Re: [PATCH] vmw_pvrdma: Release netdev when vmxnet3 module is removed

From: Dan Carpenter
Date: Sat Jun 30 2018 - 15:17:01 EST

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In reply to: Neil Horman: "[PATCH v2] vmw_pvrdma: Release netdev when vmxnet3 module is removed"
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Hi Neil,

I love your patch! Perhaps something to improve:

url: https://github.com/0day-ci/linux/commits/Neil-Horman/vmw_pvrdma-Release-netdev-when-vmxnet3-module-is-removed/20180628-232414

smatch warnings:
drivers/infiniband/hw/vmw_pvrdma/pvrdma_main.c:987 pvrdma_pci_probe() warn: variable dereferenced before check 'dev->netdev' (see line 985)

# https://github.com/0day-ci/linux/commit/d5bb424e18e2ecab4ac590a66b0cca9dfb96d3da
git remote add linux-review https://github.com/0day-ci/linux
git remote update linux-review
git checkout d5bb424e18e2ecab4ac590a66b0cca9dfb96d3da
vim +987 drivers/infiniband/hw/vmw_pvrdma/pvrdma_main.c

29c8d9eb Adit Ranadive 2016-10-02 784
29c8d9eb Adit Ranadive 2016-10-02 785 static int pvrdma_pci_probe(struct pci_dev *pdev,
29c8d9eb Adit Ranadive 2016-10-02 786 const struct pci_device_id *id)
29c8d9eb Adit Ranadive 2016-10-02 787 {
29c8d9eb Adit Ranadive 2016-10-02 788 struct pci_dev *pdev_net;
29c8d9eb Adit Ranadive 2016-10-02 789 struct pvrdma_dev *dev;
29c8d9eb Adit Ranadive 2016-10-02 790 int ret;
29c8d9eb Adit Ranadive 2016-10-02 791 unsigned long start;
29c8d9eb Adit Ranadive 2016-10-02 792 unsigned long len;
29c8d9eb Adit Ranadive 2016-10-02 793 dma_addr_t slot_dma = 0;
29c8d9eb Adit Ranadive 2016-10-02 794
29c8d9eb Adit Ranadive 2016-10-02 795 dev_dbg(&pdev->dev, "initializing driver %s\n", pci_name(pdev));
29c8d9eb Adit Ranadive 2016-10-02 796
29c8d9eb Adit Ranadive 2016-10-02 797 /* Allocate zero-out device */
29c8d9eb Adit Ranadive 2016-10-02 798 dev = (struct pvrdma_dev *)ib_alloc_device(sizeof(*dev));
29c8d9eb Adit Ranadive 2016-10-02 799 if (!dev) {
29c8d9eb Adit Ranadive 2016-10-02 800 dev_err(&pdev->dev, "failed to allocate IB device\n");
29c8d9eb Adit Ranadive 2016-10-02 801 return -ENOMEM;
29c8d9eb Adit Ranadive 2016-10-02 802 }
29c8d9eb Adit Ranadive 2016-10-02 803
29c8d9eb Adit Ranadive 2016-10-02 804 mutex_lock(&pvrdma_device_list_lock);
29c8d9eb Adit Ranadive 2016-10-02 805 list_add(&dev->device_link, &pvrdma_device_list);
29c8d9eb Adit Ranadive 2016-10-02 806 mutex_unlock(&pvrdma_device_list_lock);
29c8d9eb Adit Ranadive 2016-10-02 807
29c8d9eb Adit Ranadive 2016-10-02 808 ret = pvrdma_init_device(dev);
29c8d9eb Adit Ranadive 2016-10-02 809 if (ret)
29c8d9eb Adit Ranadive 2016-10-02 810 goto err_free_device;
29c8d9eb Adit Ranadive 2016-10-02 811
29c8d9eb Adit Ranadive 2016-10-02 812 dev->pdev = pdev;
29c8d9eb Adit Ranadive 2016-10-02 813 pci_set_drvdata(pdev, dev);
29c8d9eb Adit Ranadive 2016-10-02 814
29c8d9eb Adit Ranadive 2016-10-02 815 ret = pci_enable_device(pdev);
29c8d9eb Adit Ranadive 2016-10-02 816 if (ret) {
