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thunderbolt: Use spinlock in ring serialization

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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>
This commit is contained in:
Mika Westerberg 2017-10-02 13:38:39 +03:00 • committed by David S. Miller
parent 2a91ec63f8
commit 22b7de1000
2 changed files with 15 additions and 13 deletions
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2
include/linux/thunderbolt.h
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@ -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;