diff options
| author | Jakub Kicinski <kuba@kernel.org> | 2021-10-28 10:43:58 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-10-28 10:43:58 -0700 |
| commit | 7df621a3eea6761bc83e641aaca6963210c7290d (patch) | |
| tree | 65ab9d0d1894153ceefcb6b5a1c25b8d17c466fd /drivers/vdpa | |
| parent | f2edaa4ad5d51371709196f2c258fbe875962dee (diff) | |
| parent | 411a44c24a561e449b592ff631b7ae321f1eb559 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
include/net/sock.h
7b50ecfcc6cd ("net: Rename ->stream_memory_read to ->sock_is_readable")
4c1e34c0dbff ("vsock: Enable y2038 safe timeval for timeout")
drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
0daa55d033b0 ("octeontx2-af: cn10k: debugfs for dumping LMTST map table")
e77bcdd1f639 ("octeontx2-af: Display all enabled PF VF rsrc_alloc entries.")
Adjacent code addition in both cases, keep both.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/vdpa')
| -rw-r--r-- | drivers/vdpa/vdpa_user/vduse_dev.c | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c index 26e3d90d1e7c..841667a896dd 100644 --- a/drivers/vdpa/vdpa_user/vduse_dev.c +++ b/drivers/vdpa/vdpa_user/vduse_dev.c @@ -80,6 +80,7 @@ struct vduse_dev { struct vdpa_callback config_cb; struct work_struct inject; spinlock_t irq_lock; + struct rw_semaphore rwsem; int minor; bool broken; bool connected; @@ -410,6 +411,8 @@ static void vduse_dev_reset(struct vduse_dev *dev) if (domain->bounce_map) vduse_domain_reset_bounce_map(domain); + down_write(&dev->rwsem); + dev->status = 0; dev->driver_features = 0; dev->generation++; @@ -443,6 +446,8 @@ static void vduse_dev_reset(struct vduse_dev *dev) flush_work(&vq->inject); flush_work(&vq->kick); } + + up_write(&dev->rwsem); } static int vduse_vdpa_set_vq_address(struct vdpa_device *vdpa, u16 idx, @@ -885,6 +890,23 @@ static void vduse_vq_irq_inject(struct work_struct *work) spin_unlock_irq(&vq->irq_lock); } +static int vduse_dev_queue_irq_work(struct vduse_dev *dev, + struct work_struct *irq_work) +{ + int ret = -EINVAL; + + down_read(&dev->rwsem); + if (!(dev->status & VIRTIO_CONFIG_S_DRIVER_OK)) + goto unlock; + + ret = 0; + queue_work(vduse_irq_wq, irq_work); +unlock: + up_read(&dev->rwsem); + + return ret; +} + static long vduse_dev_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { @@ -966,8 +988,7 @@ static long vduse_dev_ioctl(struct file *file, unsigned int cmd, break; } case VDUSE_DEV_INJECT_CONFIG_IRQ: - ret = 0; - queue_work(vduse_irq_wq, &dev->inject); + ret = vduse_dev_queue_irq_work(dev, &dev->inject); break; case VDUSE_VQ_SETUP: { struct vduse_vq_config config; @@ -1053,9 +1074,8 @@ static long vduse_dev_ioctl(struct file *file, unsigned int cmd, if (index >= dev->vq_num) break; - ret = 0; index = array_index_nospec(index, dev->vq_num); - queue_work(vduse_irq_wq, &dev->vqs[index].inject); + ret = vduse_dev_queue_irq_work(dev, &dev->vqs[index].inject); break; } default: @@ -1136,6 +1156,7 @@ static struct vduse_dev *vduse_dev_create(void) INIT_LIST_HEAD(&dev->send_list); INIT_LIST_HEAD(&dev->recv_list); spin_lock_init(&dev->irq_lock); + init_rwsem(&dev->rwsem); INIT_WORK(&dev->inject, vduse_dev_irq_inject); init_waitqueue_head(&dev->waitq); |