29c8d9eb Adit Ranadive 2016-10-02 817 dev_err(&pdev->dev, "cannot enable PCI device\n");
29c8d9eb Adit Ranadive 2016-10-02 818 goto err_free_device;
29c8d9eb Adit Ranadive 2016-10-02 819 }
29c8d9eb Adit Ranadive 2016-10-02 820
29c8d9eb Adit Ranadive 2016-10-02 821 dev_dbg(&pdev->dev, "PCI resource flags BAR0 %#lx\n",
29c8d9eb Adit Ranadive 2016-10-02 822 pci_resource_flags(pdev, 0));
29c8d9eb Adit Ranadive 2016-10-02 823 dev_dbg(&pdev->dev, "PCI resource len %#llx\n",
29c8d9eb Adit Ranadive 2016-10-02 824 (unsigned long long)pci_resource_len(pdev, 0));
29c8d9eb Adit Ranadive 2016-10-02 825 dev_dbg(&pdev->dev, "PCI resource start %#llx\n",
29c8d9eb Adit Ranadive 2016-10-02 826 (unsigned long long)pci_resource_start(pdev, 0));
29c8d9eb Adit Ranadive 2016-10-02 827 dev_dbg(&pdev->dev, "PCI resource flags BAR1 %#lx\n",
29c8d9eb Adit Ranadive 2016-10-02 828 pci_resource_flags(pdev, 1));
29c8d9eb Adit Ranadive 2016-10-02 829 dev_dbg(&pdev->dev, "PCI resource len %#llx\n",
29c8d9eb Adit Ranadive 2016-10-02 830 (unsigned long long)pci_resource_len(pdev, 1));
29c8d9eb Adit Ranadive 2016-10-02 831 dev_dbg(&pdev->dev, "PCI resource start %#llx\n",
29c8d9eb Adit Ranadive 2016-10-02 832 (unsigned long long)pci_resource_start(pdev, 1));
29c8d9eb Adit Ranadive 2016-10-02 833
29c8d9eb Adit Ranadive 2016-10-02 834 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) ||
29c8d9eb Adit Ranadive 2016-10-02 835 !(pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
29c8d9eb Adit Ranadive 2016-10-02 836 dev_err(&pdev->dev, "PCI BAR region not MMIO\n");
29c8d9eb Adit Ranadive 2016-10-02 837 ret = -ENOMEM;
29c8d9eb Adit Ranadive 2016-10-02 838 goto err_free_device;
29c8d9eb Adit Ranadive 2016-10-02 839 }
29c8d9eb Adit Ranadive 2016-10-02 840
29c8d9eb Adit Ranadive 2016-10-02 841 ret = pci_request_regions(pdev, DRV_NAME);
29c8d9eb Adit Ranadive 2016-10-02 842 if (ret) {
29c8d9eb Adit Ranadive 2016-10-02 843 dev_err(&pdev->dev, "cannot request PCI resources\n");
29c8d9eb Adit Ranadive 2016-10-02 844 goto err_disable_pdev;
29c8d9eb Adit Ranadive 2016-10-02 845 }
29c8d9eb Adit Ranadive 2016-10-02 846
29c8d9eb Adit Ranadive 2016-10-02 847 /* Enable 64-Bit DMA */
29c8d9eb Adit Ranadive 2016-10-02 848 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) {
29c8d9eb Adit Ranadive 2016-10-02 849 ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
29c8d9eb Adit Ranadive 2016-10-02 850 if (ret != 0) {
29c8d9eb Adit Ranadive 2016-10-02 851 dev_err(&pdev->dev,
29c8d9eb Adit Ranadive 2016-10-02 852 "pci_set_consistent_dma_mask failed\n");
29c8d9eb Adit Ranadive 2016-10-02 853 goto err_free_resource;
29c8d9eb Adit Ranadive 2016-10-02 854 }
29c8d9eb Adit Ranadive 2016-10-02 855 } else {
29c8d9eb Adit Ranadive 2016-10-02 856 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
29c8d9eb Adit Ranadive 2016-10-02 857 if (ret != 0) {
29c8d9eb Adit Ranadive 2016-10-02 858 dev_err(&pdev->dev,
