[PATCH v2 1/3] dmaengine: nbpfaxi: Use platform_get_irq_optional() to get the interrupt

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
allocation of IRQ resources in DT core code, this causes an issue
when using hierarchical interrupt domains using "interrupts" property
in the node as this bypasses the hierarchical setup and messes up the
irq chaining.

In preparation for removal of static setup of IRQ resource from DT core
code use platform_get_irq_optional().

There are no non-DT users for this driver so interrupt range
(irq_res->start-irq_res->end) is no longer required and with DT we will
be sure it will be a single IRQ resource for each index.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
---
v1->v2
* Updated the check to consider 0 as no IRQ
---
 drivers/dma/nbpfaxi.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/dma/nbpfaxi.c b/drivers/dma/nbpfaxi.c
index 9c52c57919c6..a7063e9cd551 100644
--- a/drivers/dma/nbpfaxi.c
+++ b/drivers/dma/nbpfaxi.c
@@ -1294,7 +1294,7 @@ static int nbpf_probe(struct platform_device *pdev)
 	struct device_node *np = dev->of_node;
 	struct nbpf_device *nbpf;
 	struct dma_device *dma_dev;
-	struct resource *iomem, *irq_res;
+	struct resource *iomem;
 	const struct nbpf_config *cfg;
 	int num_channels;
 	int ret, irq, eirq, i;
@@ -1335,13 +1335,11 @@ static int nbpf_probe(struct platform_device *pdev)
 	nbpf->config = cfg;
 
 	for (i = 0; irqs < ARRAY_SIZE(irqbuf); i++) {
-		irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, i);
-		if (!irq_res)
-			break;
-
-		for (irq = irq_res->start; irq <= irq_res->end;
-		     irq++, irqs++)
-			irqbuf[irqs] = irq;
+		irq = platform_get_irq_optional(pdev, i);
+		if (irq < 0 && irq != -ENXIO)
+			return irq;
+		if (irq > 0)
+			irqbuf[irqs++] = irq;
 	}
 
 	/*
-- 
2.17.1




[Index of Archives]     [Linux Kernel]     [Linux ARM (vger)]     [Linux ARM MSM]     [Linux Omap]     [Linux Arm]     [Linux Tegra]     [Fedora ARM]     [Linux for Samsung SOC]     [eCos]     [Linux PCI]     [Linux Fastboot]     [Gcc Help]     [Git]     [DCCP]     [IETF Announce]     [Security]     [Linux MIPS]     [Yosemite Campsites]

  Powered by Linux