Create a simple helper that handles the common case of calling __rbd_refresh_header() while holding the ctl_mutex.
Signed-off-by: Alex Elder <[email protected]> --- drivers/block/rbd.c | 25 +++++++++++++++---------- 1 file changed, 15 insertions(+), 10 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 31be4ca..94d0745 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -240,7 +240,7 @@ static void rbd_put_dev(struct rbd_device *rbd_dev) put_device(&rbd_dev->dev); } -static int __rbd_refresh_header(struct rbd_device *rbd_dev, u64 *hver); +static int rbd_refresh_header(struct rbd_device *rbd_dev, u64 *hver); static int rbd_open(struct block_device *bdev, fmode_t mode) { @@ -1222,9 +1222,7 @@ static void rbd_watch_cb(u64 ver, u64 notify_id, u8 opcode, void *data) dout("rbd_watch_cb %s notify_id=%lld opcode=%d\n", rbd_dev->header_name, notify_id, (int) opcode); - mutex_lock_nested(&ctl_mutex, SINGLE_DEPTH_NESTING); - rc = __rbd_refresh_header(rbd_dev, &hver); - mutex_unlock(&ctl_mutex); + rc = rbd_refresh_header(rbd_dev, &hver); if (rc) pr_warning(RBD_DRV_NAME "%d got notification but failed to " " update snaps: %d\n", rbd_dev->major, rc); @@ -1746,6 +1744,17 @@ static int __rbd_refresh_header(struct rbd_device *rbd_dev, u64 *hver) return ret; } +static int rbd_refresh_header(struct rbd_device *rbd_dev, u64 *hver) +{ + int ret; + + mutex_lock_nested(&ctl_mutex, SINGLE_DEPTH_NESTING); + ret = __rbd_refresh_header(rbd_dev, hver); + mutex_unlock(&ctl_mutex); + + return ret; +} + static int rbd_init_disk(struct rbd_device *rbd_dev) { struct gendisk *disk; @@ -1899,9 +1908,7 @@ static ssize_t rbd_image_refresh(struct device *dev, struct rbd_device *rbd_dev = dev_to_rbd_dev(dev); int ret; - mutex_lock_nested(&ctl_mutex, SINGLE_DEPTH_NESTING); - ret = __rbd_refresh_header(rbd_dev, NULL); - mutex_unlock(&ctl_mutex); + ret = rbd_refresh_header(rbd_dev, NULL); return ret < 0 ? ret : size; } @@ -2191,9 +2198,7 @@ static int rbd_init_watch_dev(struct rbd_device *rbd_dev) do { ret = rbd_req_sync_watch(rbd_dev); if (ret == -ERANGE) { - mutex_lock_nested(&ctl_mutex, SINGLE_DEPTH_NESTING); - rc = __rbd_refresh_header(rbd_dev, NULL); - mutex_unlock(&ctl_mutex); + rc = rbd_refresh_header(rbd_dev, NULL); if (rc < 0) return rc; } -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
