[2/3] mmc: sdio: don't reinitialize nonremovable powered-resumed cards

Commit Message

Ohad Ben Cohen Nov. 28, 2010, 5:21 a.m. UTC

None

Patch

diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index efef5f9..b424fbe 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);
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 381c77f..30b6fb9 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -317,5 +317,10 @@  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