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zd1211rw: reset device when CR_BCN_FIFO_SEMAPHORE freezes in beacon setup

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When driver fails to acquire device semaphore lock, device usually
freezes soon afterwards. So failing to acquire lock indicates us that
not everything is going right in device/fw. So reset device when
this happens.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Jussi Kivilinna 2011-01-31 20:50:02 +02:00 committed by John W. Linville
parent a0fd751f09
commit 3985a46543
1 changed files with 12 additions and 1 deletions
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13
drivers/net/wireless/zd1211rw/zd_mac.c
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@ -703,7 +703,7 @@ static int zd_mac_config_beacon(struct ieee80211_hw *hw, struct sk_buff *beacon)
dev_err(zd_mac_dev(mac),
"Giving up beacon config.\n");
r = -ETIMEDOUT;
goto release_sema;
goto reset_device;
}
}
msleep(20);
@ -770,6 +770,17 @@ out:
mutex_unlock(&mac->chip.mutex);
kfree(ioreqs);
return r;
reset_device:
mutex_unlock(&mac->chip.mutex);
kfree(ioreqs);
/* semaphore stuck, reset device to avoid fw freeze later */
dev_warn(zd_mac_dev(mac), "CR_BCN_FIFO_SEMAPHORE stuck, "
"reseting device...");
usb_queue_reset_device(mac->chip.usb.intf);
return r;
}
static int fill_ctrlset(struct zd_mac *mac,