29c8d9eb Adit Ranadive 2016-10-02 859 "pci_set_dma_mask failed\n");
29c8d9eb Adit Ranadive 2016-10-02 860 goto err_free_resource;
29c8d9eb Adit Ranadive 2016-10-02 861 }
29c8d9eb Adit Ranadive 2016-10-02 862 }
29c8d9eb Adit Ranadive 2016-10-02 863
29c8d9eb Adit Ranadive 2016-10-02 864 pci_set_master(pdev);
29c8d9eb Adit Ranadive 2016-10-02 865
29c8d9eb Adit Ranadive 2016-10-02 866 /* Map register space */
29c8d9eb Adit Ranadive 2016-10-02 867 start = pci_resource_start(dev->pdev, PVRDMA_PCI_RESOURCE_REG);
29c8d9eb Adit Ranadive 2016-10-02 868 len = pci_resource_len(dev->pdev, PVRDMA_PCI_RESOURCE_REG);
29c8d9eb Adit Ranadive 2016-10-02 869 dev->regs = ioremap(start, len);
29c8d9eb Adit Ranadive 2016-10-02 870 if (!dev->regs) {
29c8d9eb Adit Ranadive 2016-10-02 871 dev_err(&pdev->dev, "register mapping failed\n");
29c8d9eb Adit Ranadive 2016-10-02 872 ret = -ENOMEM;
29c8d9eb Adit Ranadive 2016-10-02 873 goto err_free_resource;
29c8d9eb Adit Ranadive 2016-10-02 874 }
29c8d9eb Adit Ranadive 2016-10-02 875
29c8d9eb Adit Ranadive 2016-10-02 876 /* Setup per-device UAR. */
29c8d9eb Adit Ranadive 2016-10-02 877 dev->driver_uar.index = 0;
29c8d9eb Adit Ranadive 2016-10-02 878 dev->driver_uar.pfn =
29c8d9eb Adit Ranadive 2016-10-02 879 pci_resource_start(dev->pdev, PVRDMA_PCI_RESOURCE_UAR) >>
29c8d9eb Adit Ranadive 2016-10-02 880 PAGE_SHIFT;
29c8d9eb Adit Ranadive 2016-10-02 881 dev->driver_uar.map =
29c8d9eb Adit Ranadive 2016-10-02 882 ioremap(dev->driver_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
29c8d9eb Adit Ranadive 2016-10-02 883 if (!dev->driver_uar.map) {
29c8d9eb Adit Ranadive 2016-10-02 884 dev_err(&pdev->dev, "failed to remap UAR pages\n");
29c8d9eb Adit Ranadive 2016-10-02 885 ret = -ENOMEM;
29c8d9eb Adit Ranadive 2016-10-02 886 goto err_unmap_regs;
29c8d9eb Adit Ranadive 2016-10-02 887 }
29c8d9eb Adit Ranadive 2016-10-02 888
05297b66 Bryan Tan 2017-08-22 889 dev->dsr_version = pvrdma_read_reg(dev, PVRDMA_REG_VERSION);
29c8d9eb Adit Ranadive 2016-10-02 890 dev_info(&pdev->dev, "device version %d, driver version %d\n",
05297b66 Bryan Tan 2017-08-22 891 dev->dsr_version, PVRDMA_VERSION);
29c8d9eb Adit Ranadive 2016-10-02 892
58355656 Himanshu Jha 2017-12-31 893 dev->dsr = dma_zalloc_coherent(&pdev->dev, sizeof(*dev->dsr),
29c8d9eb Adit Ranadive 2016-10-02 894 &dev->dsrbase, GFP_KERNEL);
29c8d9eb Adit Ranadive 2016-10-02 895 if (!dev->dsr) {
29c8d9eb Adit Ranadive 2016-10-02 896 dev_err(&pdev->dev, "failed to allocate shared region\n");
29c8d9eb Adit Ranadive 2016-10-02 897 ret = -ENOMEM;
29c8d9eb Adit Ranadive 2016-10-02 898 goto err_uar_unmap;
29c8d9eb Adit Ranadive 2016-10-02 899 }
29c8d9eb Adit Ranadive 2016-10-02 900
29c8d9eb Adit Ranadive 2016-10-02 901 /* Setup the shared region */
29c8d9eb Adit Ranadive 2016-10-02 902 dev->dsr->driver_version = PVRDMA_VERSION;
29c8d9eb Adit Ranadive 2016-10-02 903 dev->dsr->gos_info.gos_bits = sizeof(void *) == 4 ?
