From: Rupesh Gujare <rupesh.gujare@atmel.com>
Date: Wed, 28 Aug 2013 11:43:16 +0000 (+0100)
Subject: staging: ozwpan: Return error, if PD is not connected.
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=8503f9016f01d01b4c3a1e8c9848d4f564e71bd1;p=linux-beck.git

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>
---

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) {