On 2019/11/18 9:21, Frederick Lawler wrote:
> Commit 8c0d3a02c130 ("PCI: Add accessors for PCI Express Capability")
> added accessors for the PCI Express Capability so that drivers didn't
> need to be aware of differences between v1 and v2 of the PCI
> Express Capability.
>
> Replace pci_read_config_word() and pci_write_config_word() calls with
> pcie_capability_read_word() and pcie_capability_write_word().
>
> Signed-off-by: Frederick Lawler <fred@xxxxxxxxxxxx>
> ---
> drivers/block/skd_main.c | 8 ++------
> 1 file changed, 2 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/block/skd_main.c b/drivers/block/skd_main.c
> index 51569c199a6c..f25f6ef6b4c7 100644
> --- a/drivers/block/skd_main.c
> +++ b/drivers/block/skd_main.c
> @@ -3134,18 +3134,14 @@ MODULE_DEVICE_TABLE(pci, skd_pci_tbl);
>
> static char *skd_pci_info(struct skd_device *skdev, char *str)
> {
> - int pcie_reg;
> -
> strcpy(str, "PCIe (");
> - pcie_reg = pci_find_capability(skdev->pdev, PCI_CAP_ID_EXP);
>
> - if (pcie_reg) {
> + if (pci_is_pcie(skdev->pdev)) {
Maybe return early here ? The reason is that if pci_is_pcie() is false,
then the string "PCIe (" is not terminated with a closing parenthesis.
So something like:
if (!pci_is_pcie(skdev->pdev)) {
strcat(str, ")");
return str;
}
May be better. Note that the "return str" is also rather pointless since
it is not used by the caller of skd_pci_info().
>
> char lwstr[6];
> uint16_t pcie_lstat, lspeed, lwidth;
>
> - pcie_reg += 0x12;
> - pci_read_config_word(skdev->pdev, pcie_reg, &pcie_lstat);
> + pcie_capability_read_word(skdev->pdev, 0x12, &pcie_lstat);
> lspeed = pcie_lstat & (0xF);
> lwidth = (pcie_lstat & 0x3F0) >> 4;
>
>
--
Damien Le Moal
Western Digital Research