29c8d9eb Adit Ranadive 2016-10-02 904 PVRDMA_GOS_BITS_32 :
29c8d9eb Adit Ranadive 2016-10-02 905 PVRDMA_GOS_BITS_64;
29c8d9eb Adit Ranadive 2016-10-02 906 dev->dsr->gos_info.gos_type = PVRDMA_GOS_TYPE_LINUX;
29c8d9eb Adit Ranadive 2016-10-02 907 dev->dsr->gos_info.gos_ver = 1;
29c8d9eb Adit Ranadive 2016-10-02 908 dev->dsr->uar_pfn = dev->driver_uar.pfn;
29c8d9eb Adit Ranadive 2016-10-02 909
29c8d9eb Adit Ranadive 2016-10-02 910 /* Command slot. */
29c8d9eb Adit Ranadive 2016-10-02 911 dev->cmd_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
29c8d9eb Adit Ranadive 2016-10-02 912 &slot_dma, GFP_KERNEL);
29c8d9eb Adit Ranadive 2016-10-02 913 if (!dev->cmd_slot) {
29c8d9eb Adit Ranadive 2016-10-02 914 ret = -ENOMEM;
29c8d9eb Adit Ranadive 2016-10-02 915 goto err_free_dsr;
29c8d9eb Adit Ranadive 2016-10-02 916 }
29c8d9eb Adit Ranadive 2016-10-02 917
29c8d9eb Adit Ranadive 2016-10-02 918 dev->dsr->cmd_slot_dma = (u64)slot_dma;
29c8d9eb Adit Ranadive 2016-10-02 919
29c8d9eb Adit Ranadive 2016-10-02 920 /* Response slot. */
29c8d9eb Adit Ranadive 2016-10-02 921 dev->resp_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
29c8d9eb Adit Ranadive 2016-10-02 922 &slot_dma, GFP_KERNEL);
29c8d9eb Adit Ranadive 2016-10-02 923 if (!dev->resp_slot) {
29c8d9eb Adit Ranadive 2016-10-02 924 ret = -ENOMEM;
29c8d9eb Adit Ranadive 2016-10-02 925 goto err_free_slots;
29c8d9eb Adit Ranadive 2016-10-02 926 }
29c8d9eb Adit Ranadive 2016-10-02 927
29c8d9eb Adit Ranadive 2016-10-02 928 dev->dsr->resp_slot_dma = (u64)slot_dma;
29c8d9eb Adit Ranadive 2016-10-02 929
29c8d9eb Adit Ranadive 2016-10-02 930 /* Async event ring */
6332dee8 Adit Ranadive 2017-02-22 931 dev->dsr->async_ring_pages.num_pages = PVRDMA_NUM_RING_PAGES;
29c8d9eb Adit Ranadive 2016-10-02 932 ret = pvrdma_page_dir_init(dev, &dev->async_pdir,
29c8d9eb Adit Ranadive 2016-10-02 933 dev->dsr->async_ring_pages.num_pages, true);
29c8d9eb Adit Ranadive 2016-10-02 934 if (ret)
29c8d9eb Adit Ranadive 2016-10-02 935 goto err_free_slots;
29c8d9eb Adit Ranadive 2016-10-02 936 dev->async_ring_state = dev->async_pdir.pages[0];
29c8d9eb Adit Ranadive 2016-10-02 937 dev->dsr->async_ring_pages.pdir_dma = dev->async_pdir.dir_dma;
29c8d9eb Adit Ranadive 2016-10-02 938
29c8d9eb Adit Ranadive 2016-10-02 939 /* CQ notification ring */
6332dee8 Adit Ranadive 2017-02-22 940 dev->dsr->cq_ring_pages.num_pages = PVRDMA_NUM_RING_PAGES;
