netdev - [PATCH 05/50] USB: misc: uss720: spin

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Message-Id: <1373533573-12272-6-git-send-email-ming.lei@canonical.com>
Date:	Thu, 11 Jul 2013 17:05:28 +0800
From:	Ming Lei <ming.lei@...onical.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-usb@...r.kernel.org, Oliver Neukum <oliver@...kum.org>,
	Alan Stern <stern@...land.harvard.edu>,
	linux-input@...r.kernel.org, linux-bluetooth@...r.kernel.org,
	netdev@...r.kernel.org, linux-wireless@...r.kernel.org,
	linux-media@...r.kernel.org, alsa-devel@...a-project.org,
	Ming Lei <ming.lei@...onical.com>
Subject: [PATCH 05/50] USB: misc: uss720: spin_lock in complete() cleanup

Complete() will be run with interrupt enabled, so change to
spin_lock_irqsave().

Signed-off-by: Ming Lei <ming.lei@...onical.com>
---
 drivers/usb/misc/uss720.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/misc/uss720.c b/drivers/usb/misc/uss720.c
index e129cf6..f7d15e8 100644
--- a/drivers/usb/misc/uss720.c
+++ b/drivers/usb/misc/uss720.c
@@ -121,6 +121,7 @@ static void async_complete(struct urb *urb)
 		dev_err(&urb->dev->dev, "async_complete: urb error %d\n",
 			status);
 	} else if (rq->dr.bRequest == 3) {
+		unsigned long flags;
 		memcpy(priv->reg, rq->reg, sizeof(priv->reg));
 #if 0
 		dev_dbg(&priv->usbdev->dev,
@@ -131,8 +132,11 @@ static void async_complete(struct urb *urb)
 			(unsigned int)priv->reg[6]);
 #endif
 		/* if nAck interrupts are enabled and we have an interrupt, call the interrupt procedure */
-		if (rq->reg[2] & rq->reg[1] & 0x10 && pp)
+		if (rq->reg[2] & rq->reg[1] & 0x10 && pp) {
+			local_irq_save(flags);
 			parport_generic_irq(pp);
+			local_irq_restore(flags);
+		}
 	}
 	complete(&rq->compl);
 	kref_put(&rq->ref_count, destroy_async);
-- 
1.7.9.5

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