Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757384Ab2HUMU5 (ORCPT ); Tue, 21 Aug 2012 08:20:57 -0400 Received: from na3sys009aog137.obsmtp.com ([74.125.149.18]:60889 "EHLO na3sys009aog137.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757351Ab2HUMUs (ORCPT ); Tue, 21 Aug 2012 08:20:48 -0400 From: Felipe Balbi To: alan@linux.intel.com Cc: Tony Lindgren , Kevin Hilman , Linux OMAP Mailing List , Linux ARM Kernel Mailing List , linux-serial@vger.kernel.org, Linux Kernel Mailing List , Santosh Shilimkar , Shubhrajyoti Datta , Felipe Balbi Subject: [PATCH v2 13/13] serial: omap: don't save IRQ flags on hardirq Date: Tue, 21 Aug 2012 15:16:11 +0300 Message-Id: <1345551371-18862-14-git-send-email-balbi@ti.com> X-Mailer: git-send-email 1.7.12.rc3 In-Reply-To: <1345551371-18862-1-git-send-email-balbi@ti.com> References: <1345540555-24359-1-git-send-email-balbi@ti.com> <1345551371-18862-1-git-send-email-balbi@ti.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1497 Lines: 47 When we're running our hardirq handler, there's not need to disable IRQs with spin_lock_irqsave() because IRQs are already disabled. It also makes no difference if we save or not IRQ flags. Switch over to simple spin_lock/spin_unlock and drop the "flags" variable. Signed-off-by: Felipe Balbi --- drivers/tty/serial/omap-serial.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index b79c4fa..a79658d 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -350,11 +350,10 @@ static inline irqreturn_t serial_omap_irq(int irq, void *dev_id) struct tty_struct *tty = up->port.state->port.tty; unsigned int iir, lsr; unsigned int type; - unsigned long flags; irqreturn_t ret = IRQ_HANDLED; int max_count = 256; - spin_lock_irqsave(&up->port.lock, flags); + spin_lock(&up->port.lock); pm_runtime_get_sync(up->dev); do { @@ -394,7 +393,7 @@ static inline irqreturn_t serial_omap_irq(int irq, void *dev_id) } } while (!(iir & UART_IIR_NO_INT) && max_count--); - spin_unlock_irqrestore(&up->port.lock, flags); + spin_unlock(&up->port.lock); tty_flip_buffer_push(tty); -- 1.7.12.rc3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/