On 10/17/2010 7:51 AM, Vasiliy Kulikov wrote:
msm_iommu_probe() didn't free mem_region and mapped IO.
Also if request_mem_region() failed then error handling
code dereferenced NULL pointer.
Signed-off-by: Vasiliy Kulikov<[email protected]>
---
arch/arm/mach-msm/iommu_dev.c | 22 +++++++++++++---------
1 files changed, 13 insertions(+), 9 deletions(-)
diff --git a/arch/arm/mach-msm/iommu_dev.c b/arch/arm/mach-msm/iommu_dev.c
index c33ae78..9019cee 100644
--- a/arch/arm/mach-msm/iommu_dev.c
+++ b/arch/arm/mach-msm/iommu_dev.c
@@ -128,7 +128,7 @@ static void msm_iommu_reset(void __iomem *base)
static int msm_iommu_probe(struct platform_device *pdev)
{
- struct resource *r;
+ struct resource *r, *r2;
struct clk *iommu_clk;
struct msm_iommu_drvdata *drvdata;
struct msm_iommu_dev *iommu_dev = pdev->dev.platform_data;
@@ -183,27 +183,27 @@ static int msm_iommu_probe(struct platform_device *pdev)
len = r->end - r->start + 1;
- r = request_mem_region(r->start, len, r->name);
- if (!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;
goto fail;
}
- regs_base = ioremap(r->start, len);
+ regs_base = ioremap(r2->start, len);
if (!regs_base) {
pr_err("Could not ioremap: start=%p, len=%d\n",
- (void *) r->start, len);
+ (void *) r2->start, len);
ret = -EBUSY;
- goto fail;
+ goto fail_mem;
}
irq = platform_get_irq_byname(pdev, "secure_irq");
if (irq< 0) {
ret = -ENODEV;
- goto fail;
+ goto fail_io;
}
mb();
@@ -211,14 +211,14 @@ static int msm_iommu_probe(struct platform_device *pdev)
if (GET_IDR(regs_base) == 0) {
pr_err("Invalid IDR value detected\n");
ret = -ENODEV;
- goto fail;
+ goto fail_io;
}
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;
+ goto fail_io;
}
msm_iommu_reset(regs_base);
@@ -237,6 +237,10 @@ static int msm_iommu_probe(struct platform_device *pdev)
return 0;
+fail_io:
+ iounmap(regs_base);
+fail_mem:
+ release_mem_region(r->start, len);
fail:
kfree(drvdata);
return ret;
Tested on hardware. Looks good. Thanks!
Acked-by: Stepan Moskovchenko <[email protected]>
--
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
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