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-rw-r--r--block/compat_ioctl.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/block/compat_ioctl.c b/block/compat_ioctl.c
index d43e6087badc..67eb93cff699 100644
--- a/block/compat_ioctl.c
+++ b/block/compat_ioctl.c
@@ -722,8 +722,14 @@ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
struct backing_dev_info *bdi;
loff_t size;
+ /*
+ * 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;
switch (cmd) {
case HDIO_GETGEO: