From 84963048ca8093e0aa71ac90c2a5fe7af5f617c3 Mon Sep 17 00:00:00 2001 From: WANG Cong Date: Wed, 9 May 2007 02:33:36 -0700 Subject: [PATCH] nbd: check the return value of sysfs_create_file [akpm@linux-foundation.org: fix it] Signed-off-by: WANG Cong Cc: Paul Clements Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/block/nbd.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index 090796b..069ae39 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -366,20 +366,25 @@ static struct disk_attribute pid_attr = { .show = pid_show, }; -static void nbd_do_it(struct nbd_device *lo) +static int nbd_do_it(struct nbd_device *lo) { struct request *req; + int ret; BUG_ON(lo->magic != LO_MAGIC); lo->pid = current->pid; - sysfs_create_file(&lo->disk->kobj, &pid_attr.attr); + ret = sysfs_create_file(&lo->disk->kobj, &pid_attr.attr); + if (ret) { + printk(KERN_ERR "nbd: sysfs_create_file failed!"); + return ret; + } while ((req = nbd_read_stat(lo)) != NULL) nbd_end_request(req); sysfs_remove_file(&lo->disk->kobj, &pid_attr.attr); - return; + return 0; } static void nbd_clear_que(struct nbd_device *lo) @@ -569,7 +574,9 @@ static int nbd_ioctl(struct inode *inode, struct file *file, case NBD_DO_IT: if (!lo->file) return -EINVAL; - nbd_do_it(lo); + error = nbd_do_it(lo); + if (error) + return error; /* on return tidy up in case we have a signal */ /* Forcibly shutdown the socket causing all listeners * to error -- 2.7.4