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authorOded Gabbay <oded.gabbay@amd.com>2014-11-10 10:57:36 +0200
committerOded Gabbay <oded.gabbay@amd.com>2014-11-10 10:57:36 +0200
commita015c1e92639cd65ebb49350abdf5ad15bce4448 (patch)
tree4a21405a0291301bfcc20068dbb86d043d7f5007 /drivers/gpu/drm/radeon/cikd.h
parente7cc3dd48c7b0a4b2135a5a2145ad43a8192fa6a (diff)
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iommu/amd: fix accounting of device_state
This patch fixes a bug in the accounting of the device_state. In the current code, the device_state was put (decremented) too many times, which sometimes lead to the driver getting stuck permanently in put_device_state_wait(). That happen because the device_state->count would go below zero, which is never supposed to happen. The root cause is that the device_state was decremented in put_pasid_state() and put_pasid_state_wait() but also in all the functions that call those functions. Therefore, the device_state was decremented twice in each of these code paths. The fix is to decouple the device_state accounting from the pasid_state accounting - remove the call to put_device_state() from the put_pasid_state() and the put_pasid_state_wait()) Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/cikd.h')
0 files changed, 0 insertions, 0 deletions
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