[Patch v4 2/4] drm/amdkfd: show warning when kfd is locked

[Rajneesh Bhardwaj]

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 at amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling at amd.com>
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj at amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
index 275f79ab0900..86b919d82129 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -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;
 	}
-- 
2.17.1