linux-kernel - [PATCH 4/4] staging: ozwpan: Return error, if PD is not connected.

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Date:	Tue, 27 Aug 2013 16:53:43 +0100
From:	Rupesh Gujare <rupesh.gujare@...el.com>
To:	<devel@...uxdriverproject.org>
CC:	<linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<gregkh@...uxfoundation.org>
Subject: [PATCH 4/4] 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@...el.com>
---
 drivers/staging/ozwpan/ozcdev.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/staging/ozwpan/ozcdev.c b/drivers/staging/ozwpan/ozcdev.c
index 03b41ee..22cb2ae 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 -1;
+	if (!(pd->state & OZ_PD_S_CONNECTED))
+		return -ENXIO;
 	eb = &pd->elt_buff;
 	ei = oz_elt_info_alloc(eb);
 	if (ei == NULL) {
-- 
1.7.9.5

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