fbdev/deferred-io: Test smem_start for I/O memory

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Test smem_start before looking up pages from its value. Return
NULL if it is unset. This will result in a SIGBUS signal.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240419083331.7761-6-tzimmermann@suse.de

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Thomas Zimmermann 2024-04-19 10:28:58 +02:00

parent abc79a0e0a

commit dcaefc8239

1 changed files with 2 additions and 2 deletions

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4

drivers/video/fbdev/core/fb_defio.c

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