diff options
| -rw-r--r-- | block/bsg.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/block/bsg.c b/block/bsg.c index 8917c5174dc2..d8e0cb8dd6be 100644 --- a/block/bsg.c +++ b/block/bsg.c @@ -705,6 +705,7 @@ static struct bsg_device *bsg_alloc_device(void) static int bsg_put_device(struct bsg_device *bd) { int ret = 0; + struct device *dev = bd->queue->bsg_dev.dev; mutex_lock(&bsg_mutex); @@ -730,6 +731,7 @@ static int bsg_put_device(struct bsg_device *bd) kfree(bd); out: mutex_unlock(&bsg_mutex); + put_device(dev); return ret; } @@ -789,21 +791,27 @@ static struct bsg_device *bsg_get_device(struct inode *inode, struct file *file) struct bsg_device *bd; struct bsg_class_device *bcd; - bd = __bsg_get_device(iminor(inode)); - if (bd) - return bd; - /* * find the class device */ mutex_lock(&bsg_mutex); bcd = idr_find(&bsg_minor_idr, iminor(inode)); + if (bcd) + get_device(bcd->dev); mutex_unlock(&bsg_mutex); if (!bcd) return ERR_PTR(-ENODEV); - return bsg_add_device(inode, bcd->queue, file); + bd = __bsg_get_device(iminor(inode)); + if (bd) + return bd; + + bd = bsg_add_device(inode, bcd->queue, file); + if (IS_ERR(bd)) + put_device(bcd->dev); + + return bd; } static int bsg_open(struct inode *inode, struct file *file) @@ -942,7 +950,6 @@ void bsg_unregister_queue(struct request_queue *q) class_device_unregister(bcd->class_dev); put_device(bcd->dev); bcd->class_dev = NULL; - bcd->dev = NULL; mutex_unlock(&bsg_mutex); } EXPORT_SYMBOL_GPL(bsg_unregister_queue); |