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path: root/drivers/iommu/rockchip-iommu.c
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Diffstat (limited to 'drivers/iommu/rockchip-iommu.c')
-rw-r--r--drivers/iommu/rockchip-iommu.c46
1 files changed, 28 insertions, 18 deletions
diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index de8d3bf91b23..258115b10fa9 100644
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -521,10 +521,11 @@ static irqreturn_t rk_iommu_irq(int irq, void *dev_id)
u32 int_status;
dma_addr_t iova;
irqreturn_t ret = IRQ_NONE;
- int i;
+ int i, err;
- if (WARN_ON(!pm_runtime_get_if_in_use(iommu->dev)))
- return 0;
+ err = pm_runtime_get_if_in_use(iommu->dev);
+ if (WARN_ON_ONCE(err <= 0))
+ return ret;
if (WARN_ON(clk_bulk_enable(iommu->num_clocks, iommu->clocks)))
goto out;
@@ -620,11 +621,15 @@ static void rk_iommu_zap_iova(struct rk_iommu_domain *rk_domain,
spin_lock_irqsave(&rk_domain->iommus_lock, flags);
list_for_each(pos, &rk_domain->iommus) {
struct rk_iommu *iommu;
+ int ret;
iommu = list_entry(pos, struct rk_iommu, node);
/* Only zap TLBs of IOMMUs that are powered on. */
- if (pm_runtime_get_if_in_use(iommu->dev)) {
+ ret = pm_runtime_get_if_in_use(iommu->dev);
+ if (WARN_ON_ONCE(ret < 0))
+ continue;
+ if (ret) {
WARN_ON(clk_bulk_enable(iommu->num_clocks,
iommu->clocks));
rk_iommu_zap_lines(iommu, iova, size);
@@ -891,6 +896,7 @@ static void rk_iommu_detach_device(struct iommu_domain *domain,
struct rk_iommu *iommu;
struct rk_iommu_domain *rk_domain = to_rk_domain(domain);
unsigned long flags;
+ int ret;
/* Allow 'virtual devices' (eg drm) to detach from domain */
iommu = rk_iommu_from_dev(dev);
@@ -909,7 +915,9 @@ static void rk_iommu_detach_device(struct iommu_domain *domain,
list_del_init(&iommu->node);
spin_unlock_irqrestore(&rk_domain->iommus_lock, flags);
- if (pm_runtime_get_if_in_use(iommu->dev)) {
+ ret = pm_runtime_get_if_in_use(iommu->dev);
+ WARN_ON_ONCE(ret < 0);
+ if (ret > 0) {
rk_iommu_disable(iommu);
pm_runtime_put(iommu->dev);
}
@@ -946,7 +954,8 @@ static int rk_iommu_attach_device(struct iommu_domain *domain,
list_add_tail(&iommu->node, &rk_domain->iommus);
spin_unlock_irqrestore(&rk_domain->iommus_lock, flags);
- if (!pm_runtime_get_if_in_use(iommu->dev))
+ ret = pm_runtime_get_if_in_use(iommu->dev);
+ if (!ret || WARN_ON_ONCE(ret < 0))
return 0;
ret = rk_iommu_enable(iommu);
@@ -1110,7 +1119,6 @@ static const struct iommu_ops rk_iommu_ops = {
.detach_dev = rk_iommu_detach_device,
.map = rk_iommu_map,
.unmap = rk_iommu_unmap,
- .map_sg = default_iommu_map_sg,
.add_device = rk_iommu_add_device,
.remove_device = rk_iommu_remove_device,
.iova_to_phys = rk_iommu_iova_to_phys,
@@ -1152,17 +1160,6 @@ static int rk_iommu_probe(struct platform_device *pdev)
if (iommu->num_mmu == 0)
return PTR_ERR(iommu->bases[0]);
- i = 0;
- while ((irq = platform_get_irq(pdev, i++)) != -ENXIO) {
- if (irq < 0)
- return irq;
-
- 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,
"rockchip,disable-mmu-reset");
@@ -1219,6 +1216,19 @@ static int rk_iommu_probe(struct platform_device *pdev)
pm_runtime_enable(dev);
+ i = 0;
+ while ((irq = platform_get_irq(pdev, i++)) != -ENXIO) {
+ if (irq < 0)
+ return irq;
+
+ err = devm_request_irq(iommu->dev, irq, rk_iommu_irq,
+ IRQF_SHARED, dev_name(dev), iommu);
+ if (err) {
+ pm_runtime_disable(dev);
+ goto err_remove_sysfs;
+ }
+ }
+
return 0;
err_remove_sysfs:
iommu_device_sysfs_remove(&iommu->iommu);