From: Felipe Balbi <balbi@ti.com> To: alan@linux.intel.com Cc: Tony Lindgren <tony@atomide.com>, Kevin Hilman <khilman@ti.com>, Linux OMAP Mailing List <linux-omap@vger.kernel.org>, Linux ARM Kernel Mailing List <linux-arm-kernel@lists.infradead.org>, linux-serial@vger.kernel.org, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Santosh Shilimkar <santosh.shilimkar@ti.com>, Shubhrajyoti Datta <shubhrajyoti@ti.com>, Felipe Balbi <balbi@ti.com> Subject: [PATCH v2 13/13] serial: omap: don't save IRQ flags on hardirq Date: Tue, 21 Aug 2012 15:16:11 +0300 [thread overview] Message-ID: <1345551371-18862-14-git-send-email-balbi@ti.com> (raw) In-Reply-To: <1345551371-18862-1-git-send-email-balbi@ti.com> 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 <balbi@ti.com> --- 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
WARNING: multiple messages have this Message-ID (diff)
From: balbi@ti.com (Felipe Balbi) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 13/13] serial: omap: don't save IRQ flags on hardirq Date: Tue, 21 Aug 2012 15:16:11 +0300 [thread overview] Message-ID: <1345551371-18862-14-git-send-email-balbi@ti.com> (raw) In-Reply-To: <1345551371-18862-1-git-send-email-balbi@ti.com> 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 <balbi@ti.com> --- 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
next prev parent reply other threads:[~2012-08-21 12:20 UTC|newest] Thread overview: 129+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-08-21 9:15 [RFC/PATCH 00/13] OMAP UART patches Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:15 ` [RFC/PATCH 01/13] serial: omap: define and use to_uart_omap_port() Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:15 ` [RFC/PATCH 02/13] serial: omap: always return IRQ_HANDLED Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 11:50 ` Alan Cox 2012-08-21 11:50 ` Alan Cox 2012-08-21 11:50 ` Alan Cox 2012-08-21 11:54 ` Felipe Balbi 2012-08-21 11:54 ` Felipe Balbi 2012-08-21 11:54 ` Felipe Balbi 2012-08-21 9:15 ` [RFC/PATCH 03/13] serial: omap: define helpers for pdata function pointers Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:15 ` [RFC/PATCH 04/13] serial: omap: don't access the platform_device Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:15 ` [RFC/PATCH 05/13] serial: omap: drop DMA support Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:44 ` Shilimkar, Santosh 2012-08-21 9:44 ` Shilimkar, Santosh 2012-08-21 9:44 ` Shilimkar, Santosh 2012-08-21 10:20 ` Felipe Balbi 2012-08-21 10:20 ` Felipe Balbi 2012-08-21 10:20 ` Felipe Balbi 2012-08-21 10:35 ` Shilimkar, Santosh 2012-08-21 10:35 ` Shilimkar, Santosh 2012-08-21 10:35 ` Shilimkar, Santosh 2012-08-21 10:34 ` Felipe Balbi 2012-08-21 10:34 ` Felipe Balbi 2012-08-21 10:34 ` Felipe Balbi 2012-08-21 9:15 ` [RFC/PATCH 06/13] serial: add OMAP-specific defines Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:15 ` [RFC/PATCH 07/13] serial: omap: simplify IRQ handling Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:15 ` [RFC/PATCH 08/13] serial: omap: refactor receive_chars() into rdi/rlsi handlers Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:15 ` [RFC/PATCH 09/13] serial: omap: move THRE check to transmit_chars() Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:15 ` [RFC/PATCH 10/13] serial: omap: stick to put_autosuspend Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 10:42 ` Shilimkar, Santosh 2012-08-21 10:42 ` Shilimkar, Santosh 2012-08-21 10:42 ` Shilimkar, Santosh 2012-08-21 10:57 ` Felipe Balbi 2012-08-21 