| Message ID | 20230428122452.4856-3-tzimmermann@suse.de (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | drm,fbdev: Use fbdev's I/O helpers | expand |
Thomas Zimmermann <tzimmermann@suse.de> writes: > Use info->screen_buffer when reading and writing framebuffers in > system memory. It's the correct pointer for this address space. > > The struct fb_info has a union to store the framebuffer memory. This can > either be info->screen_base if the framebuffer is stored in I/O memory, > or info->screen_buffer if the framebuffer is stored in system memory. > > As the driver operates on the latter address space, it is wrong to use > .screen_base and .screen_buffer must be used instead. This also gets > rid of casting needed due to not using the correct data type. > > Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> > --- Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
diff --git a/drivers/auxdisplay/ht16k33.c b/drivers/auxdisplay/ht16k33.c index 02425991c159..edaf92b7ea77 100644 --- a/drivers/auxdisplay/ht16k33.c +++ b/drivers/auxdisplay/ht16k33.c @@ -640,7 +640,7 @@ static int ht16k33_fbdev_probe(struct device *dev, struct ht16k33_priv *priv, INIT_DELAYED_WORK(&priv->work, ht16k33_fb_update); fbdev->info->fbops = &ht16k33_fb_ops; - fbdev->info->screen_base = (char __iomem *) fbdev->buffer; + fbdev->info->screen_buffer = fbdev->buffer; fbdev->info->screen_size = HT16K33_FB_SIZE; fbdev->info->fix = ht16k33_fb_fix; fbdev->info->var = ht16k33_fb_var;
Use info->screen_buffer when reading and writing framebuffers in system memory. It's the correct pointer for this address space. The struct fb_info has a union to store the framebuffer memory. This can either be info->screen_base if the framebuffer is stored in I/O memory, or info->screen_buffer if the framebuffer is stored in system memory. As the driver operates on the latter address space, it is wrong to use .screen_base and .screen_buffer must be used instead. This also gets rid of casting needed due to not using the correct data type. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> --- drivers/auxdisplay/ht16k33.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)