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authorKefeng Wang2014-05-27 18:18:42 +0800
committerJoerg Roedel2014-05-30 20:20:12 +0200
commitafba256b14644e4ca5f9e84672e61b14cb71c40e (patch)
tree260bbdda7b55d426e9b94eda8fa707d2d82d03e6 /drivers/iommu
parentc7208164e66f63e3ec1759b98087849286410741 (diff)
iommu/msm: Use devm_ioremap_resource to simplify code
Use devm_ioremap_resource() to make the code simpler, drop unused variable, redundant return value check, and error-handing code. Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/msm_iommu_dev.c38
1 files changed, 7 insertions, 31 deletions
diff --git a/drivers/iommu/msm_iommu_dev.c b/drivers/iommu/msm_iommu_dev.c
index 08ba4972da9d..61def7cb5263 100644
--- a/drivers/iommu/msm_iommu_dev.c
+++ b/drivers/iommu/msm_iommu_dev.c
@@ -127,13 +127,12 @@ static void msm_iommu_reset(void __iomem *base, int ncb)
static int msm_iommu_probe(struct platform_device *pdev)
{
- struct resource *r, *r2;
+ struct resource *r;
struct clk *iommu_clk;
struct clk *iommu_pclk;
struct msm_iommu_drvdata *drvdata;
struct msm_iommu_dev *iommu_dev = pdev->dev.platform_data;
void __iomem *regs_base;
- resource_size_t len;
int ret, irq, par;
if (pdev->id == -1) {
@@ -178,35 +177,16 @@ static int msm_iommu_probe(struct platform_device *pdev)
iommu_clk = NULL;
r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "physbase");
-
- if (!r) {
- ret = -ENODEV;
- goto fail_clk;
- }
-
- len = resource_size(r);
-
- r2 = request_mem_region(r->start, len, r->name);
- if (!r2) {
- pr_err("Could not request memory region: start=%p, len=%d\n",
- (void *) r->start, len);
- ret = -EBUSY;
+ regs_base = devm_ioremap_resource(&pdev->dev, r);
+ if (IS_ERR(regs_base)) {
+ ret = PTR_ERR(regs_base);
goto fail_clk;
}
- regs_base = ioremap(r2->start, len);
-
- if (!regs_base) {
- pr_err("Could not ioremap: start=%p, len=%d\n",
- (void *) r2->start, len);
- ret = -EBUSY;
- goto fail_mem;
- }
-
irq = platform_get_irq_byname(pdev, "secure_irq");
if (irq < 0) {
ret = -ENODEV;
- goto fail_io;
+ goto fail_clk;
}
msm_iommu_reset(regs_base, iommu_dev->ncb);
@@ -222,14 +202,14 @@ static int msm_iommu_probe(struct platform_device *pdev)
if (!par) {
pr_err("%s: Invalid PAR value detected\n", iommu_dev->name);
ret = -ENODEV;
- goto fail_io;
+ goto fail_clk;
}
ret = request_irq(irq, msm_iommu_fault_handler, 0,
"msm_iommu_secure_irpt_handler", drvdata);
if (ret) {
pr_err("Request IRQ %d failed with ret=%d\n", irq, ret);
- goto fail_io;
+ goto fail_clk;
}
@@ -250,10 +230,6 @@ static int msm_iommu_probe(struct platform_device *pdev)
clk_disable(iommu_pclk);
return 0;
-fail_io:
- iounmap(regs_base);
-fail_mem:
- release_mem_region(r->start, len);
fail_clk:
if (iommu_clk) {
clk_disable(iommu_clk);