[PATCH 188/222] mmc: sdhci: convert to new SDIO IRQ handling

@@ -2423,10 +2423,10 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
 
 static irqreturn_t sdhci_irq(int irq, void *dev_id)
 {
-	irqreturn_t result;
+	irqreturn_t result = IRQ_NONE;
 	struct sdhci_host *host = dev_id;
 	u32 intmask, mask, unexpected = 0;
-	int cardint = 0, max_loops = 16;
+	int max_loops = 16;
 
 	spin_lock(&host->lock);
 

@@ -2485,8 +2485,11 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id)
 			pr_err("%s: Card is consuming too much power!\n",
 				mmc_hostname(host->mmc));
 
-		if (intmask & SDHCI_INT_CARD_INT)
-			cardint = 1;
+		if (intmask & SDHCI_INT_CARD_INT) {
+			sdhci_enable_sdio_irq_nolock(host, false);
+			host->thread_isr |= SDHCI_INT_CARD_INT;
+			result = IRQ_WAKE_THREAD;
+		}
 
 		intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE |
 			     SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK |

@@ -2498,17 +2501,10 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id)
 			sdhci_writel(host, intmask, SDHCI_INT_STATUS);
 		}
 
-		result = IRQ_HANDLED;
+		if (result == IRQ_NONE)
+			result = IRQ_HANDLED;
 
 		intmask = sdhci_readl(host, SDHCI_INT_STATUS);
-
-		/*
-		 * If we know we'll call the driver to signal SDIO IRQ,
-		 * disregard further indications of Card Interrupt in
-		 * the status to avoid a needless loop.
-		 */
-		if (cardint)
-			intmask &= ~SDHCI_INT_CARD_INT;
 	} while (intmask && --max_loops);
 out:
 	spin_unlock(&host->lock);

@@ -2518,15 +2514,33 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id)
 			   mmc_hostname(host->mmc), unexpected);
 		sdhci_dumpregs(host);
 	}
-	/*
-	 * We have to delay this as it calls back into the driver.
-	 */
-	if (cardint)
-		mmc_signal_sdio_irq(host->mmc);
 
 	return result;
 }
 
+static irqreturn_t sdhci_thread_irq(int irq, void *dev_id)
+{
+	struct sdhci_host *host = dev_id;
+	unsigned long flags;
+	u32 isr;
+
+	spin_lock_irqsave(&host->lock, flags);
+	isr = host->thread_isr;
+	host->thread_isr = 0;
+	spin_unlock_irqrestore(&host->lock, flags);
+
+	if (isr & SDHCI_INT_CARD_INT) {
+		sdio_run_irqs(host->mmc);
+
+		spin_lock_irqsave(&host->lock, flags);
+		if (host->flags & SDHCI_SDIO_IRQ_ENABLED)
+			sdhci_enable_sdio_irq_nolock(host, true);
+		spin_unlock_irqrestore(&host->lock, flags);
+	}
+
+	return isr ? IRQ_HANDLED : IRQ_NONE;
+}
+
 /*****************************************************************************\
  *                                                                           *
  * Suspend/resume                                                            *

@@ -2596,8 +2610,9 @@ int sdhci_resume_host(struct sdhci_host *host)
 	}
 
 	if (!device_may_wakeup(mmc_dev(host->mmc))) {
-		ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED,
-				  mmc_hostname(host->mmc), host);
+		ret = request_threaded_irq(host->irq, sdhci_irq,
+					   sdhci_thread_irq, IRQF_SHARED,
+					   mmc_hostname(host->mmc), host);
 		if (ret)
 			return ret;
 	} else {

@@ -2676,7 +2691,7 @@ int sdhci_runtime_suspend_host(struct sdhci_host *host)
 	sdhci_mask_irqs(host, SDHCI_INT_ALL_MASK);
 	spin_unlock_irqrestore(&host->lock, flags);
 
-	synchronize_irq(host->irq);
+	synchronize_hardirq(host->irq);
 
 	spin_lock_irqsave(&host->lock, flags);
 	host->runtime_suspended = true;

@@ -2932,6 +2947,7 @@ int sdhci_add_host(struct sdhci_host *host)
 	mmc->max_busy_timeout = (1 << 27) / host->timeout_clk;
 
 	mmc->caps |= MMC_CAP_SDIO_IRQ | MMC_CAP_ERASE | MMC_CAP_CMD23;
+	mmc->caps2 |= MMC_CAP2_SDIO_IRQ_NOTHREAD;
 
 	if (host->quirks & SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12)
 		host->flags |= SDHCI_AUTO_CMD12;

@@ -3221,8 +3237,8 @@ int sdhci_add_host(struct sdhci_host *host)
 
 	sdhci_init(host, 0);
 
-	ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED,
-		mmc_hostname(mmc), host);
+	ret = request_threaded_irq(host->irq, sdhci_irq, sdhci_thread_irq,
+				   IRQF_SHARED,	mmc_hostname(mmc), host);
 	if (ret) {
 		pr_err("%s: Failed to request IRQ %d: %d\n",
 		       mmc_hostname(mmc), host->irq, ret);

@@ -177,6 +177,8 @@ struct sdhci_host {
 	unsigned int            ocr_avail_mmc;
 	u32 ocr_mask;		/* available voltages */
 
+	u32			thread_isr;
+
 	wait_queue_head_t	buf_ready_int;	/* Waitqueue for Buffer Read Ready interrupt */
 	unsigned int		tuning_done;	/* Condition flag set when CMD19 succeeds */