Commit c008f1d3 authored Jun 12, 2015 by NeilBrown

md: don't return 0 from array_state_store



Returning zero from a 'store' function is bad.
The return value should be either len length of the string
or an error.

So use 'len' if 'err' is zero.

Fixes: 6791875e ("md: make reconfig_mutex optional for writes to md sysfs files.")
Signed-off-by: NeilBrown <neilb@suse.de>
Cc: stable@vger.kernel (v4.0+)

parent c65b99f0

drivers/md/md.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -3834,7 +3834,7 @@ array_state_store(struct mddev mddev, const char buf, size_t len)
		err = -EBUSY;
		}
		spin_unlock(&mddev->lock);
		return err;
		return err ?: len;
		}
		err = mddev_lock(mddev);
		if (err)