forked from Minki/linux
Btrfs: cleanup fs/btrfs/super.c::btrfs_control_ioctl()
- Remove the unused local variable 'len'; - Check return value of kmalloc(). Signed-off-by: Wang Cong <wangcong@zeuux.org> Signed-off-by: Chris Mason <chris.mason@oracle.com>
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@ -583,17 +583,18 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd,
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struct btrfs_ioctl_vol_args *vol;
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struct btrfs_fs_devices *fs_devices;
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int ret = -ENOTTY;
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int len;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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vol = kmalloc(sizeof(*vol), GFP_KERNEL);
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if (!vol)
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return -ENOMEM;
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if (copy_from_user(vol, (void __user *)arg, sizeof(*vol))) {
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ret = -EFAULT;
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goto out;
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}
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len = strnlen(vol->name, BTRFS_PATH_NAME_MAX);
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switch (cmd) {
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case BTRFS_IOC_SCAN_DEV:
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