On 09/03/18 16:04, ernest.zhang wrote:
> Add MSI interrupt support if the SD host device can support MSI interrupt.
>
> Changes: Enable MSI interrupt if the MSI capability bit is set in
> capability register.
>
> Signed-off-by: ernest.zhang <ernest.zhang@xxxxxxxxxxxxxx>
> ---
> drivers/mmc/host/sdhci-pci-o2micro.c | 17 +++++++++++++++++
> 1 file changed, 17 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-pci-o2micro.c b/drivers/mmc/host/sdhci-pci-o2micro.c
> index a918984..7d04f4b 100644
> --- a/drivers/mmc/host/sdhci-pci-o2micro.c
> +++ b/drivers/mmc/host/sdhci-pci-o2micro.c
> @@ -391,6 +391,23 @@ int sdhci_pci_o2_probe_slot(struct sdhci_pci_slot *slot)
> if (reg & 0x1)
> host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;
>
> +#if defined(CONFIG_PCI_MSI)
Do you really need to check CONFIG_PCI_MSI ?
> + if (pci_find_capability(chip->pdev, PCI_CAP_ID_MSI)) {
> + ret = pci_enable_msi(chip->pdev);
> + if (!ret) {
> + host->irq = chip->pdev->irq;
> + pr_info("%s: use MSI irq, irq=%d\n",
> + mmc_hostname(host->mmc), host->irq);
> + } else {
> + pr_err("%s: enable PCI MSI failed, err=%d\n",
> + mmc_hostname(host->mmc), ret);
> + }
> + } else {
> + pr_info("%s: unsupport msi, use INTx irq\n",
> + mmc_hostname(host->mmc));
> + }
> +#endif
> +
> if (chip->pdev->device == PCI_DEVICE_ID_O2_SEABIRD0) {
> ret = pci_read_config_dword(chip->pdev,
> O2_SD_MISC_SETTING, ®);
>
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