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| author | Linus Walleij <linus.walleij@linaro.org> | 2019-09-05 11:40:54 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2019-09-05 11:40:54 +0200 |
| commit | 151a41014bff92f353263cadc051435dc9c3258e (patch) | |
| tree | aa082a0745edd5b7051668f455dfc0ee1e4a9de0 /drivers/s390/virtio/virtio_ccw.c | |
| parent | ae0755b56da9db4190288155ea884331993ed51b (diff) | |
| parent | 089cf7f6ecb266b6a4164919a2e69bd2f938374a (diff) | |
Merge tag 'v5.3-rc7' into devel
Linux 5.3-rc7
Diffstat (limited to 'drivers/s390/virtio/virtio_ccw.c')
| -rw-r--r-- | drivers/s390/virtio/virtio_ccw.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/s390/virtio/virtio_ccw.c b/drivers/s390/virtio/virtio_ccw.c index 1a55e5942d36..957889a42d2e 100644 --- a/drivers/s390/virtio/virtio_ccw.c +++ b/drivers/s390/virtio/virtio_ccw.c @@ -145,6 +145,8 @@ struct airq_info { struct airq_iv *aiv; }; static struct airq_info *airq_areas[MAX_AIRQ_AREAS]; +static DEFINE_MUTEX(airq_areas_lock); + static u8 *summary_indicators; static inline u8 *get_summary_indicator(struct airq_info *info) @@ -265,9 +267,11 @@ static unsigned long get_airq_indicator(struct virtqueue *vqs[], int nvqs, unsigned long bit, flags; for (i = 0; i < MAX_AIRQ_AREAS && !indicator_addr; i++) { + mutex_lock(&airq_areas_lock); if (!airq_areas[i]) airq_areas[i] = new_airq_info(i); info = airq_areas[i]; + mutex_unlock(&airq_areas_lock); if (!info) return 0; write_lock_irqsave(&info->lock, flags); |