1 files changed, 7 insertions, 0 deletions

diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index a84faa110bcd..808c554e773f 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -334,16 +334,22 @@ mext_out:
         case FITRIM:
         {
                 struct super_block *sb = inode->i_sb;
+                struct request_queue *q = bdev_get_queue(sb->s_bdev);
                 struct fstrim_range range;
                 int ret = 0;
 
                 if (!capable(CAP_SYS_ADMIN))
                         return -EPERM;
 
+                if (!blk_queue_discard(q))
+                        return -EOPNOTSUPP;
+
                 if (copy_from_user(&range, (struct fstrim_range *)arg,
                     sizeof(range)))
                         return -EFAULT;
 
+                range.minlen = max((unsigned int)range.minlen,
+                                   q->limits.discard_granularity);
                 ret = ext4_trim_fs(sb, &range);
                 if (ret < 0)
                         return ret;
@@ -421,6 +427,7 @@ long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
                 return err;
         }
         case EXT4_IOC_MOVE_EXT:
+        case FITRIM:
                 break;
         default:
                 return -ENOIOCTLCMD;