linux-kernel - [PATCH 1/2] perf: dsu: Allow multiple devices share same IRQ.

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Message-Id: <1584491176-31358-1-git-send-email-tuanphan@os.amperecomputing.com>
Date:   Tue, 17 Mar 2020 17:26:15 -0700
From:   Tuan Phan <tuanphan@...amperecomputing.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     patches@...erecomputing.com, Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] perf: dsu: Allow multiple devices share same IRQ.

Add IRQF_SHARED flag when register IRQ such that multiple dsu
devices can share same IRQ.

Signed-off-by: Tuan Phan <tuanphan@...amperecomputing.com>
---
 drivers/perf/arm_dsu_pmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/perf/arm_dsu_pmu.c b/drivers/perf/arm_dsu_pmu.c
index 70968c8..2622900 100644
--- a/drivers/perf/arm_dsu_pmu.c
+++ b/drivers/perf/arm_dsu_pmu.c
@@ -700,7 +700,7 @@ static int dsu_pmu_device_probe(struct platform_device *pdev)
 	if (!name)
 		return -ENOMEM;
 	rc = devm_request_irq(&pdev->dev, irq, dsu_pmu_handle_irq,
-			      IRQF_NOBALANCING, name, dsu_pmu);
+			      IRQF_NOBALANCING | IRQF_SHARED, name, dsu_pmu);
 	if (rc) {
 		dev_warn(&pdev->dev, "Failed to request IRQ %d\n", irq);
 		return rc;
-- 
2.7.4