fbmem: Check virtual screen sizes in fb_set_var()
commit 6c11df58fd1ac0aefcb3b227f72769272b939e56 upstream. Verify that the fbdev or drm driver correctly adjusted the virtual screen sizes. On failure report the failing driver and reject the screen size change. Signed-off-by:Helge Deller <deller@gmx.de> Reviewed-by:
Geert Uytterhoeven <geert@linux-m68k.org> Cc: stable@vger.kernel.org # v5.4+ Signed-off-by:
Hugo SIMELIERE <hsimeliere.opensource@witekio.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> (cherry picked from commit f453f32f13320137f2317c0ad7ae1c20508effca) Signed-off-by:
Vegard Nossum <vegard.nossum@oracle.com>
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