Commit 080bc977 authored by Ohad Ben-Cohen's avatar Ohad Ben-Cohen Committed by Chris Ball

mmc: sdio: don't reinitialize nonremovable powered-resumed cards

Upon system resume, SDIO core must reinitialize cards that were
powered off during suspend.

If the card had its power kept during suspend (and thus it is
'powered-resumed'), SDIO core performs only a limited reinitializing,
mainly needed to make sure that the card wasn't removed/replaced.

If a __nonremovable__ card is powered-resumed, we can safely skip the
reinitializing phase.

Note: 9b966aae (mmc: sdio: fully reconfigure oldcard on resume) removed
the bus width reconfiguration since mmc_sdio_init_card already does it.
It is brought back now in case mmc_sdio_init_card is skipped.
Signed-off-by: default avatarOhad Ben-Cohen <ohad@wizery.com>
Signed-off-by: default avatarChris Ball <cjb@laptop.org>
parent e594573d
......@@ -627,15 +627,27 @@ static int mmc_sdio_suspend(struct mmc_host *host)
static int mmc_sdio_resume(struct mmc_host *host)
{
int i, err;
int i, err = 0;
BUG_ON(!host);
BUG_ON(!host->card);
/* Basic card reinitialization. */
mmc_claim_host(host);
/* No need to reinitialize powered-resumed nonremovable cards */
if (mmc_card_is_removable(host) || !mmc_card_is_powered_resumed(host))
err = mmc_sdio_init_card(host, host->ocr, host->card,
(host->pm_flags & MMC_PM_KEEP_POWER));
else if (mmc_card_is_powered_resumed(host)) {
/* We may have switched to 1-bit mode during suspend */
err = sdio_enable_4bit_bus(host->card);
if (err > 0) {
mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
err = 0;
}
}
if (!err && host->sdio_irqs)
mmc_signal_sdio_irq(host);
mmc_release_host(host);
......
......@@ -320,5 +320,10 @@ static inline int mmc_card_is_removable(struct mmc_host *host)
return !(host->caps & MMC_CAP_NONREMOVABLE) && mmc_assume_removable;
}
static inline int mmc_card_is_powered_resumed(struct mmc_host *host)
{
return host->pm_flags & MMC_PM_KEEP_POWER;
}
#endif
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