On 2020-01-27 20:29, Rajneesh Bhardwaj wrote:
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.
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@xxxxxxx>
---
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 1aebda4bbbe7..081cc5f40d18 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_warn(kfd_device, "kfd is locked!\n"
+ "process %d unreferenced", process->pasid);
If this is for debugging, make it dev_dbg. Printing warnings like this
usually confuses people reporting completely unrelated problems that
aren't even kernel problems at all. "Look, I found a warning in the
kernel log. It must be a kernel problem."
Regards,
Felix
kfd_unref_process(process);
return -EAGAIN;
}
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