linux-kernel - [PATCH v3] dmaengine: axi-dmac: Request IRQ with IRQF

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Message-Id: <20180428195754.3053-1-mdf@kernel.org>
Date:   Sat, 28 Apr 2018 12:57:54 -0700
From:   Moritz Fischer <mdf@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     dmaengine@...r.kernel.org, dan.j.williams@...el.com,
        vinod.koul@...el.com, lars@...afoo.de,
        Moritz Fischer <mdf@...nel.org>
Subject: [PATCH v3] dmaengine: axi-dmac: Request IRQ with IRQF_SHARED

Request IRQ with IRQF_SHARED flag to enable setups with multiple
instances of the core sharing a single IRQ line.
This works out since the IRQ handler already checks if there is
an actual IRQ pending and returns IRQ_NONE otherwise.

Acked-by: Lars-Peter Clausen <lars@...afoo.de>
Signed-off-by: Moritz Fischer <mdf@...nel.org>
---

Changes from v2:
- Reworded commit message

Changes from v1:
- Added Lars' Acked-by
- Dropped patch [1/2] and changed accordingly

---
 drivers/dma/dma-axi-dmac.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/dma-axi-dmac.c b/drivers/dma/dma-axi-dmac.c
index 2419fe524daa..15b2453d2647 100644
--- a/drivers/dma/dma-axi-dmac.c
+++ b/drivers/dma/dma-axi-dmac.c
@@ -687,7 +687,7 @@ static int axi_dmac_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_unregister_device;
 
-	ret = request_irq(dmac->irq, axi_dmac_interrupt_handler, 0,
+	ret = request_irq(dmac->irq, axi_dmac_interrupt_handler, IRQF_SHARED,
 		dev_name(&pdev->dev), dmac);
 	if (ret)
 		goto err_unregister_of;
-- 
2.17.0