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thunderbolt: Use spinlock in NHI serialization

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This is needed because ring polling functionality can be called from
atomic contexts when networking and other high-speed traffic is
transferred 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 13:38:40 +03:00 • committed by David S. Miller
parent 22b7de1000
commit 59120e0610
2 changed files with 42 additions and 35 deletions
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2
include/linux/thunderbolt.h
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@ -415,7 +415,7 @@ static inline struct tb_xdomain *tb_service_parent(struct tb_service *svc)
* @hop_count: Number of rings (end point hops) supported by NHI.
*/
struct tb_nhi {
struct mutex lock;
spinlock_t lock;
struct pci_dev *pdev;
void __iomem *iobase;
struct tb_ring **tx_rings;