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-rw-r--r--fs/block_dev.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 7c727523bc54..99e0ae1a4c78 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1206,8 +1206,16 @@ static long block_ioctl(struct file *file, unsigned cmd, unsigned long arg)
{
struct block_device *bdev = I_BDEV(file->f_mapping->host);
fmode_t mode = file->f_mode;
+
+ /*
+ * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
+ * to updated it before every ioctl.
+ */
if (file->f_flags & O_NDELAY)
- mode |= FMODE_NDELAY_NOW;
+ mode |= FMODE_NDELAY;
+ else
+ mode &= ~FMODE_NDELAY;
+
return blkdev_ioctl(bdev, mode, cmd, arg);
}