linux-kernel - [PATCH 2/2] mrf24j40: Keep the interrupt line enabled

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu,  9 May 2013 17:19:47 +0200
From:	David Hauweele <david@...weele.net>
To:	Alexander Smirnov <alex.bluesman.smirnov@...il.com>,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	linux-zigbee-devel@...ts.sourceforge.net
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	David Hauweele <david@...weele.net>
Subject: [PATCH 2/2] mrf24j40: Keep the interrupt line enabled

Disabling the interrupt line could miss an IRQ and leave the line into a
low state hence locking the driver.

Signed-off-by: David Hauweele <david@...weele.net>
---
 drivers/net/ieee802154/mrf24j40.c |    7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/drivers/net/ieee802154/mrf24j40.c b/drivers/net/ieee802154/mrf24j40.c
index 1e3ddf3..6ef32f7 100644
--- a/drivers/net/ieee802154/mrf24j40.c
+++ b/drivers/net/ieee802154/mrf24j40.c
@@ -603,8 +603,6 @@ static irqreturn_t mrf24j40_isr(int irq, void *data)
 {
 	struct mrf24j40 *devrec = data;
 
-	disable_irq_nosync(irq);
-
 	schedule_work(&devrec->irqwork);
 
 	return IRQ_HANDLED;
@@ -619,7 +617,7 @@ static void mrf24j40_isrwork(struct work_struct *work)
 	/* Read the interrupt status */
 	ret = read_short_reg(devrec, REG_INTSTAT, &intstat);
 	if (ret)
-		goto out;
+		return;
 
 	/* Check for TX complete */
 	if (intstat & 0x1)
@@ -628,9 +626,6 @@ static void mrf24j40_isrwork(struct work_struct *work)
 	/* Check for Rx */
 	if (intstat & 0x8)
 		schedule_work(&devrec->rxwork);
-
-out:
-	enable_irq(devrec->spi->irq);
 }
 
 static void mrf24j40_rxwork(struct work_struct *work)
-- 
1.7.10.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/