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iommu/rockchip: Don't use platform_get_irq to implicitly count irqs 

Till now the Rockchip iommu driver walked through the irq list via
platform_get_irq() until it encountered an ENXIO error. With the
recent change to add a central error message, this always results
in such an error for each iommu on probe and shutdown.

To not confuse people, switch to platform_count_irqs() to get the
actual number of interrupts before walking through them.

Fixes: 7723f4c5ec ("driver core: platform: Add an error message to platform_get_irq*()")
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Heiko Stuebner 2019-09-25 20:43:46 +02:00 committed by Joerg Roedel
parent a52e197d95
commit f9258156c7
1 changed files with 14 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/iommu/rockchip-iommu.c
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@ -100,6 +100,7 @@ struct rk_iommu {
struct device *dev;
void __iomem **bases;
int num_mmu;
int num_irq;
struct clk_bulk_data *clocks;
int num_clocks;
bool reset_disabled;
@ -1136,7 +1137,7 @@ 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, irq;
int err, i;
iommu = devm_kzalloc(dev, sizeof(*iommu), GFP_KERNEL);
if (!iommu)
@ -1163,6 +1164,10 @@ 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;
iommu->reset_disabled = device_property_read_bool(dev,
"rockchip,disable-mmu-reset");
@ -1219,8 +1224,9 @@ static int rk_iommu_probe(struct platform_device *pdev)
pm_runtime_enable(dev);
i = 0;
while ((irq = platform_get_irq(pdev, i++)) != -ENXIO) {
for (i = 0; i < iommu->num_irq; i++) {
int irq = platform_get_irq(pdev, i);
if (irq < 0)
return irq;
@ -1245,10 +1251,13 @@ err_unprepare_clocks:
static void rk_iommu_shutdown(struct platform_device *pdev)
{
struct rk_iommu *iommu = platform_get_drvdata(pdev);
int i = 0, irq;
int i;
for (i = 0; i < iommu->num_irq; i++) {
int irq = platform_get_irq(pdev, i);
while ((irq = platform_get_irq(pdev, i++)) != -ENXIO)
devm_free_irq(iommu->dev, irq, iommu);
}
pm_runtime_force_suspend(&pdev->dev);
}