drm/radeon: Read the VRAM VBIOS signature with readb()

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igp_read_bios_from_vram() checked bios[0]/bios[1] with a plain
__iomem load, which faults on sparc64 before the copy runs at all.
radeon_read_bios() already reads its two signature bytes with
readb() ahead of its own copy; use the same accessor here, keeping
the check before the allocation.

Fixes: b442962a9e ("drm/radeon/kms: add support for "Surround View"")
Signed-off-by: Imre Kaloz <kaloz@kernel.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 09155b8932)
Cc: stable@vger.kernel.org

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Imre Kaloz 2026-09-27 16:55:04 +02:00 • committed by Alex Deucher

parent 217f64f348

commit de1eab13ef

1 changed files with 5 additions and 1 deletions

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drivers/gpu/drm/radeon/radeon_bios.c

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