[media] airspy: increase USB control message buffer size

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
Cc: <stable@vger.kernel.org> # 3.17+
Reported-by: Benjamin Vernoux <bvernoux@gmail.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

diff --git a/drivers/media/usb/airspy/airspy.c b/drivers/media/usb/airspy/airspy.c
index fcbb49757614487aa0a88e2740bc0dcd4ff73236..565a59310747680858bb2bf30543e05becd579a0 100644 (file)
--- a/drivers/media/usb/airspy/airspy.c
+++ b/drivers/media/usb/airspy/airspy.c
@@ -134,7 +134,7 @@ struct airspy {
        int            urbs_submitted;
 
        /* USB control message buffer */
-       #define BUF_SIZE 24
+       #define BUF_SIZE 128
        u8 buf[BUF_SIZE];
 
        /* Current configuration */