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-rw-r--r--drivers/isdn/gigaset/usb-gigaset.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/isdn/gigaset/usb-gigaset.c b/drivers/isdn/gigaset/usb-gigaset.c
index 76dbb20..f65cf7db 100644
--- a/drivers/isdn/gigaset/usb-gigaset.c
+++ b/drivers/isdn/gigaset/usb-gigaset.c
@@ -39,7 +39,8 @@ MODULE_PARM_DESC(cidmode, "Call-ID mode");
#define GIGASET_MODULENAME "usb_gigaset"
#define GIGASET_DEVNAME "ttyGU"
-#define IF_WRITEBUF 2000 /* arbitrary limit */
+/* length limit according to Siemens 3070usb-protokoll.doc ch. 2.1 */
+#define IF_WRITEBUF 264
/* Values for the Gigaset M105 Data */
#define USB_M105_VENDOR_ID 0x0681
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