From: Daniel Ribeiro <drwyrm@gmail.com>
Date: Tue, 23 Jun 2009 15:30:58 +0000 (-0300)
Subject: mfd: fix pcap adc locking
X-Git-Tag: firefly_0821_release~13499^2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=1c90ea2c7eb3b24a07a2f82164323588fb029bc1;p=firefly-linux-kernel-4.4.55.git

mfd: fix pcap adc locking

Release the lock on error.

Signed-off-by: Daniel Ribeiro <drwyrm@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
---

diff --git a/drivers/mfd/ezx-pcap.c b/drivers/mfd/ezx-pcap.c
index 671a7efe86a8..c1de4afa89a6 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);