drm/imagination: Hold drm_gem_gpuva lock for unmap

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commit a5c4c3ba95 upstream.

Avoid a warning from drm_gem_gpuva_assert_lock_held in drm_gpuva_unlink.

The Imagination driver uses the GEM object reservation lock to protect
the gpuva list, but the GEM object was not always known in the code
paths that ended up calling drm_gpuva_unlink. When the GEM object isn't
known, it is found by calling drm_gpuva_find to lookup the object
associated with a given virtual address range, or by calling
drm_gpuva_find_first when removing all mappings.

Cc: stable@vger.kernel.org
Fixes: 4bc736f890 ("drm/imagination: vm: make use of GPUVM's drm_exec helper")
Signed-off-by: Brendan King <brendan.king@imgtec.com>
Reviewed-by: Matt Coster <matt.coster@imgtec.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250226-hold-drm_gem_gpuva-lock-for-unmap-v2-1-3fdacded227f@imgtec.com
Signed-off-by: Matt Coster <matt.coster@imgtec.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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This commit is contained in:

Brendan King 2025-02-26 15:43:06 +00:00 • committed by Greg Kroah-Hartman

parent d993ae7360

commit 58e37cfcb1

3 changed files with 115 additions and 28 deletions

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6

drivers/gpu/drm/imagination/pvr_fw_meta.c

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134

drivers/gpu/drm/imagination/pvr_vm.c

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3

drivers/gpu/drm/imagination/pvr_vm.h

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