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-rw-r--r--fs/block_dev.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c
index bb715b2..93d088f 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1740,6 +1740,8 @@ static int blkdev_open(struct inode * inode, struct file * filp)
*/
filp->f_flags |= O_LARGEFILE;
+ filp->f_mode |= FMODE_NOWAIT;
+
if (filp->f_flags & O_NDELAY)
filp->f_mode |= FMODE_NDELAY;
if (filp->f_flags & O_EXCL)
@@ -1892,6 +1894,9 @@ ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from)
if (iocb->ki_pos >= size)
return -ENOSPC;
+ if ((iocb->ki_flags & (IOCB_NOWAIT | IOCB_DIRECT)) == IOCB_NOWAIT)
+ return -EOPNOTSUPP;
+
iov_iter_truncate(from, size - iocb->ki_pos);
blk_start_plug(&plug);
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