thunderbolt: Use spinlock in ring serialization

This makes it possible to enqueue frames also from atomic context which
is needed for example, when networking packets are sent over a
Thunderbolt cable.

Signed-off-by: Mika Westerberg <[email protected]>
Reviewed-by: Michael Jamet <[email protected]>
Reviewed-by: Yehezkel Bernat <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/linux/thunderbolt.h b/include/linux/thunderbolt.h
index e3b9af7be0ad..cf9e42db780f 100644
--- a/include/linux/thunderbolt.h
+++ b/include/linux/thunderbolt.h
@@ -448,7 +448,7 @@ struct tb_nhi {
  * @eof_mask: Bit mask used to detect end of frame PDF
  */
 struct tb_ring {
-	struct mutex lock;
+	spinlock_t lock;
 	struct tb_nhi *nhi;
 	int size;
 	int hop;