From 22b7de1000e66d739c431d6be4e7e97c69fa7c98 Mon Sep 17 00:00:00 2001
From: Mika Westerberg <mika.westerberg@linux.intel.com>
Date: Mon, 2 Oct 2017 13:38:39 +0300
Subject: 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>
---
 include/linux/thunderbolt.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'include/linux/thunderbolt.h')

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;
-- 
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