29c8d9eb Adit Ranadive 2016-10-02 941 ret = pvrdma_page_dir_init(dev, &dev->cq_pdir,
29c8d9eb Adit Ranadive 2016-10-02 942 dev->dsr->cq_ring_pages.num_pages, true);
29c8d9eb Adit Ranadive 2016-10-02 943 if (ret)
29c8d9eb Adit Ranadive 2016-10-02 944 goto err_free_async_ring;
29c8d9eb Adit Ranadive 2016-10-02 945 dev->cq_ring_state = dev->cq_pdir.pages[0];
29c8d9eb Adit Ranadive 2016-10-02 946 dev->dsr->cq_ring_pages.pdir_dma = dev->cq_pdir.dir_dma;
29c8d9eb Adit Ranadive 2016-10-02 947
29c8d9eb Adit Ranadive 2016-10-02 948 /*
29c8d9eb Adit Ranadive 2016-10-02 949 * Write the PA of the shared region to the device. The writes must be
29c8d9eb Adit Ranadive 2016-10-02 950 * ordered such that the high bits are written last. When the writes
29c8d9eb Adit Ranadive 2016-10-02 951 * complete, the device will have filled out the capabilities.
29c8d9eb Adit Ranadive 2016-10-02 952 */
29c8d9eb Adit Ranadive 2016-10-02 953
29c8d9eb Adit Ranadive 2016-10-02 954 pvrdma_write_reg(dev, PVRDMA_REG_DSRLOW, (u32)dev->dsrbase);
29c8d9eb Adit Ranadive 2016-10-02 955 pvrdma_write_reg(dev, PVRDMA_REG_DSRHIGH,
29c8d9eb Adit Ranadive 2016-10-02 956 (u32)((u64)(dev->dsrbase) >> 32));
29c8d9eb Adit Ranadive 2016-10-02 957
29c8d9eb Adit Ranadive 2016-10-02 958 /* Make sure the write is complete before reading status. */
29c8d9eb Adit Ranadive 2016-10-02 959 mb();
29c8d9eb Adit Ranadive 2016-10-02 960
05297b66 Bryan Tan 2017-08-22 961 /* The driver supports RoCE V1 and V2. */
05297b66 Bryan Tan 2017-08-22 962 if (!PVRDMA_SUPPORTED(dev)) {
05297b66 Bryan Tan 2017-08-22 963 dev_err(&pdev->dev, "driver needs RoCE v1 or v2 support\n");
29c8d9eb Adit Ranadive 2016-10-02 964 ret = -EFAULT;
29c8d9eb Adit Ranadive 2016-10-02 965 goto err_free_cq_ring;
29c8d9eb Adit Ranadive 2016-10-02 966 }
29c8d9eb Adit Ranadive 2016-10-02 967
29c8d9eb Adit Ranadive 2016-10-02 968 /* Paired vmxnet3 will have same bus, slot. But func will be 0 */
29c8d9eb Adit Ranadive 2016-10-02 969 pdev_net = pci_get_slot(pdev->bus, PCI_DEVFN(PCI_SLOT(pdev->devfn), 0));
29c8d9eb Adit Ranadive 2016-10-02 970 if (!pdev_net) {
29c8d9eb Adit Ranadive 2016-10-02 971 dev_err(&pdev->dev, "failed to find paired net device\n");
29c8d9eb Adit Ranadive 2016-10-02 972 ret = -ENODEV;
29c8d9eb Adit Ranadive 2016-10-02 973 goto err_free_cq_ring;
29c8d9eb Adit Ranadive 2016-10-02 974 }
29c8d9eb Adit Ranadive 2016-10-02 975
