/mediatek/clk-mt8192-venc.c | 2 +-
drivers/clk/mediatek/clk-mt8192.c | 2 +-
drivers/clk/mediatek/clk-mt8195-apmixedsys.c | 6 ++----
drivers/clk/mediatek/clk-mt8195-apusys_pll.c | 6 ++----
drivers/clk/mediatek/clk-mt8195-cam.c | 2 +-
drivers/clk/mediatek/clk-mt8195-ccu.c | 2 +-
drivers/clk/mediatek/clk-mt8195-img.c | 2 +-
drivers/clk/mediatek/clk-mt8195-imp_iic_wrap.c | 2 +-
drivers/clk/mediatek/clk-mt8195-infra_ao.c | 2 +-
drivers/clk/mediatek/clk-mt8195-ipe.c | 2 +-
drivers/clk/mediatek/clk-mt8195-mfg.c | 2 +-
drivers/clk/mediatek/clk-mt8195-peri_ao.c | 2 +-
drivers/clk/mediatek/clk-mt8195-scp_adsp.c | 2 +-
drivers/clk/mediatek/clk-mt8195-topckgen.c | 6 ++----
drivers/clk/mediatek/clk-mt8195-vdec.c | 2 +-
drivers/clk/mediatek/clk-mt8195-vdo0.c | 6 ++----
drivers/clk/mediatek/clk-mt8195-vdo1.c | 6 ++----
drivers/clk/mediatek/clk-mt8195-venc.c | 2 +-
drivers/clk/mediatek/clk-mt8195-vpp0.c | 6 ++----
drivers/clk/mediatek/clk-mt8195-vpp1.c | 6 ++----
drivers/clk/mediatek/clk-mt8195-wpe.c | 2 +-
drivers/clk/mediatek/clk-mt8365-apu.c | 2 +-
drivers/clk/mediatek/clk-mt8365-cam.c | 2 +-
drivers/clk/mediatek/clk-mt8365-mfg.c | 2 +-
drivers/clk/mediatek/clk-mt8365-vdec.c | 2 +-
drivers/clk/mediatek/clk-mt8365-venc.c | 2 +-
drivers/clk/mediatek/clk-mtk.c | 4 +---
drivers/clk/mediatek/clk-mtk.h | 2 +-
drivers/clk/mmp/clk-audio.c | 6 ++----
drivers/clk/mvebu/armada-37xx-periph.c | 6 ++----
drivers/clk/mvebu/armada-37xx-tbg.c | 6 ++----
drivers/clk/mvebu/armada-37xx-xtal.c | 6 ++----
drivers/clk/qcom/apcs-msm8916.c | 6 ++----
drivers/clk/qcom/apcs-sdx55.c | 6 ++----
drivers/clk/qcom/clk-rpm.c | 5 ++---
drivers/clk/qcom/gcc-msm8960.c | 6 ++----
drivers/clk/renesas/rcar-usb2-clock-sel.c | 6 ++----
drivers/clk/samsung/clk-exynos-audss.c | 6 ++----
drivers/clk/samsung/clk-exynos-clkout.c | 6 ++----
drivers/clk/stm32/clk-stm32mp13.c | 6 ++----
drivers/clk/tegra/clk-dfll.c | 5 ++++-
drivers/clk/tegra/clk-tegra124-dfll-fcpu.c | 17 ++++++++---------
drivers/clk/ti/adpll.c | 6 ++----
drivers/clk/uniphier/clk-uniphier-core.c | 6 ++----
drivers/clk/x86/clk-fch.c | 7 +++----
drivers/clk/x86/clk-pmc-atom.c | 5 ++---
drivers/clk/xilinx/clk-xlnx-clock-wizard.c | 6 ++----
drivers/clk/xilinx/xlnx_vcu.c | 8 ++------
159 files changed, 234 insertions(+), 335 deletions(-)
base-commit: fe15c26ee26efa11741a7b632e9f23b01aca4cc6
--
2.39.1
^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH 23/30] clk: renesas: Convert to platform remove callback returning void
2023-03-12 16:14 [PATCH 00/30] clk: Convert to platform remove callback returning void Uwe Kleine-König
@ 2023-03-12 16:15 ` Uwe Kleine-König
2023-03-13 9:05 ` Geert Uytterhoeven
2023-03-15 23:35 ` (subset) [PATCH 00/30] clk: " Bjorn Andersson
1 sibling, 1 reply; 4+ messages in thread
From: Uwe Kleine-König @ 2023-03-12 16:15 UTC (permalink / raw)
To: Geert Uytterhoeven, Michael Turquette, Stephen Boyd
Cc: linux-renesas-soc, linux-clk, linux-kernel
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/clk/renesas/rcar-usb2-clock-sel.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/drivers/clk/renesas/rcar-usb2-clock-sel.c b/drivers/clk/renesas/rcar-usb2-clock-sel.c
index 684d8937965e..17c110978e33 100644
--- a/drivers/clk/renesas/rcar-usb2-clock-sel.c
+++ b/drivers/clk/renesas/rcar-usb2-clock-sel.c
