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Subject[PATCH 1/1] hso: fix problem with wrong status code sent by OPTION GTM601 during RING indication
Date
Hi Jan,

we are using a GTM601 modem (Firmware 1.7) for a while and have spotted an
issue that under some conditions the modem sends a packed wIndex over USB
that is rejected by the hso driver making troubles afterwards. Not rejecting makes
it work fine.

BR,
Nikolaus Schaller

---

From f5c7e15b61f2ce4fe3105ff914f6bfaf5d74af0d Mon Sep 17 00:00:00 2001
From: "H. Nikolaus Schaller" <hns@goldelico.com>
Date: Thu, 15 Nov 2012 14:40:57 +0100
Subject: [PATCH 1/1] hso: fix problem with wrong status code sent by OPTION
GTM601 during RING indication

It has been observed that the GTM601 with 1.7 firmware sometimes sends a value
wIndex that has bit 0x04 set instead of being reset as the code expects. So we
mask it for the error check.

See http://lists.goldelico.com/pipermail/gta04-owner/2012-February/001643.html

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: H. Nikolaus Schaller <hns@goldelico.de>
---
drivers/net/usb/hso.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c
index cba1d46..d146e26 100644
--- a/drivers/net/usb/hso.c
+++ b/drivers/net/usb/hso.c
@@ -1503,7 +1503,8 @@ static void tiocmget_intr_callback(struct urb *urb)
if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
serial_state_notification->bNotification != B_NOTIFICATION ||
le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
- le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
+ (le16_to_cpu(serial_state_notification->wIndex) & ~0x4) !=
+ W_INDEX ||
le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
dev_warn(&usb->dev,
"hso received invalid serial state notification\n");
--
1.7.7.4



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