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| author | Tang Bin <tangbin@cmss.chinamobile.com> | 2020-04-18 21:47:03 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2020-05-01 13:37:23 +0200 |
| commit | b52649aee6243ea661905bdc5fbe28cc5f6dec76 (patch) | |
| tree | c9eda5b546f9594a44e30089205143754130f862 | |
| parent | ae74c19faa7d7996e857e13165bd40fc4a285e0d (diff) | |
| download | linux-stable-b52649aee6243ea661905bdc5fbe28cc5f6dec76.tar.gz linux-stable-b52649aee6243ea661905bdc5fbe28cc5f6dec76.tar.bz2 linux-stable-b52649aee6243ea661905bdc5fbe28cc5f6dec76.zip | |
iommu/qcom: Fix local_base status check
The function qcom_iommu_device_probe() does not perform sufficient
error checking after executing devm_ioremap_resource(), which can
result in crashes if a critical error path is encountered.
Fixes: 0ae349a0f33f ("iommu/qcom: Add qcom_iommu")
Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20200418134703.1760-1-tangbin@cmss.chinamobile.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
| -rw-r--r-- | drivers/iommu/qcom_iommu.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/iommu/qcom_iommu.c b/drivers/iommu/qcom_iommu.c index 0e2a96467767..5b3b270972f8 100644 --- a/drivers/iommu/qcom_iommu.c +++ b/drivers/iommu/qcom_iommu.c @@ -824,8 +824,11 @@ static int qcom_iommu_device_probe(struct platform_device *pdev) qcom_iommu->dev = dev; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (res) + if (res) { qcom_iommu->local_base = devm_ioremap_resource(dev, res); + if (IS_ERR(qcom_iommu->local_base)) + return PTR_ERR(qcom_iommu->local_base); + } qcom_iommu->iface_clk = devm_clk_get(dev, "iface"); if (IS_ERR(qcom_iommu->iface_clk)) { |