linux-kernel - [PATCH 3.18 007/150] ath9k_hw: fix hardware queue allocation

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Message-Id: <20150114072056.183443206@linuxfoundation.org>
Date:	Tue, 13 Jan 2015 23:21:18 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Hubert Feurstein <h.feurstein@...il.com>,
	Felix Fietkau <nbd@...nwrt.org>,
	"John W. Linville" <linville@...driver.com>
Subject: [PATCH 3.18 007/150] ath9k_hw: fix hardware queue allocation

3.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Felix Fietkau <nbd@...nwrt.org>

commit ad8fdccf9c197a89e2d2fa78c453283dcc2c343f upstream.

The driver passes the desired hardware queue index for a WMM data queue
in qinfo->tqi_subtype. This was ignored in ath9k_hw_setuptxqueue, which
instead relied on the order in which the function is called.

Reported-by: Hubert Feurstein <h.feurstein@...il.com>
Signed-off-by: Felix Fietkau <nbd@...nwrt.org>
Signed-off-by: John W. Linville <linville@...driver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/wireless/ath/ath9k/mac.c |    9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

--- a/drivers/net/wireless/ath/ath9k/mac.c
+++ b/drivers/net/wireless/ath/ath9k/mac.c
@@ -311,14 +311,7 @@ int ath9k_hw_setuptxqueue(struct ath_hw
 		q = ATH9K_NUM_TX_QUEUES - 3;
 		break;
 	case ATH9K_TX_QUEUE_DATA:
-		for (q = 0; q < ATH9K_NUM_TX_QUEUES; q++)
-			if (ah->txq[q].tqi_type ==
-			    ATH9K_TX_QUEUE_INACTIVE)
-				break;
-		if (q == ATH9K_NUM_TX_QUEUES) {
-			ath_err(common, "No available TX queue\n");
-			return -1;
-		}
+		q = qinfo->tqi_subtype;
 		break;
 	default:
 		ath_err(common, "Invalid TX queue type: %u\n", type);


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