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drm/amdkfd: show warning when kfd is locked 

During system suspend the kfd driver aquires a lock that prohibits
further kfd actions unless the gpu is resumed. This adds some info which
can be useful while debugging.

Reviewed-by: Oak Zeng <oak.zeng@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Rajneesh Bhardwaj 2020-01-21 14:34:51 -05:00 committed by Alex Deucher
parent 70bedd68e7
commit 3c1224c02e
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
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@ -127,6 +127,8 @@ static int kfd_open(struct inode *inode, struct file *filep)
return PTR_ERR(process);
if (kfd_is_locked()) {
dev_dbg(kfd_device, "kfd is locked!\n"
"process %d unreferenced", process->pasid);
kfd_unref_process(process);
return -EAGAIN;
}