10:57 ` Felipe Balbi 2012-08-21 10:57 ` Felipe Balbi 2012-08-21 11:05 ` Shilimkar, Santosh 2012-08-21 11:05 ` Shilimkar, Santosh 2012-08-21 11:05 ` Shilimkar, Santosh 2012-08-21 11:02 ` Felipe Balbi 2012-08-21 11:02 ` Felipe Balbi 2012-08-21 11:02 ` Felipe Balbi 2012-08-21 11:09 ` Felipe Balbi 2012-08-21 11:09 ` Felipe Balbi 2012-08-21 11:09 ` Felipe Balbi 2012-08-21 9:15 ` [RFC/PATCH 11/13] serial: omap: set dev->drvdata before enabling pm_runtime Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:15 ` [RFC/PATCH 12/13] serial: omap: drop unnecessary check from remove Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:15 ` [RFC/PATCH 13/13] serial: omap: make sure to suspend device before remove Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 9:15 ` Felipe Balbi 2012-08-21 10:43 ` [RFC/PATCH 00/13] OMAP UART patches Shilimkar, Santosh 2012-08-21 10:43 ` Shilimkar, Santosh 2012-08-21 10:43 ` Shilimkar, Santosh 2012-08-21 12:15 ` [PATCH v2 00/13] OMAP Serial patches Felipe Balbi 2012-08-21 12:15 ` Felipe Balbi 2012-08-21 12:15 ` Felipe Balbi 2012-08-21 12:15 ` [PATCH v2 01/13] serial: omap: define and use to_uart_omap_port() Felipe Balbi 2012-08-21 12:15 ` Felipe Balbi 2012-08-21 12:15 ` Felipe Balbi 2012-08-21 12:16 ` [PATCH v2 02/13] serial: omap: define helpers for pdata function pointers Felipe Balbi 2012-08-21 12:16 ` Felipe Balbi 2012-08-21 12:16 ` Felipe Balbi 2012-08-21 12:16 ` [PATCH v2 03/13] serial: omap: don't access the platform_device Felipe Balbi 2012-08-21 12:16 ` Felipe Balbi 2012-08-21 12:16 ` Felipe Balbi 2012-08-21 12:16 ` [PATCH v2 04/13] serial: omap: drop DMA support Felipe Balbi 2012-08-21 12:16 ` Felipe Balbi 2012-08-21 12:16 ` Felipe Balbi 2012-08-21 12:16 ` [PATCH v2 05/13] serial: add OMAP-specific defines Felipe Balbi 2012-08-21 12:16 ` Felipe Balbi 2012-08-21 12:16 ` Felipe Balbi 2012-08-21 12:16 ` [PATCH v2 06/13] serial: omap: simplify IRQ handling Felipe Balbi 2012-08-21 12:16 ` Felipe Balbi 2012-08-21 12:16 ` Felipe Balbi 2012-08-21 12:16 ` [PATCH v2 07/13] serial: omap: refactor receive_chars() into rdi/rlsi handlers Felipe Balbi 2012-08-21 12:16 ` Felipe Balbi 2012-08-21 12:16 ` Felipe Balbi 2012-08-21 12:16 ` [PATCH v2 08/13] serial: omap: move THRE check to transmit_chars() Felipe Balbi 2012-08-21 12:16 ` Felipe Balbi 2012-08-21 12:16 ` Felipe Balbi 2012-08-21 12:16 ` [PATCH v2 09/13] serial: omap: stick to put_autosuspend Felipe Balbi 2012-08-21 12:16 ` Felipe Balbi 2012-08-21 12:16 ` Felipe Balbi 2012-08-21 12:16 ` [PATCH v2 10/13] serial: omap: set dev->drvdata before enabling pm_runtime Felipe Balbi 2012-08-21 12:16 ` Felipe Balbi 2012-08-21 12:16 ` Felipe Balbi 2012-08-21 12:16 ` [PATCH v2 11/13] serial: omap: drop unnecessary check from remove Felipe Balbi 2012-08-21 12:16 ` Felipe Balbi 2012-08-21 12:16 ` Felipe Balbi 2012-08-21 12:16 ` [PATCH v2 12/13] serial: omap: make sure to suspend device before remove Felipe Balbi 2012-08-21 12:16 ` Felipe Balbi 2012-08-21 12:16 ` Felipe Balbi 2012-08-21 12:16 ` Felipe Balbi [this message] 2012-08-21 12:16 ` [PATCH v2 13/13] serial: omap: don't save IRQ flags on hardirq Felipe Balbi 2012-08-21 12:16 ` Felipe Balbi 2012-08-21 13:01 ` [PATCH v2 00/13] OMAP Serial patches Felipe Balbi 2012-08-21 13:01 ` Felipe Balbi 2012-08-21 13:01 ` Felipe Balbi 2012-08-21 15:07 ` Felipe Balbi 2012-08-21 15:07 ` Felipe Balbi 2012-08-21 15:07 ` Felipe Balbi 2012-08-23 6:26 ` Felipe Balbi 2012-08-23 6:26 ` Felipe Balbi 2012-08-23 6:26 ` Felipe Balbi
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