29c8d9eb Adit Ranadive 2016-10-02 976 if (pdev_net->vendor != PCI_VENDOR_ID_VMWARE ||
29c8d9eb Adit Ranadive 2016-10-02 977 pdev_net->device != PCI_DEVICE_ID_VMWARE_VMXNET3) {
29c8d9eb Adit Ranadive 2016-10-02 978 dev_err(&pdev->dev, "failed to find paired vmxnet3 device\n");
29c8d9eb Adit Ranadive 2016-10-02 979 pci_dev_put(pdev_net);
29c8d9eb Adit Ranadive 2016-10-02 980 ret = -ENODEV;
29c8d9eb Adit Ranadive 2016-10-02 981 goto err_free_cq_ring;
29c8d9eb Adit Ranadive 2016-10-02 982 }
29c8d9eb Adit Ranadive 2016-10-02 983
29c8d9eb Adit Ranadive 2016-10-02 984 dev->netdev = pci_get_drvdata(pdev_net);
d5bb424e Neil Horman 2018-06-28 @985 dev_hold(dev->netdev);
^^^^^^^^^^^^^^^^^^^^^
Dereferenced inside the function

29c8d9eb Adit Ranadive 2016-10-02 986 pci_dev_put(pdev_net);
29c8d9eb Adit Ranadive 2016-10-02 @987 if (!dev->netdev) {
^^^^^^^^^^^
Checked too late.

29c8d9eb Adit Ranadive 2016-10-02 988 dev_err(&pdev->dev, "failed to get vmxnet3 device\n");
29c8d9eb Adit Ranadive 2016-10-02 989 ret = -ENODEV;
29c8d9eb Adit Ranadive 2016-10-02 990 goto err_free_cq_ring;
29c8d9eb Adit Ranadive 2016-10-02 991 }
29c8d9eb Adit Ranadive 2016-10-02 992
29c8d9eb Adit Ranadive 2016-10-02 993 dev_info(&pdev->dev, "paired device to %s\n", dev->netdev->name);
29c8d9eb Adit Ranadive 2016-10-02 994
29c8d9eb Adit Ranadive 2016-10-02 995 /* Interrupt setup */
29c8d9eb Adit Ranadive 2016-10-02 996 ret = pvrdma_alloc_intrs(dev);
29c8d9eb Adit Ranadive 2016-10-02 997 if (ret) {
29c8d9eb Adit Ranadive 2016-10-02 998 dev_err(&pdev->dev, "failed to allocate interrupts\n");
29c8d9eb Adit Ranadive 2016-10-02 999 ret = -ENOMEM;
ff89b070 Adit Ranadive 2017-01-19 1000 goto err_free_cq_ring;
29c8d9eb Adit Ranadive 2016-10-02 1001 }
29c8d9eb Adit Ranadive 2016-10-02 1002
29c8d9eb Adit Ranadive 2016-10-02 1003 /* Allocate UAR table. */
29c8d9eb Adit Ranadive 2016-10-02 1004 ret = pvrdma_uar_table_init(dev);
29c8d9eb Adit Ranadive 2016-10-02 1005 if (ret) {
29c8d9eb Adit Ranadive 2016-10-02 1006 dev_err(&pdev->dev, "failed to allocate UAR table\n");
29c8d9eb Adit Ranadive 2016-10-02 1007 ret = -ENOMEM;
29c8d9eb Adit Ranadive 2016-10-02 1008 goto err_free_intrs;
29c8d9eb Adit Ranadive 2016-10-02 1009 }
29c8d9eb Adit Ranadive 2016-10-02 1010
29c8d9eb Adit Ranadive 2016-10-02 1011 /* Allocate GID table */
29c8d9eb Adit Ranadive 2016-10-02 1012 dev->sgid_tbl = kcalloc(dev->dsr->caps.gid_tbl_len,
29c8d9eb Adit Ranadive 2016-10-02 1013 sizeof(union ib_gid), GFP_KERNEL);
