linux-kernel - [PATCH 4.1 057/127] [media] airspy: increase USB control message buffer size

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Date:	Wed, 27 Jan 2016 10:13:41 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Benjamin Vernoux <bvernoux@...il.com>,
	Antti Palosaari <crope@....fi>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>
Subject: [PATCH 4.1 057/127] [media] airspy: increase USB control message buffer size

4.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Antti Palosaari <crope@....fi>

commit aa0850e1d56623845b46350ffd971afa9241886d upstream.

Driver requested device firmware version string during probe using
only 24 byte long buffer. That buffer is too small for newer firmware
versions, which causes device firmware hang - device stops responding
to any commands after that. Increase buffer size to 128 which should
be enough for any current and future version strings.

Link: https://github.com/airspy/host/issues/27

Reported-by: Benjamin Vernoux <bvernoux@...il.com>
Signed-off-by: Antti Palosaari <crope@....fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@....samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/media/usb/airspy/airspy.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/media/usb/airspy/airspy.c
+++ b/drivers/media/usb/airspy/airspy.c
@@ -132,7 +132,7 @@ struct airspy {
 	int            urbs_submitted;
 
 	/* USB control message buffer */
-	#define BUF_SIZE 24
+	#define BUF_SIZE 128
 	u8 buf[BUF_SIZE];
 
 	/* Current configuration */