From 1a397696536e896e7d763c0c38f3ae3e588b5d52 Mon Sep 17 00:00:00 2001
From: Ivo van Doorn <ivdoorn@gmail.com>
Date: Mon, 11 Oct 2010 15:39:04 +0200
Subject: [PATCH] rt2x00: Don't perform watchdog checks on empty queue
The currently used watchdog functions cannot be applied
to empty queues.
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Acked-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
drivers/net/wireless/rt2x00/rt2x00usb.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/net/wireless/rt2x00/rt2x00usb.c b/drivers/net/wireless/rt2x00/rt2x00usb.c
index 769c53451b21..89d77f55d76c 100644
--- a/drivers/net/wireless/rt2x00/rt2x00usb.c
+++ b/drivers/net/wireless/rt2x00/rt2x00usb.c
@@ -363,10 +363,12 @@ void rt2x00usb_watchdog(struct rt2x00_dev *rt2x00dev)
struct data_queue *queue;
tx_queue_for_each(rt2x00dev, queue) {
- if (rt2x00queue_dma_timeout(queue))
- rt2x00usb_watchdog_tx_dma(queue);
- if (rt2x00queue_timeout(queue))
- rt2x00usb_watchdog_tx_status(queue);
+ if (!rt2x00queue_empty(queue)) {
+ if (rt2x00queue_dma_timeout(queue))
+ rt2x00usb_watchdog_tx_dma(queue);
+ if (rt2x00queue_timeout(queue))
+ rt2x00usb_watchdog_tx_status(queue);
+ }
}
}
EXPORT_SYMBOL_GPL(rt2x00usb_watchdog);
--
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