drm/amdgpu: ensure no_hw_access is visible before MMIO

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commit 31b153315b upstream.

Add a full memory barrier after clearing no_hw_access in
amdgpu_device_mode1_reset() so subsequent PCI state restore
access cannot observe stale state on other CPUs.

Fixes: 7edb503fe4 ("drm/amd/pm: Disable MMIO access during SMU Mode 1 reset")
Signed-off-by: Perry Yuan <perry.yuan@amd.com>
Reviewed-by: Yifan Zhang <yifan1.zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: Simon Liebold <simonlie@amazon.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Perry Yuan 2026-01-28 13:54:31 +08:00 • committed by Greg Kroah-Hartman

parent 3428dc5520

commit 1051eb2f53

1 changed files with 3 additions and 0 deletions

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drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

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