[PATCH 4/9] loop: don't call loop_lookup before adding a loop device

[Christoph Hellwig <hch@xxxxxx>]

loop_add returns the right error if the slot wasn't available.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
 drivers/block/loop.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 8392722d0e12..b1e7e420563b 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -2219,14 +2219,12 @@ static int loop_lookup(struct loop_device **l, int i)
 static void loop_probe(dev_t dev)
 {
 	int idx = MINOR(dev) >> part_shift;
-	struct loop_device *lo;
 
 	if (max_loop && idx >= max_loop)
 		return;
 
 	mutex_lock(&loop_ctl_mutex);
-	if (loop_lookup(&lo, idx) < 0)
-		loop_add(idx);
+	loop_add(idx);
 	mutex_unlock(&loop_ctl_mutex);
 }
 
@@ -2243,11 +2241,6 @@ static long loop_control_ioctl(struct file *file, unsigned int cmd,
 	ret = -ENOSYS;
 	switch (cmd) {
 	case LOOP_CTL_ADD:
-		ret = loop_lookup(&lo, parm);
-		if (ret >= 0) {
-			ret = -EEXIST;
-			break;
-		}
 		ret = loop_add(parm);
 		break;
 	case LOOP_CTL_REMOVE:
-- 
2.30.2