linux-kernel - [PATCH 2/2] EDAC, altera: Add IRQ Flags to disable IRQ while handling

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Message-ID: <1474582419-7053-2-git-send-email-tthayer@opensource.altera.com>
Date:   Thu, 22 Sep 2016 17:13:39 -0500
From:   <tthayer@...nsource.altera.com>
To:     <bp@...en8.de>, <mchehab@...nel.org>
CC:     <linux-edac@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <tthayer@...nsource.altera.com>
Subject: [PATCH 2/2] EDAC, altera: Add IRQ Flags to disable IRQ while handling

From: Thor Thayer <tthayer@...nsource.altera.com>

Add the IRQF_ONESHOT and IRQF_TRIGGER_HIGH flags to disable the
IRQ while executing the IRQ handler. Remove the IRQF_SHARED because
these are not shared IRQs in the domain. Exposed when flooding IRQs.

Signed-off-by: Thor Thayer <tthayer@...nsource.altera.com>
---
 drivers/edac/altera_edac.c |   18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/edac/altera_edac.c b/drivers/edac/altera_edac.c
index afe6305..58d3e2b 100644
--- a/drivers/edac/altera_edac.c
+++ b/drivers/edac/altera_edac.c
@@ -1445,7 +1445,8 @@ static int altr_portb_setup(struct altr_edac_device_dev *device)
 	}
 	rc = devm_request_irq(&altdev->ddev, altdev->sb_irq,
 			      prv->ecc_irq_handler,
-			      IRQF_SHARED, ecc_name, altdev);
+			      IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
+			      ecc_name, altdev);
 	if (rc) {
 		edac_printk(KERN_ERR, EDAC_DEVICE, "PortB SBERR IRQ error\n");
 		goto err_release_group_1;
@@ -1459,7 +1460,8 @@ static int altr_portb_setup(struct altr_edac_device_dev *device)
 	}
 	rc = devm_request_irq(&altdev->ddev, altdev->db_irq,
 			      prv->ecc_irq_handler,
-			      IRQF_SHARED, ecc_name, altdev);
+			      IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
+			      ecc_name, altdev);
 	if (rc) {
 		edac_printk(KERN_ERR, EDAC_DEVICE, "PortB DBERR IRQ error\n");
 		goto err_release_group_1;
@@ -1745,9 +1747,9 @@ static int altr_edac_a10_device_add(struct altr_arria10_edac *edac,
 		rc = -ENODEV;
 		goto err_release_group1;
 	}
-	rc = devm_request_irq(edac->dev, altdev->sb_irq,
-			      prv->ecc_irq_handler,
-			      IRQF_SHARED, ecc_name, altdev);
+	rc = devm_request_irq(edac->dev, altdev->sb_irq, prv->ecc_irq_handler,
+			      IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
+			      ecc_name, altdev);
 	if (rc) {
 		edac_printk(KERN_ERR, EDAC_DEVICE, "No SBERR IRQ resource\n");
 		goto err_release_group1;
@@ -1759,9 +1761,9 @@ static int altr_edac_a10_device_add(struct altr_arria10_edac *edac,
 		rc = -ENODEV;
 		goto err_release_group1;
 	}
-	rc = devm_request_irq(edac->dev, altdev->db_irq,
-			      prv->ecc_irq_handler,
-			      IRQF_SHARED, ecc_name, altdev);
+	rc = devm_request_irq(edac->dev, altdev->db_irq, prv->ecc_irq_handler,
+			      IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
+			      ecc_name, altdev);
 	if (rc) {
 		edac_printk(KERN_ERR, EDAC_DEVICE, "No DBERR IRQ resource\n");
 		goto err_release_group1;
-- 
1.7.9.5