linux-kernel - [PATCH v2 01/13] iommu/rockchip: Request irqs in rk_iommu

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Message-Id: <20180116132540.18939-2-jeffy.chen@rock-chips.com>
Date:   Tue, 16 Jan 2018 21:25:28 +0800
From:   Jeffy Chen <jeffy.chen@...k-chips.com>
To:     linux-kernel@...r.kernel.org
Cc:     jcliang@...omium.org, robin.murphy@....com, xxm@...k-chips.com,
        tfiga@...omium.org, Jeffy Chen <jeffy.chen@...k-chips.com>,
        Heiko Stuebner <heiko@...ech.de>,
        linux-rockchip@...ts.infradead.org,
        iommu@...ts.linux-foundation.org, Joerg Roedel <joro@...tes.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v2 01/13] iommu/rockchip: Request irqs in rk_iommu_probe()

Suggested-by: Robin Murphy <robin.murphy@....com>
Signed-off-by: Jeffy Chen <jeffy.chen@...k-chips.com>
---

Changes in v2: None

 drivers/iommu/rockchip-iommu.c | 38 +++++++++++---------------------------
 1 file changed, 11 insertions(+), 27 deletions(-)

diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index 9d991c2d8767..4a12d4746095 100644
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -18,6 +18,7 @@
 #include <linux/mm.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_irq.h>
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
@@ -91,7 +92,6 @@ struct rk_iommu {
 	void __iomem **bases;
 	int num_mmu;
 	int *irq;
-	int num_irq;
 	bool reset_disabled;
 	struct iommu_device iommu;
 	struct list_head node; /* entry in rk_iommu_domain.iommus */
@@ -830,13 +830,6 @@ static int rk_iommu_attach_device(struct iommu_domain *domain,
 
 	iommu->domain = domain;
 
-	for (i = 0; i < iommu->num_irq; i++) {
-		ret = devm_request_irq(iommu->dev, iommu->irq[i], rk_iommu_irq,
-				       IRQF_SHARED, dev_name(dev), iommu);
-		if (ret)
-			return ret;
-	}
-
 	for (i = 0; i < iommu->num_mmu; i++) {
 		rk_iommu_write(iommu->bases[i], RK_MMU_DTE_ADDR,
 			       rk_domain->dt_dma);
@@ -885,9 +878,6 @@ static void rk_iommu_detach_device(struct iommu_domain *domain,
 	}
 	rk_iommu_disable_stall(iommu);
 
-	for (i = 0; i < iommu->num_irq; i++)
-		devm_free_irq(iommu->dev, iommu->irq[i], iommu);
-
 	iommu->domain = NULL;
 
 	dev_dbg(dev, "Detached from iommu domain\n");
@@ -1138,7 +1128,7 @@ static int rk_iommu_probe(struct platform_device *pdev)
 	struct rk_iommu *iommu;
 	struct resource *res;
 	int num_res = pdev->num_resources;
-	int err, i;
+	int err, i, irq, num_irq;
 
 	iommu = devm_kzalloc(dev, sizeof(*iommu), GFP_KERNEL);
 	if (!iommu)
@@ -1165,23 +1155,17 @@ static int rk_iommu_probe(struct platform_device *pdev)
 	if (iommu->num_mmu == 0)
 		return PTR_ERR(iommu->bases[0]);
 
-	iommu->num_irq = platform_irq_count(pdev);
-	if (iommu->num_irq < 0)
-		return iommu->num_irq;
-	if (iommu->num_irq == 0)
-		return -ENXIO;
-
-	iommu->irq = devm_kcalloc(dev, iommu->num_irq, sizeof(*iommu->irq),
-				  GFP_KERNEL);
-	if (!iommu->irq)
-		return -ENOMEM;
-
-	for (i = 0; i < iommu->num_irq; i++) {
-		iommu->irq[i] = platform_get_irq(pdev, i);
-		if (iommu->irq[i] < 0) {
-			dev_err(dev, "Failed to get IRQ, %d\n", iommu->irq[i]);
+	num_irq = of_irq_count(dev->of_node);
+	for (i = 0; i < num_irq; i++) {
+		irq = platform_get_irq(pdev, i);
+		if (irq < 0) {
+			dev_err(dev, "Failed to get IRQ, %d\n", irq);
 			return -ENXIO;
 		}
+		err = devm_request_irq(iommu->dev, irq, rk_iommu_irq,
+				       IRQF_SHARED, dev_name(dev), iommu);
+		if (err)
+			return err;
 	}
 
 	iommu->reset_disabled = device_property_read_bool(dev,
-- 
2.11.0