2020-11-27 09:23:02

by Xu Wang

Subject: [PATCH] drm: bridge: adv7511: Remove redundant null check before clk_disable_unprepare

Because clk_disable_unprepare() already checked NULL clock parameter,
so the additional check is unnecessary, just remove them.

Signed-off-by: Xu Wang <[email protected]>
---
drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
index a0d392c338da..76555ae64e9c 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
@@ -1292,8 +1292,7 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)

err_unregister_cec:
i2c_unregister_device(adv7511->i2c_cec);
- if (adv7511->cec_clk)
- clk_disable_unprepare(adv7511->cec_clk);
+ clk_disable_unprepare(adv7511->cec_clk);
err_i2c_unregister_packet:
i2c_unregister_device(adv7511->i2c_packet);
err_i2c_unregister_edid:
@@ -1311,8 +1310,7 @@ static int adv7511_remove(struct i2c_client *i2c)
if (adv7511->type == ADV7533 || adv7511->type == ADV7535)
adv7533_detach_dsi(adv7511);
i2c_unregister_device(adv7511->i2c_cec);
- if (adv7511->cec_clk)
- clk_disable_unprepare(adv7511->cec_clk);
+ clk_disable_unprepare(adv7511->cec_clk);

adv7511_uninit_regulators(adv7511);

--
2.17.1

2020-12-20 18:11:09

by Laurent Pinchart

Subject: Re: [PATCH] drm: bridge: adv7511: Remove redundant null check before clk_disable_unprepare

Hi Xu Wang,

Thank you for the patch.

On Fri, Nov 27, 2020 at 09:18:29AM +0000, Xu Wang wrote:
> Because clk_disable_unprepare() already checked NULL clock parameter,
> so the additional check is unnecessary, just remove them.
>
> Signed-off-by: Xu Wang <[email protected]>

Reviewed-by: Laurent Pinchart <[email protected]>

> ---
> drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> index a0d392c338da..76555ae64e9c 100644
> --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> @@ -1292,8 +1292,7 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
>
> err_unregister_cec:
> i2c_unregister_device(adv7511->i2c_cec);
> - if (adv7511->cec_clk)
> - clk_disable_unprepare(adv7511->cec_clk);
> + clk_disable_unprepare(adv7511->cec_clk);
> err_i2c_unregister_packet:
> i2c_unregister_device(adv7511->i2c_packet);
> err_i2c_unregister_edid:
> @@ -1311,8 +1310,7 @@ static int adv7511_remove(struct i2c_client *i2c)
> if (adv7511->type == ADV7533 || adv7511->type == ADV7535)
> adv7533_detach_dsi(adv7511);
> i2c_unregister_device(adv7511->i2c_cec);
> - if (adv7511->cec_clk)
> - clk_disable_unprepare(adv7511->cec_clk);
> + clk_disable_unprepare(adv7511->cec_clk);
>
> adv7511_uninit_regulators(adv7511);
>

--
Regards,

Laurent Pinchart