2 files changed, 40 insertions, 21 deletions

diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index 8dd8fc32ecca..26cabd53ddc5 100644
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -951,6 +951,8 @@ static int mmc_sdio_pre_suspend(struct mmc_host *host)
  */
 static int mmc_sdio_suspend(struct mmc_host *host)
 {
+	WARN_ON(host->sdio_irqs && !mmc_card_keep_power(host));
+
 	/* Prevent processing of SDIO IRQs in suspended state. */
 	mmc_card_set_suspended(host->card);
 	cancel_delayed_work_sync(&host->sdio_irq_work);
@@ -1013,7 +1015,7 @@ static int mmc_sdio_resume(struct mmc_host *host)
 		if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD))
 			wake_up_process(host->sdio_irq_thread);
 		else if (host->caps & MMC_CAP_SDIO_IRQ)
-			host->ops->enable_sdio_irq(host, 1);
+			queue_delayed_work(system_wq, &host->sdio_irq_work, 0);
 	}
 
 out:
diff --git a/drivers/mmc/core/sdio_irq.c b/drivers/mmc/core/sdio_irq.c
index 0bcc5e83bd1a..900871073bd7 100644
--- a/drivers/mmc/core/sdio_irq.c
+++ b/drivers/mmc/core/sdio_irq.c
@@ -27,10 +27,39 @@
 #include "core.h"
 #include "card.h"
 
+static int sdio_get_pending_irqs(struct mmc_host *host, u8 *pending)
+{
+	struct mmc_card *card = host->card;
+	int ret;
+
+	WARN_ON(!host->claimed);
+
+	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_INTx, 0, pending);
+	if (ret) {
+		pr_debug("%s: error %d reading SDIO_CCCR_INTx\n",
+		       mmc_card_id(card), ret);
+		return ret;
+	}
+
+	if (*pending && mmc_card_broken_irq_polling(card) &&
+	    !(host->caps & MMC_CAP_SDIO_IRQ)) {
+		unsigned char dummy;
+
+		/* A fake interrupt could be created when we poll SDIO_CCCR_INTx
+		 * register with a Marvell SD8797 card. A dummy CMD52 read to
+		 * function 0 register 0xff can avoid this.
+		 */
+		mmc_io_rw_direct(card, 0, 0, 0xff, 0, &dummy);
+	}
+
+	return 0;
+}
+
 static int process_sdio_pending_irqs(struct mmc_host *host)
 {
 	struct mmc_card *card = host->card;
 	int i, ret, count;
+	bool sdio_irq_pending = host->sdio_irq_pending;
 	unsigned char pending;
 	struct sdio_func *func;
 
@@ -38,34 +67,23 @@ static int process_sdio_pending_irqs(struct mmc_host *host)
 	if (mmc_card_suspended(card))
 		return 0;
 
+	/* Clear the flag to indicate that we have processed the IRQ. */
+	host->sdio_irq_pending = false;
+
 	/*
 	 * Optimization, if there is only 1 function interrupt registered
 	 * and we know an IRQ was signaled then call irq handler directly.
 	 * Otherwise do the full probe.
 	 */
 	func = card->sdio_single_irq;
-	if (func && host->sdio_irq_pending) {
+	if (func && sdio_irq_pending) {
 		func->irq_handler(func);
 		return 1;
 	}
 
-	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_INTx, 0, &pending);
-	if (ret) {
-		pr_debug("%s: error %d reading SDIO_CCCR_INTx\n",
-		       mmc_card_id(card), ret);
+	ret = sdio_get_pending_irqs(host, &pending);
+	if (ret)
 		return ret;
-	}
-
-	if (pending && mmc_card_broken_irq_polling(card) &&
-	    !(host->caps & MMC_CAP_SDIO_IRQ)) {
-		unsigned char dummy;
-
-		/* A fake interrupt could be created when we poll SDIO_CCCR_INTx
-		 * register with a Marvell SD8797 card. A dummy CMD52 read to
-		 * function 0 register 0xff can avoid this.
-		 */
-		mmc_io_rw_direct(card, 0, 0, 0xff, 0, &dummy);
-	}
 
 	count = 0;
 	for (i = 1; i <= 7; i++) {
@@ -96,9 +114,8 @@ static void sdio_run_irqs(struct mmc_host *host)
 {
 	mmc_claim_host(host);
 	if (host->sdio_irqs) {
-		host->sdio_irq_pending = true;
 		process_sdio_pending_irqs(host);
-		if (host->ops->ack_sdio_irq)
+		if (!host->sdio_irq_pending)
 			host->ops->ack_sdio_irq(host);
 	}
 	mmc_release_host(host);
@@ -114,6 +131,7 @@ void sdio_irq_work(struct work_struct *work)
 
 void sdio_signal_irq(struct mmc_host *host)
 {
+	host->sdio_irq_pending = true;
 	queue_delayed_work(system_wq, &host->sdio_irq_work, 0);
 }
 EXPORT_SYMBOL_GPL(sdio_signal_irq);
@@ -159,7 +177,6 @@ static int sdio_irq_thread(void *_host)
 		if (ret)
 			break;
 		ret = process_sdio_pending_irqs(host);
-		host->sdio_irq_pending = false;
 		mmc_release_host(host);
 
 		/*