@@ -125,15 +125,13 @@ static int rcar_usb2_clock_sel_resume(struct device *dev)
return 0;
}
-static int rcar_usb2_clock_sel_remove(struct platform_device *pdev)
+static void rcar_usb2_clock_sel_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
of_clk_del_provider(dev->of_node);
pm_runtime_put(dev);
pm_runtime_disable(dev);
-
- return 0;
}
static int rcar_usb2_clock_sel_probe(struct platform_device *pdev)
@@ -215,7 +213,7 @@ static struct platform_driver rcar_usb2_clock_sel_driver = {
.pm = &rcar_usb2_clock_sel_pm_ops,
},
.probe = rcar_usb2_clock_sel_probe,
- .remove = rcar_usb2_clock_sel_remove,
+ .remove_new = rcar_usb2_clock_sel_remove,
};
builtin_platform_driver(rcar_usb2_clock_sel_driver);
--
2.39.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH 23/30] clk: renesas: Convert to platform remove callback returning void
2023-03-12 16:15 ` [PATCH 23/30] clk: renesas: " Uwe Kleine-König
@ 2023-03-13 9:05 ` Geert Uytterhoeven
0 siblings, 0 replies; 4+ messages in thread
From: Geert Uytterhoeven @ 2023-03-13 9:05 UTC (permalink / raw)
To: Uwe Kleine-König
Cc: Michael Turquette, Stephen Boyd, linux-renesas-soc, linux-clk,
linux-kernel
On Sun, Mar 12, 2023 at 5:15 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: Geert Uytterhoeven <geert+renesas@glider.be>
i.e. will queue in renesas-clk-for-v6.4.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: (subset) [PATCH 00/30] clk: Convert to platform remove callback returning void
2023-03-12 16:14 [PATCH 00/30] clk: Convert to platform remove callback returning void Uwe Kleine-König
2023-03-12 16:15 ` [PATCH 23/30] clk: renesas: " Uwe Kleine-König
@ 2023-03-15 23:35 ` Bjorn Andersson
1 sibling, 0 replies; 4+ messages in thread
From: Bjorn Andersson @ 2023-03-15 23:35 UTC (permalink / raw)
To: Tero Kristo, Alexandre Torgue, Chanwoo Choi, Krzysztof Kozlowski,
Santosh Shilimkar, Eugeniy Paltsev, Michal Simek, Nishanth Menon,
Michael Turquette, Peter De Schrijver, Maxime Coquelin,
Thierry Reding, Geert Uytterhoeven, Tomasz Figa, Stephen Boyd,
Uwe Kleine-König, Sylwester Nawrocki, Andy Gross,
Masami Hiramatsu, Kunihiko Hayashi, Florian Fainelli,
Sudeep Holla, Jonathan Hunter, Prashant Gaikwad,
Matthias Brugger
Cc: linux-arm-msm, Konrad Dybcio, Alim Akhtar, linux-tegra,
AngeloGioacchino Del Regno, linux-stm32,
Broadcom internal kernel review list, linux-samsung-soc,
linux-kernel, linux-arm-kernel, linux-mediatek, linux-clk,
linux-omap, Cristian Marussi, linux-rpi-kernel,
linux-renesas-soc
On Sun, 12 Mar 2023 17:14:42 +0100, Uwe Kleine-König wrote:
> this patch series adapts the platform drivers below drivers/clk
> 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.
>
> [...]
Applied, thanks!
[22/30] clk: qcom: Convert to platform remove callback returning void
commit: c4dc24da5286742f8cc728379f6115c9e886a8a4
Best regards,
--
Bjorn Andersson <andersson@kernel.org>
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2023-03-15 23:34 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2023-03-12 16:14 [PATCH 00/30] clk: Convert to platform remove callback returning void Uwe Kleine-König
2023-03-12 16:15 ` [PATCH 23/30] clk: renesas: " Uwe Kleine-König
2023-03-13 9:05 ` Geert Uytterhoeven
2023-03-15 23:35 ` (subset) [PATCH 00/30] clk: " Bjorn Andersson
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