linux-kernel - [PATCH 4/4] Staging: ipack/devices/ipoctal: remove unneeded lock in IRQ handler

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Date:	Mon, 25 Jun 2012 17:15:47 +0200
From:	Samuel Iglesias Gonsalvez <siglesias@...lia.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Samuel Iglesias Gonsalvez <siglesias@...lia.com>,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: [PATCH 4/4] Staging: ipack/devices/ipoctal: remove unneeded lock in IRQ handler

In the rest of the code, the data is protected with spin_lock_irqsave().

Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@...lia.com>
---
 drivers/staging/ipack/devices/ipoctal.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/staging/ipack/devices/ipoctal.c b/drivers/staging/ipack/devices/ipoctal.c
index b11126d..ec7b2f9 100644
--- a/drivers/staging/ipack/devices/ipoctal.c
+++ b/drivers/staging/ipack/devices/ipoctal.c
@@ -299,7 +299,7 @@ static int ipoctal_irq_handler(void *arg)
 				ipoctal->nb_bytes[channel] = 0;
 				continue;
 			}
-			spin_lock(&ipoctal->lock[channel]);
+
 			value = ipoctal->tty_port[channel].xmit_buf[*pointer_write];
 			ipoctal_write_io_reg(ipoctal,
 					     &ipoctal->chan_regs[channel].u.w.thr,
@@ -309,7 +309,6 @@ static int ipoctal_irq_handler(void *arg)
 			(*pointer_write)++;
 			*pointer_write = *pointer_write % PAGE_SIZE;
 			ipoctal->nb_bytes[channel]--;
-			spin_unlock(&ipoctal->lock[channel]);
 
 			if ((ipoctal->nb_bytes[channel] == 0) &&
 			    (waitqueue_active(&ipoctal->queue[channel]))) {
-- 
1.7.10

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