[PATCH] USBATM: change the default speedtouch iso altsetting

The maximum possible bandwidth for a speedtouch modem is about 7Mbaud.
You can only get this by using isochronous urbs (enable_isoc=1) and
altsetting 3.  With the current default altsetting of 2, the modem
maxes out at about 4Mbaud.  So change the default altsetting to 3
when using isochronous urbs.  It would be nice to base the altsetting
on the detected line speed, but that's hard given the current design.

Signed-off-by: Duncan Sands <baldrick@free.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/atm/speedtch.c b/drivers/usb/atm/speedtch.c
index 7860c8a..956b7a1 100644 (file)
--- a/drivers/usb/atm/speedtch.c
+++ b/drivers/usb/atm/speedtch.c
@@ -69,7 +69,7 @@ static const char speedtch_driver_name[] = "speedtch";
 #define RESUBMIT_DELAY         1000    /* milliseconds */
 
 #define DEFAULT_BULK_ALTSETTING        1
-#define DEFAULT_ISOC_ALTSETTING        2
+#define DEFAULT_ISOC_ALTSETTING        3
 #define DEFAULT_DL_512_FIRST   0
 #define DEFAULT_ENABLE_ISOC    0
 #define DEFAULT_SW_BUFFERING   0