29c8d9eb Adit Ranadive 2016-10-02 1014 if (!dev->sgid_tbl) {
29c8d9eb Adit Ranadive 2016-10-02 1015 ret = -ENOMEM;
29c8d9eb Adit Ranadive 2016-10-02 1016 goto err_free_uar_table;
29c8d9eb Adit Ranadive 2016-10-02 1017 }
29c8d9eb Adit Ranadive 2016-10-02 1018 dev_dbg(&pdev->dev, "gid table len %d\n", dev->dsr->caps.gid_tbl_len);
29c8d9eb Adit Ranadive 2016-10-02 1019
29c8d9eb Adit Ranadive 2016-10-02 1020 pvrdma_enable_intrs(dev);
29c8d9eb Adit Ranadive 2016-10-02 1021
29c8d9eb Adit Ranadive 2016-10-02 1022 /* Activate pvrdma device */
29c8d9eb Adit Ranadive 2016-10-02 1023 pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_ACTIVATE);
29c8d9eb Adit Ranadive 2016-10-02 1024
29c8d9eb Adit Ranadive 2016-10-02 1025 /* Make sure the write is complete before reading status. */
29c8d9eb Adit Ranadive 2016-10-02 1026 mb();
29c8d9eb Adit Ranadive 2016-10-02 1027
29c8d9eb Adit Ranadive 2016-10-02 1028 /* Check if device was successfully activated */
29c8d9eb Adit Ranadive 2016-10-02 1029 ret = pvrdma_read_reg(dev, PVRDMA_REG_ERR);
29c8d9eb Adit Ranadive 2016-10-02 1030 if (ret != 0) {
29c8d9eb Adit Ranadive 2016-10-02 1031 dev_err(&pdev->dev, "failed to activate device\n");
29c8d9eb Adit Ranadive 2016-10-02 1032 ret = -EFAULT;
29c8d9eb Adit Ranadive 2016-10-02 1033 goto err_disable_intr;
29c8d9eb Adit Ranadive 2016-10-02 1034 }
29c8d9eb Adit Ranadive 2016-10-02 1035
29c8d9eb Adit Ranadive 2016-10-02 1036 /* Register IB device */
29c8d9eb Adit Ranadive 2016-10-02 1037 ret = pvrdma_register_device(dev);
29c8d9eb Adit Ranadive 2016-10-02 1038 if (ret) {
29c8d9eb Adit Ranadive 2016-10-02 1039 dev_err(&pdev->dev, "failed to register IB device\n");
29c8d9eb Adit Ranadive 2016-10-02 1040 goto err_disable_intr;
29c8d9eb Adit Ranadive 2016-10-02 1041 }
29c8d9eb Adit Ranadive 2016-10-02 1042
29c8d9eb Adit Ranadive 2016-10-02 1043 dev->nb_netdev.notifier_call = pvrdma_netdevice_event;
29c8d9eb Adit Ranadive 2016-10-02 1044 ret = register_netdevice_notifier(&dev->nb_netdev);
29c8d9eb Adit Ranadive 2016-10-02 1045 if (ret) {
29c8d9eb Adit Ranadive 2016-10-02 1046 dev_err(&pdev->dev, "failed to register netdevice events\n");
29c8d9eb Adit Ranadive 2016-10-02 1047 goto err_unreg_ibdev;
29c8d9eb Adit Ranadive 2016-10-02 1048 }
29c8d9eb Adit Ranadive 2016-10-02 1049
29c8d9eb Adit Ranadive 2016-10-02 1050 dev_info(&pdev->dev, "attached to device\n");
