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SubjectRe: [PATCH 2/3] drm/fb-helper: Check fb_deferred_io_init() return value
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Am 20.01.23 um 13:08 schrieb Javier Martinez Canillas:
> The fb_deferred_io_init() can fail and return an errno code but currently
> there is no check for its return value.
>
> Fix that and propagate to errno to the caller in the case of a failure.
>
> Fixes: d536540f304c ("drm/fb-helper: Add generic fbdev emulation .fb_probe function")
> Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>

The error cleanup in this function is already broken; just returning is
good enough for now.

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>

> ---
>
> drivers/gpu/drm/drm_fbdev_generic.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/drm_fbdev_generic.c b/drivers/gpu/drm/drm_fbdev_generic.c
> index 0a4c160e0e58..b2df8c03594c 100644
> --- a/drivers/gpu/drm/drm_fbdev_generic.c
> +++ b/drivers/gpu/drm/drm_fbdev_generic.c
> @@ -223,7 +223,9 @@ static int drm_fbdev_fb_probe(struct drm_fb_helper *fb_helper,
> fbi->flags |= FBINFO_VIRTFB | FBINFO_READS_FAST;
>
> fbi->fbdefio = &drm_fbdev_defio;
> - fb_deferred_io_init(fbi);
> + ret = fb_deferred_io_init(fbi);
> + if (ret)
> + return ret;
> } else {
> /* buffer is mapped for HW framebuffer */
> ret = drm_client_buffer_vmap(fb_helper->buffer, &map);

--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev
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