From: Bob Copeland <me@bobcopeland.com>
Date: Sun, 15 Feb 2009 17:06:09 +0000 (-0500)
Subject: ath5k: don't mask off interrupt bits
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=0b6f582bd38783e14f67d4466923f587728b2438;p=openwrt%2Fstaging%2Fblogic.git

ath5k: don't mask off interrupt bits

Since interrupts are already masked by the hardware, there's no need to
discard interrupt bits in the ISR itself.  Also, in ath5k_beacon_config
we mask off a couple of bits without locking, so doing this mask in
software can lead to unhandled beacon timer and beacon miss interrupts.

Changes-licensed-under: 3-Clause-BSD

Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/drivers/net/wireless/ath5k/base.c b/drivers/net/wireless/ath5k/base.c
index 6837ca9f3831..d930c10a7e52 100644
--- a/drivers/net/wireless/ath5k/base.c
+++ b/drivers/net/wireless/ath5k/base.c
@@ -2408,16 +2408,9 @@ ath5k_intr(int irq, void *dev_id)
 		return IRQ_NONE;
 
 	do {
-		/*
-		 * Figure out the reason(s) for the interrupt.  Note
-		 * that get_isr returns a pseudo-ISR that may include
-		 * bits we haven't explicitly enabled so we mask the
-		 * value to insure we only process bits we requested.
-		 */
 		ath5k_hw_get_isr(ah, &status);		/* NB: clears IRQ too */
 		ATH5K_DBG(sc, ATH5K_DEBUG_INTR, "status 0x%x/0x%x\n",
 				status, sc->imask);
-		status &= sc->imask; /* discard unasked for bits */
 		if (unlikely(status & AR5K_INT_FATAL)) {
 			/*
 			 * Fatal errors are unrecoverable.