staging: ozwpan: Return error, if PD is not connected.

Return error if we receive write(), while PD is not connected.

Signed-off-by: Rupesh Gujare <rupesh.gujare@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/staging/ozwpan/ozcdev.c b/drivers/staging/ozwpan/ozcdev.c
index 50722eab7e1f..6ccb64fb0786 100644
--- a/drivers/staging/ozwpan/ozcdev.c
+++ b/drivers/staging/ozwpan/ozcdev.c
@@ -162,6 +162,8 @@ static ssize_t oz_cdev_write(struct file *filp, const char __user *buf,
         spin_unlock_bh(&g_cdev.lock);
         if (pd == NULL)
                 return -ENXIO;
+        if (!(pd->state & OZ_PD_S_CONNECTED))
+                return -EAGAIN;
         eb = &pd->elt_buff;
         ei = oz_elt_info_alloc(eb);
         if (ei == NULL) {