Since 'sysfs_create_file' is declared with attribute warn_unused_result, we must always check its return value carefully.
Signed-off-by: WANG Cong <[email protected]>
---
--- linux-2.6.21-rc7-mm2/drivers/block/nbd.c.orig 2007-04-27 17:27:47.000000000 +0800
+++ linux-2.6.21-rc7-mm2/drivers/block/nbd.c 2007-04-27 17:47:32.000000000 +0800
@@ -373,7 +373,10 @@ static void nbd_do_it(struct nbd_device
BUG_ON(lo->magic != LO_MAGIC);
lo->pid = current->pid;
- sysfs_create_file(&lo->disk->kobj, &pid_attr.attr);
+ if (sysfs_create_file(&lo->disk->kobj, &pid_attr.attr)) {
+ printk(KERN_ERR "nbd: sysfs_create_file failed!");
+ return;
+ }
while ((req = nbd_read_stat(lo)) != NULL)
nbd_end_request(req);
-
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