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* [RESEND PATCH] drm/rockchip: dsi: remove extra component_del() call
@ 2020-12-13 20:57 Thomas Hebb
  0 siblings, 0 replies; 3+ messages in thread
From: Thomas Hebb @ 2020-12-13 20:57 UTC (permalink / raw)
  To: linux-kernel, Heiko Stuebner
  Cc: Thomas Hebb, stable, Andrzej Hajda, Daniel Vetter, David Airlie,
	Sandy Huang, dri-devel, linux-arm-kernel, linux-rockchip

commit cf6d100dd238 ("drm/rockchip: dsi: add dual mipi support") added
this devcnt field and call to component_del(). However, these both
appear to be erroneous changes left over from an earlier version of the
patch. In the version merged, nothing ever modifies devcnt, meaning
component_del() runs unconditionally and in addition to the
component_del() calls in dw_mipi_dsi_rockchip_host_detach(). The second
call fails to delete anything and produces a warning in dmesg.

If we look at the previous version of the patch[1], however, we see that
it had logic to calculate devcnt and call component_add() in certain
situations. This was removed in v6, and the fact that the deletion code
was not appears to have been an oversight.

[1] https://patchwork.kernel.org/project/dri-devel/patch/20180821140515.22246-8-heiko@sntech.de/

Fixes: cf6d100dd238 ("drm/rockchip: dsi: add dual mipi support")
Cc: stable@vger.kernel.org
Signed-off-by: Thomas Hebb <tommyhebb@gmail.com>
---
Resending since I wasn't subscribed to dri-devel

 drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
index 542dcf7eddd6..ce044db8c97e 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
@@ -243,7 +243,6 @@ struct dw_mipi_dsi_rockchip {
 	struct dw_mipi_dsi *dmd;
 	const struct rockchip_dw_dsi_chip_data *cdata;
 	struct dw_mipi_dsi_plat_data pdata;
-	int devcnt;
 };
 
 struct dphy_pll_parameter_map {
@@ -1121,9 +1120,6 @@ static int dw_mipi_dsi_rockchip_remove(struct platform_device *pdev)
 {
 	struct dw_mipi_dsi_rockchip *dsi = platform_get_drvdata(pdev);
 
-	if (dsi->devcnt == 0)
-		component_del(dsi->dev, &dw_mipi_dsi_rockchip_ops);
-
 	dw_mipi_dsi_remove(dsi->dmd);
 
 	return 0;
-- 
2.29.2


^ permalink raw reply related	[flat|nested] 3+ messages in thread

* Re: [RESEND PATCH] drm/rockchip: dsi: remove extra component_del() call
  2021-04-19  2:03 Thomas Hebb
@ 2021-05-28 18:09 ` Heiko Stuebner
  0 siblings, 0 replies; 3+ messages in thread
From: Heiko Stuebner @ 2021-05-28 18:09 UTC (permalink / raw)
  To: linux-kernel, Thomas Hebb
  Cc: Heiko Stuebner, stable, linux-rockchip, Andrzej Hajda, dri-devel,
	David Airlie, Sandy Huang, linux-arm-kernel

On Sun, 18 Apr 2021 19:03:04 -0700, Thomas Hebb wrote:
> commit cf6d100dd238 ("drm/rockchip: dsi: add dual mipi support") added
> this devcnt field and call to component_del(). However, these both
> appear to be erroneous changes left over from an earlier version of the
> patch. In the version merged, nothing ever modifies devcnt, meaning
> component_del() runs unconditionally and in addition to the
> component_del() calls in dw_mipi_dsi_rockchip_host_detach(). The second
> call fails to delete anything and produces a warning in dmesg.
> 
> [...]

Applied, thanks!

[1/1] drm/rockchip: dsi: remove extra component_del() call
      commit: b354498bbe65c917d521b3b56317ddc9ab217425

Best regards,
-- 
Heiko Stuebner <heiko@sntech.de>

^ permalink raw reply	[flat|nested] 3+ messages in thread

* [RESEND PATCH] drm/rockchip: dsi: remove extra component_del() call
@ 2021-04-19  2:03 Thomas Hebb
  2021-05-28 18:09 ` Heiko Stuebner
  0 siblings, 1 reply; 3+ messages in thread
From: Thomas Hebb @ 2021-04-19  2:03 UTC (permalink / raw)
  To: linux-kernel, Heiko Stuebner
  Cc: Thomas Hebb, stable, Andrzej Hajda, Daniel Vetter, David Airlie,
	Sandy Huang, dri-devel, linux-arm-kernel, linux-rockchip

commit cf6d100dd238 ("drm/rockchip: dsi: add dual mipi support") added
this devcnt field and call to component_del(). However, these both
appear to be erroneous changes left over from an earlier version of the
patch. In the version merged, nothing ever modifies devcnt, meaning
component_del() runs unconditionally and in addition to the
component_del() calls in dw_mipi_dsi_rockchip_host_detach(). The second
call fails to delete anything and produces a warning in dmesg.

If we look at the previous version of the patch[1], however, we see that
it had logic to calculate devcnt and call component_add() in certain
situations. This was removed in v6, and the fact that the deletion code
was not appears to have been an oversight.

[1] https://patchwork.kernel.org/project/dri-devel/patch/20180821140515.22246-8-heiko@sntech.de/

Fixes: cf6d100dd238 ("drm/rockchip: dsi: add dual mipi support")
Cc: stable@vger.kernel.org
Signed-off-by: Thomas Hebb <tommyhebb@gmail.com>
---

 drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
index 24a71091759c..8cc81d5b82f0 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
@@ -243,7 +243,6 @@ struct dw_mipi_dsi_rockchip {
 	struct dw_mipi_dsi *dmd;
 	const struct rockchip_dw_dsi_chip_data *cdata;
 	struct dw_mipi_dsi_plat_data pdata;
-	int devcnt;
 };
 
 struct dphy_pll_parameter_map {
@@ -1121,9 +1120,6 @@ static int dw_mipi_dsi_rockchip_remove(struct platform_device *pdev)
 {
 	struct dw_mipi_dsi_rockchip *dsi = platform_get_drvdata(pdev);
 
-	if (dsi->devcnt == 0)
-		component_del(dsi->dev, &dw_mipi_dsi_rockchip_ops);
-
 	dw_mipi_dsi_remove(dsi->dmd);
 
 	return 0;
-- 
2.30.0


^ permalink raw reply related	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2021-05-28 18:09 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2020-12-13 20:57 [RESEND PATCH] drm/rockchip: dsi: remove extra component_del() call Thomas Hebb
2021-04-19  2:03 Thomas Hebb
2021-05-28 18:09 ` Heiko Stuebner

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