[PATCH v8 03/14] iommu/rockchip: Request irqs in rk_iommu_probe()

Jeffy Chen
2018-03-23T07:38:03Z

Move request_irq to the end of rk_iommu_probe().

Suggested-by: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
Signed-off-by: Jeffy Chen <jeffy.chen-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Acked-by: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
---

Changes in v8: None
Changes in v7: None
Changes in v6: None
Changes in v5: None
Changes in v4: None
Changes in v3:
Loop platform_get_irq() as Robin suggested.

Changes in v2: None

drivers/iommu/rockchip-iommu.c | 38 +++++++++-----------------------------
1 file changed, 9 insertions(+), 29 deletions(-)

diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index 73117dbe839e..ec3ff936aa60 100644
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -90,8 +90,6 @@ struct rk_iommu {
struct device *dev;
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 +828,6 @@ 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 +876,6 @@ 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 +1126,7 @@ 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;

iommu = devm_kzalloc(dev, sizeof(*iommu), GFP_KERNEL);
if (!iommu)
@@ -1165,23 +1153,15 @@ 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;
+ i = 0;
+ while ((irq = platform_get_irq(pdev, i++)) != -ENXIO) {
+ if (irq < 0)
+ return irq;

- 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]);
- 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