| Message ID | 20201014082137.23320-1-vulab@iscas.ac.cn (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | au1100fb: Remove NULL pointer check before clk_enable/disable | expand |
Hi On Wed, 14 Oct 2020 08:21:37 +0000 Xu Wang <vulab@iscas.ac.cn> wrote: > Because clk_enable, clk_disable, clk_prepare, and clk_unprepare already > checked NULL clock parameter, so the additional checks are unnecessary, > just remove them. All clk_*() functions seem to handle NULL pointers gracefully, so you can also remove these checks from the driver's _probe and _remove functions. Best regards Thomas > > Signed-off-by: Xu Wang <vulab@iscas.ac.cn> > --- > drivers/video/fbdev/au1100fb.c | 6 ++---- > 1 file changed, 2 insertions(+), 4 deletions(-) > > diff --git a/drivers/video/fbdev/au1100fb.c b/drivers/video/fbdev/au1100fb.c > index 37a6512feda0..3659dfbb81c1 100644 > --- a/drivers/video/fbdev/au1100fb.c > +++ b/drivers/video/fbdev/au1100fb.c > @@ -560,8 +560,7 @@ int au1100fb_drv_suspend(struct platform_device *dev, > pm_message_t state) /* Blank the LCD */ > au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info); > > - if (fbdev->lcdclk) > - clk_disable(fbdev->lcdclk); > + clk_disable(fbdev->lcdclk); > > memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs)); > > @@ -577,8 +576,7 @@ int au1100fb_drv_resume(struct platform_device *dev) > > memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs)); > > - if (fbdev->lcdclk) > - clk_enable(fbdev->lcdclk); > + clk_enable(fbdev->lcdclk); > > /* Unblank the LCD */ > au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
Hi On 14.10.20 10:21, Xu Wang wrote: > Because clk_enable, clk_disable, clk_prepare, and clk_unprepare already > checked NULL clock parameter, so the additional checks are unnecessary, > just remove them. > > Signed-off-by: Xu Wang <vulab@iscas.ac.cn> Sam convinced me to merge this patch as-is with out the additional cleanup of the driver. So Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de> I'll merge it into drm-misc-next. I'd still like to encourage you to send a patch for the other clk_* calls in au1100fb. Best regard Thomas > --- > drivers/video/fbdev/au1100fb.c | 6 ++---- > 1 file changed, 2 insertions(+), 4 deletions(-) > > diff --git a/drivers/video/fbdev/au1100fb.c b/drivers/video/fbdev/au1100fb.c > index 37a6512feda0..3659dfbb81c1 100644 > --- a/drivers/video/fbdev/au1100fb.c > +++ b/drivers/video/fbdev/au1100fb.c > @@ -560,8 +560,7 @@ int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state) > /* Blank the LCD */ > au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info); > > - if (fbdev->lcdclk) > - clk_disable(fbdev->lcdclk); > + clk_disable(fbdev->lcdclk); > > memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs)); > > @@ -577,8 +576,7 @@ int au1100fb_drv_resume(struct platform_device *dev) > > memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs)); > > - if (fbdev->lcdclk) > - clk_enable(fbdev->lcdclk); > + clk_enable(fbdev->lcdclk); > > /* Unblank the LCD */ > au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info); >
diff --git a/drivers/video/fbdev/au1100fb.c b/drivers/video/fbdev/au1100fb.c index 37a6512feda0..3659dfbb81c1 100644 --- a/drivers/video/fbdev/au1100fb.c +++ b/drivers/video/fbdev/au1100fb.c @@ -560,8 +560,7 @@ int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state) /* Blank the LCD */ au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info); - if (fbdev->lcdclk) - clk_disable(fbdev->lcdclk); + clk_disable(fbdev->lcdclk); memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs)); @@ -577,8 +576,7 @@ int au1100fb_drv_resume(struct platform_device *dev) memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs)); - if (fbdev->lcdclk) - clk_enable(fbdev->lcdclk); + clk_enable(fbdev->lcdclk); /* Unblank the LCD */ au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
Because clk_enable, clk_disable, clk_prepare, and clk_unprepare already checked NULL clock parameter, so the additional checks are unnecessary, just remove them. Signed-off-by: Xu Wang <vulab@iscas.ac.cn> --- drivers/video/fbdev/au1100fb.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)