diff options
| author | Guenter Roeck <linux@roeck-us.net> | 2021-04-05 21:29:22 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-28 12:05:46 +0200 |
| commit | 8dc8a0021fd8a16e1c994a4e2553a100fdad50b5 (patch) | |
| tree | 899eb198d4eee5d16c1d3782748dd03197554bc0 /drivers/net | |
| parent | f803e37721125e03478a7a7a75162f584bb72055 (diff) | |
pcnet32: Use pci_resource_len to validate PCI resource
[ Upstream commit 66c3f05ddc538ee796321210c906b6ae6fc0792a ]
pci_resource_start() is not a good indicator to determine if a PCI
resource exists or not, since the resource may start at address 0.
This is seen when trying to instantiate the driver in qemu for riscv32
or riscv64.
pci 0000:00:01.0: reg 0x10: [io 0x0000-0x001f]
pci 0000:00:01.0: reg 0x14: [mem 0x00000000-0x0000001f]
...
pcnet32: card has no PCI IO resources, aborting
Use pci_resouce_len() instead.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/amd/pcnet32.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/net/ethernet/amd/pcnet32.c b/drivers/net/ethernet/amd/pcnet32.c index 7ccebae9cb48..b305903c91c4 100644 --- a/drivers/net/ethernet/amd/pcnet32.c +++ b/drivers/net/ethernet/amd/pcnet32.c @@ -1493,8 +1493,7 @@ pcnet32_probe_pci(struct pci_dev *pdev, const struct pci_device_id *ent) } pci_set_master(pdev); - ioaddr = pci_resource_start(pdev, 0); - if (!ioaddr) { + if (!pci_resource_len(pdev, 0)) { if (pcnet32_debug & NETIF_MSG_PROBE) pr_err("card has no PCI IO resources, aborting\n"); return -ENODEV; @@ -1506,6 +1505,8 @@ pcnet32_probe_pci(struct pci_dev *pdev, const struct pci_device_id *ent) pr_err("architecture does not support 32bit PCI busmaster DMA\n"); return err; } + + ioaddr = pci_resource_start(pdev, 0); if (!request_region(ioaddr, PCNET32_TOTAL_SIZE, "pcnet32_probe_pci")) { if (pcnet32_debug & NETIF_MSG_PROBE) pr_err("io address range already allocated\n"); |