On 28/12/11 05:11, Aaron Lu wrote:
> If there are errors happened in sdhci_suspend_host, handle it so that
> when the function returns with error, the host's behaviour is the same
> before this function call, e.g. card detection is enabled and tuning
> timer is active, etc.
>
> Previously, sdhci_suspend_host will return the error code and rely on
> the calling function to handle it. sdhci-pci will handle it in
> sdhci_pci_suspend while sdhci-platform code will not.
>
> Signed-off-by: Philip Rakity <prak...@marvell.com>
> Signed-off-by: Aaron Lu <aaron...@amd.com>
> ---
> drivers/mmc/host/sdhci-pci.c | 9 ++-------
> drivers/mmc/host/sdhci.c | 27 +++++++++++++++++++++------
> 2 files changed, 23 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
> index d2e77fb..494d14b 100644
> --- a/drivers/mmc/host/sdhci-pci.c
> +++ b/drivers/mmc/host/sdhci-pci.c
> @@ -1013,7 +1013,7 @@ static int sdhci_pci_suspend(struct device *dev)
> ret = sdhci_suspend_host(slot->host);
>
> if (ret)
> - goto err_pci_suspend;
> + return ret;
>
> slot_pm_flags = slot->host->mmc->pm_flags;
> if (slot_pm_flags & MMC_PM_WAKE_SDIO_IRQ)
> @@ -1025,7 +1025,7 @@ static int sdhci_pci_suspend(struct device *dev)
> if (chip->fixes && chip->fixes->suspend) {
> ret = chip->fixes->suspend(chip);
> if (ret)
> - goto err_pci_suspend;
> + return ret;
> }
>
> pci_save_state(pdev);
> @@ -1042,11 +1042,6 @@ static int sdhci_pci_suspend(struct device *dev)
> }
>
> return 0;
> -
> -err_pci_suspend:
> - while (--i >= 0)
> - sdhci_resume_host(chip->slots[i]->host);
> - return ret;
This doesn't look right. This is about having multiple
host controllers on the same PCI device. If those
hosts have been successfully suspended, then they must
be resumed on error.
> }
>
> static int sdhci_pci_resume(struct device *dev)
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index 2007d37..37aeb81 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -2339,25 +2339,40 @@ out:
>
> int sdhci_suspend_host(struct sdhci_host *host)
> {
> - int ret;
> + int ret, has_tuning_timer;
>
> sdhci_disable_card_detection(host);
>
> /* Disable tuning since we are suspending */
> - if (host->version >= SDHCI_SPEC_300 && host->tuning_count &&
> - host->tuning_mode == SDHCI_TUNING_MODE_1) {
> + has_tuning_timer = host->version >= SDHCI_SPEC_300 &&
> + host->tuning_count && host->tuning_mode == SDHCI_TUNING_MODE_1;
> + if (has_tuning_timer) {
> del_timer_sync(&host->tuning_timer);
> host->flags &= ~SDHCI_NEEDS_RETUNING;
> }
>
> ret = mmc_suspend_host(host->mmc);
> if (ret)
> - return ret;
> + goto err_suspend;
> +
> + if (host->vmmc) {
> + ret = regulator_disable(host->vmmc);
> + if (ret)
> + goto err_suspend;
> + }
>
> free_irq(host->irq, host);
>
> - if (host->vmmc)
> - ret = regulator_disable(host->vmmc);
> + return 0;
> +
> +err_suspend:
> + if (has_tuning_timer) {
> + host->flags |= SDHCI_NEEDS_RETUNING;
> + mod_timer(&host->tuning_timer, jiffies +
> + host->tuning_count * HZ);
> + }
> +
> + sdhci_enable_card_detection(host);
>
> return ret;
> }
--
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