[PATCH 4.2.y-ckt 245/305] [media] airspy: increase USB control message buffer size

[Kamal Mostafa]

4.2.8-ckt2 -stable review patch.  If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: Antti Palosaari <crope at iki.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 at gmail.com>
Signed-off-by: Antti Palosaari <crope at iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab at osg.samsung.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/media/usb/airspy/airspy.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/usb/airspy/airspy.c b/drivers/media/usb/airspy/airspy.c
index 4069234..a50750c 100644
--- 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 */
-- 
1.9.1