Hello Christoph Hellwig, The patch 4167b2ad5182: "PCI: Remove NULL device handling from PCI DMA API" from Jan 10, 2018, leads to the following static checker warning:
drivers/net/ethernet/amd/pcnet32.c:1921 pcnet32_probe1() warn: variable dereferenced before check 'pdev' (see line 1843) drivers/net/ethernet/amd/pcnet32.c 1839 1840 dev->base_addr = ioaddr; 1841 lp = netdev_priv(dev); 1842 /* pci_alloc_consistent returns page-aligned memory, so we do not have to check the alignment */ 1843 lp->init_block = pci_alloc_consistent(pdev, sizeof(*lp->init_block), ^^^^ This function is called with a NULL "pdev" when we're probing from pcnet32_probe_vlbus(). 1844 &lp->init_dma_addr); 1845 if (!lp->init_block) { 1846 if (pcnet32_debug & NETIF_MSG_PROBE) 1847 pr_err("Consistent memory allocation failed\n"); 1848 ret = -ENOMEM; 1849 goto err_free_netdev; 1850 } 1851 lp->pci_dev = pdev; 1852 1853 lp->dev = dev; 1854 regards, dan carpenter