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 <mika.westerberg@linux.intel.com>
Reviewed-by: Michael Jamet <michael.jamet@intel.com>
Reviewed-by: Yehezkel Bernat <yehezkel.bernat@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/thunderbolt.h b/include/linux/thunderbolt.h
index e3b9af7..cf9e42d 100644
--- a/include/linux/thunderbolt.h
+++ b/include/linux/thunderbolt.h
@@ -448,7 +448,7 @@
* @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;