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From: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org,
	industrypack-devel@lists.sourceforge.net,
	Jens Taprogge <jens.taprogge@taprogge.org>,
	Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Subject: [PATCH 12/24] Staging: ipack/bridges/tpci200: Clean up interrupt handling.
Date: Wed, 12 Sep 2012 14:55:34 +0200	[thread overview]
Message-ID: <1347454546-23236-12-git-send-email-siglesias@igalia.com> (raw)
In-Reply-To: <1347454546-23236-1-git-send-email-siglesias@igalia.com>

From: Jens Taprogge <jens.taprogge@taprogge.org>

Previously the return value from tpci200_interrupt was not quite correct
if a slot had caused an interrupt but no handler was instellalled:
IRQ_NONE was returned.  However in this case we react to the interrupt
by disabling the IPack device interrupt.

Basically there are two cases the code now distinguishes:
 - The tpci200 has raised an interrupt.  We handle it and return
   IRQ_HANDLED.
 - Our device did not raise an interrupt. We return IRQ_NONE.

Signed-off-by: Jens Taprogge <jens.taprogge@taprogge.org>
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
---
 drivers/staging/ipack/bridges/tpci200.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/ipack/bridges/tpci200.c b/drivers/staging/ipack/bridges/tpci200.c
index b1ddbe3..0cbaf3a 100644
--- a/drivers/staging/ipack/bridges/tpci200.c
+++ b/drivers/staging/ipack/bridges/tpci200.c
@@ -116,7 +116,6 @@ static irqreturn_t tpci200_interrupt(int irq, void *dev_id)
 	struct tpci200_board *tpci200 = (struct tpci200_board *) dev_id;
 	int i;
 	unsigned short status_reg;
-	irqreturn_t ret = IRQ_NONE;
 	struct slot_irq *slot_irq;
 
 	/* Read status register */
@@ -130,7 +129,7 @@ static irqreturn_t tpci200_interrupt(int irq, void *dev_id)
 				continue;
 			slot_irq = rcu_dereference(tpci200->slots[i].irq);
 			if (slot_irq) {
-				ret = tpci200_slot_irq(slot_irq);
+				tpci200_slot_irq(slot_irq);
 			} else {
 				dev_info(&tpci200->info->pdev->dev,
 					 "No registered ISR for slot [%d:%d]!. IRQ will be disabled.\n",
@@ -141,9 +140,11 @@ static irqreturn_t tpci200_interrupt(int irq, void *dev_id)
 			}
 		}
 		rcu_read_unlock();
-	}
 
-	return ret;
+		return IRQ_HANDLED;
+	} else {
+		return IRQ_NONE;
+	}
 }
 
 static int tpci200_register(struct tpci200_board *tpci200)
-- 
1.7.10.4


  parent reply	other threads:[~2012-09-12 13:03 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-09-12 12:55 [PATCH 01/24] Staging: ipack/bridges/tpci200: add helpers for writing control regs Samuel Iglesias Gonsalvez
2012-09-12 12:55 ` [PATCH 02/24] Staging: ipack/bridges/tpci200: Remove side effects of tpci200_{request,free}_irq Samuel Iglesias Gonsalvez
2012-09-12 12:55 ` [PATCH 03/24] Staging: ipack/bridges/tpci200: Clean up interrupt handler Samuel Iglesias Gonsalvez
2012-09-12 12:55 ` [PATCH 04/24] Staging: ipack/devices/ipoctal: split ipoctal_channel from ipoctal Samuel Iglesias Gonsalvez
2012-09-12 12:55 ` [PATCH 05/24] Staging: ipack/devices/ipoctal: Directly use ioread/iowrite function Samuel Iglesias Gonsalvez
2012-09-12 12:55 ` [PATCH 06/24] Staging: ipack/devices/ipoctal: put ipoctal_channel into tty->driver_data Samuel Iglesias Gonsalvez
2012-09-12 12:55 ` [PATCH 07/24] Staging: ipack/devices/ipoctal: Store isr masks in ipoctal_channel Samuel Iglesias Gonsalvez
2012-09-13 17:43   ` Dan Carpenter
2012-09-13 17:49     ` Dan Carpenter
2012-09-13 18:19       ` Joe Perches
2012-09-13 18:43         ` Jens Taprogge
2012-09-13 19:17           ` Dan Carpenter
2012-09-14  0:25             ` Joe Perches
2012-09-12 12:55 ` [PATCH 08/24] Staging: ipack/devices/ipoctal: Split interrupt service routine Samuel Iglesias Gonsalvez
2012-09-12 12:55 ` [PATCH 09/24] Staging: ipack/devices/ipoctal: remove superfluous function Samuel Iglesias Gonsalvez
2012-09-12 12:55 ` [PATCH 10/24] Staging: ipack/bridges/tpci200: RCU protect slot_irq pointers Samuel Iglesias Gonsalvez
2012-09-12 12:55 ` [PATCH 11/24] Staging: ipack/bridges/tpci200: Protect device registers with spinlock Samuel Iglesias Gonsalvez
2012-09-12 12:55 ` Samuel Iglesias Gonsalvez [this message]
2012-09-12 12:55 ` [PATCH 13/24] Staging: ipack/bridges/tpci200: Cleanup in tpci200_slot_irq() and tpci200_interrupt() Samuel Iglesias Gonsalvez
2012-09-12 12:55 ` [PATCH 14/24] Staging: ipack/bridges/tpci200: More cleanups Samuel Iglesias Gonsalvez
2012-09-12 12:55 ` [PATCH 15/24] Staging: ipack/bridges/tpci200: move tpci200_free_irq() and tpci200_request_irq() Samuel Iglesias Gonsalvez
2012-09-12 12:55 ` [PATCH 16/24] Staging: ipack: Let interrupts return irqreturn_t Samuel Iglesias Gonsalvez
2012-09-12 12:55 ` [PATCH 17/24] Staging: ipack/devices/ipoctal: Clean up device removal Samuel Iglesias Gonsalvez
2012-09-12 12:55 ` [PATCH 18/24] Staging: ipack/devices/ipoctal: Check tty_register_device return value Samuel Iglesias Gonsalvez
2012-09-12 12:55 ` [PATCH 19/24] Staging: ipack/devices/ipoctal: Use KBUILD_MODNAME instead of hardcoded string Samuel Iglesias Gonsalvez
2012-09-12 12:55 ` [PATCH 20/24] Staging: ipack/devices/ipoctal: Get rid of ipoctal_list Samuel Iglesias Gonsalvez
2012-09-12 12:55 ` [PATCH 21/24] Staging: ipack/devices/ipoctal: read more than one character from RX FIFO Samuel Iglesias Gonsalvez
2012-09-12 12:55 ` [PATCH 22/24] Staging: ipack: update TODO file Samuel Iglesias Gonsalvez
2012-09-12 12:55 ` [PATCH 23/24] Staging: ipack/devices/ipoctal: Unmap memory on device removal Samuel Iglesias Gonsalvez
2012-09-12 12:55 ` [PATCH 24/24] staging: ipack/bridges/tpci200: Use endianess-aware types where applicable Samuel Iglesias Gonsalvez

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