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-rw-r--r--drivers/mmc/core/sdio.c16
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index c18810ab646..82f4b900898 100644
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -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);
- err = mmc_sdio_init_card(host, host->ocr, host->card,
+
+ /* 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);