29c8d9eb Adit Ranadive 2016-10-02 1051 return 0;
29c8d9eb Adit Ranadive 2016-10-02 1052
29c8d9eb Adit Ranadive 2016-10-02 1053 err_unreg_ibdev:
29c8d9eb Adit Ranadive 2016-10-02 1054 ib_unregister_device(&dev->ib_dev);
29c8d9eb Adit Ranadive 2016-10-02 1055 err_disable_intr:
29c8d9eb Adit Ranadive 2016-10-02 1056 pvrdma_disable_intrs(dev);
29c8d9eb Adit Ranadive 2016-10-02 1057 kfree(dev->sgid_tbl);
29c8d9eb Adit Ranadive 2016-10-02 1058 err_free_uar_table:
29c8d9eb Adit Ranadive 2016-10-02 1059 pvrdma_uar_table_cleanup(dev);
29c8d9eb Adit Ranadive 2016-10-02 1060 err_free_intrs:
29c8d9eb Adit Ranadive 2016-10-02 1061 pvrdma_free_irq(dev);
7bf3976d Christoph Hellwig 2017-02-15 1062 pci_free_irq_vectors(pdev);
29c8d9eb Adit Ranadive 2016-10-02 1063 err_free_cq_ring:
29c8d9eb Adit Ranadive 2016-10-02 1064 pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
29c8d9eb Adit Ranadive 2016-10-02 1065 err_free_async_ring:
29c8d9eb Adit Ranadive 2016-10-02 1066 pvrdma_page_dir_cleanup(dev, &dev->async_pdir);
29c8d9eb Adit Ranadive 2016-10-02 1067 err_free_slots:
29c8d9eb Adit Ranadive 2016-10-02 1068 pvrdma_free_slots(dev);
29c8d9eb Adit Ranadive 2016-10-02 1069 err_free_dsr:
29c8d9eb Adit Ranadive 2016-10-02 1070 dma_free_coherent(&pdev->dev, sizeof(*dev->dsr), dev->dsr,
29c8d9eb Adit Ranadive 2016-10-02 1071 dev->dsrbase);
29c8d9eb Adit Ranadive 2016-10-02 1072 err_uar_unmap:
29c8d9eb Adit Ranadive 2016-10-02 1073 iounmap(dev->driver_uar.map);
29c8d9eb Adit Ranadive 2016-10-02 1074 err_unmap_regs:
29c8d9eb Adit Ranadive 2016-10-02 1075 iounmap(dev->regs);
29c8d9eb Adit Ranadive 2016-10-02 1076 err_free_resource:
29c8d9eb Adit Ranadive 2016-10-02 1077 pci_release_regions(pdev);
29c8d9eb Adit Ranadive 2016-10-02 1078 err_disable_pdev:
29c8d9eb Adit Ranadive 2016-10-02 1079 pci_disable_device(pdev);
29c8d9eb Adit Ranadive 2016-10-02 1080 pci_set_drvdata(pdev, NULL);
29c8d9eb Adit Ranadive 2016-10-02 1081 err_free_device:
29c8d9eb Adit Ranadive 2016-10-02 1082 mutex_lock(&pvrdma_device_list_lock);
29c8d9eb Adit Ranadive 2016-10-02 1083 list_del(&dev->device_link);
29c8d9eb Adit Ranadive 2016-10-02 1084 mutex_unlock(&pvrdma_device_list_lock);
29c8d9eb Adit Ranadive 2016-10-02 1085 ib_dealloc_device(&dev->ib_dev);
29c8d9eb Adit Ranadive 2016-10-02 1086 return ret;
29c8d9eb Adit Ranadive 2016-10-02 1087 }
29c8d9eb Adit Ranadive 2016-10-02 1088

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