linux-kernel - [PATCH 1/4] MFD/PCAP: fix adc locking

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Date:	Tue, 23 Jun 2009 12:30:58 -0300
From:	Daniel Ribeiro <drwyrm@...il.com>
To:	Samuel Ortiz <sameo@...ux.intel.com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	openezx-devel <openezx-devel@...ts.openezx.org>
Subject: [PATCH 1/4] MFD/PCAP: fix adc locking

Release the lock on error.

Signed-off-by: Daniel Ribeiro <drwyrm@...il.com>

---
 drivers/mfd/ezx-pcap.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/mfd/ezx-pcap.c b/drivers/mfd/ezx-pcap.c
index 671a7ef..c1de4af 100644
--- a/drivers/mfd/ezx-pcap.c
+++ b/drivers/mfd/ezx-pcap.c
@@ -238,8 +238,10 @@ static irqreturn_t pcap_adc_irq(int irq, void *_pcap)
 	mutex_lock(&pcap->adc_mutex);
 	req = pcap->adc_queue[pcap->adc_head];
 
-	if (WARN(!req, KERN_WARNING "adc irq without pending request\n"))
+	if (WARN(!req, KERN_WARNING "adc irq without pending request\n")) {
+		mutex_unlock(&pcap->adc_mutex);
 		return IRQ_HANDLED;
+	}
 
 	/* read requested channels results */
 	ezx_pcap_read(pcap, PCAP_REG_ADC, &tmp);
-- 
tg: (f234012..) pcap/fix-adc-locking (depends on: master)

-- 
Daniel Ribeiro

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