From: Joerg Roedel Date: Thu, 11 Jun 2015 07:21:39 +0000 (+0200) Subject: iommu/amd: Handle errors returned from iommu_init_device X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=4d58b8a6de6b8c3611f10124f83e90e5a2406437;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git iommu/amd: Handle errors returned from iommu_init_device Without this patch only -ENOTSUPP is handled, but there are other possible errors. Handle them too. Reported-by: Dan Carpenter Signed-off-by: Joerg Roedel --- diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 8bc6f40edf5e..e5b77d398e9b 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -2265,7 +2265,11 @@ static int amd_iommu_add_device(struct device *dev) iommu = amd_iommu_rlookup_table[devid]; ret = iommu_init_device(dev); - if (ret == -ENOTSUPP) { + if (ret) { + if (ret != -ENOTSUPP) + pr_err("Failed to initialize device %s - trying to proceed anyway\n", + dev_name(dev)); + iommu_ignore_device(dev); dev->archdata.dma_ops = &nommu_dma_ops; goto out; @@ -2273,7 +2277,10 @@ static int amd_iommu_add_device(struct device *dev) init_iommu_group(dev); dev_data = get_dev_data(dev); - if (dev_data && dev_data->iommu_v2) + + BUG_ON(!dev_data); + + if (dev_data->iommu_v2) iommu_request_dm_for_dev(dev); /* Domains are initialized for this device - have a look what we ended up with */