nbd: check the return value of sysfs_create_file
[akpm@linux-foundation.org: fix it] Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com> Cc: Paul Clements <paul.clements@steeleye.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -366,20 +366,25 @@ static struct disk_attribute pid_attr = {
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.show = pid_show,
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};
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static void nbd_do_it(struct nbd_device *lo)
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static int nbd_do_it(struct nbd_device *lo)
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{
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struct request *req;
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int ret;
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BUG_ON(lo->magic != LO_MAGIC);
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lo->pid = current->pid;
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sysfs_create_file(&lo->disk->kobj, &pid_attr.attr);
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ret = sysfs_create_file(&lo->disk->kobj, &pid_attr.attr);
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if (ret) {
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printk(KERN_ERR "nbd: sysfs_create_file failed!");
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return ret;
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}
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while ((req = nbd_read_stat(lo)) != NULL)
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nbd_end_request(req);
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sysfs_remove_file(&lo->disk->kobj, &pid_attr.attr);
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return;
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return 0;
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}
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static void nbd_clear_que(struct nbd_device *lo)
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@ -569,7 +574,9 @@ static int nbd_ioctl(struct inode *inode, struct file *file,
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case NBD_DO_IT:
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if (!lo->file)
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return -EINVAL;
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nbd_do_it(lo);
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error = nbd_do_it(lo);
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if (error)
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return error;
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/* on return tidy up in case we have a signal */
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/* Forcibly shutdown the socket causing all listeners
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* to error
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