Merge tag 'mmc-v4.10-3' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc

Pull MMC fixes from Ulf Hansson:
 "MMC core:
   - further fix thread wake-up for requests
   - use a bounce buffer to fix DMA issue for SSR register read

  MMC host:
   - sdhci: Fix a regression for runtime PM
   - sdhci-cadence: Add a proper SoC specific DT compatible"

* tag 'mmc-v4.10-3' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: sd: Meet alignment requirements for raw_ssr DMA
  mmc: core: Further fix thread wake-up
  mmc: sdhci: Fix to handle MMC_POWER_UNDEFINED
  mmc: sdhci-cadence: add Socionext UniPhier specific compatible string

Documentation/devicetree/bindings/mmc/sdhci-cadence.txt

@@ -1,7 +1,9 @@
 * Cadence SD/SDIO/eMMC Host Controller
 
 Required properties:
-- compatible: should be "cdns,sd4hc".
+- compatible: should be one of the following:
+    "cdns,sd4hc"               - default of the IP
+    "socionext,uniphier-sd4hc" - for Socionext UniPhier SoCs
 - reg: offset and length of the register set for the device.
 - interrupts: a single interrupt specifier.
 - clocks: phandle to the input clock.
@@ -19,7 +21,7 @@ if supported.  See mmc.txt for details.
 
 Example:
 	emmc: sdhci@5a000000 {
-		compatible = "cdns,sd4hc";
+		compatible = "socionext,uniphier-sd4hc", "cdns,sd4hc";
 		reg = <0x5a000000 0x400>;
 		interrupts = <0 78 4>;
 		clocks = <&clk 4>;

drivers/mmc/core/core.c

@@ -496,8 +496,7 @@ static int __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq)
  * Returns enum mmc_blk_status after checking errors.
  */
 static enum mmc_blk_status mmc_wait_for_data_req_done(struct mmc_host *host,
-				      struct mmc_request *mrq,
-				      struct mmc_async_req *next_req)
+						      struct mmc_request *mrq)
 {
 	struct mmc_command *cmd;
 	struct mmc_context_info *context_info = &host->context_info;
@@ -507,7 +506,7 @@ static enum mmc_blk_status mmc_wait_for_data_req_done(struct mmc_host *host,
 		wait_event_interruptible(context_info->wait,
 				(context_info->is_done_rcv ||
 				 context_info->is_new_req));
-		context_info->is_waiting_last_req = false;
+
 		if (context_info->is_done_rcv) {
 			context_info->is_done_rcv = false;
 			cmd = mrq->cmd;
@@ -527,10 +526,9 @@ static enum mmc_blk_status mmc_wait_for_data_req_done(struct mmc_host *host,
 				__mmc_start_request(host, mrq);
 				continue; /* wait for done/new event again */
 			}
-		} else if (context_info->is_new_req) {
-			if (!next_req)
-				return MMC_BLK_NEW_REQUEST;
 		}
+
+		return MMC_BLK_NEW_REQUEST;
 	}
 	mmc_retune_release(host);
 	return status;
@@ -660,7 +658,7 @@ struct mmc_async_req *mmc_start_req(struct mmc_host *host,
 		mmc_pre_req(host, areq->mrq);
 
 	if (host->areq) {
-		status = mmc_wait_for_data_req_done(host, host->areq->mrq, areq);
+		status = mmc_wait_for_data_req_done(host, host->areq->mrq);
 		if (status == MMC_BLK_NEW_REQUEST) {
 			if (ret_stat)
 				*ret_stat = status;

drivers/mmc/core/sd.c

@@ -223,6 +223,7 @@ static int mmc_decode_scr(struct mmc_card *card)
 static int mmc_read_ssr(struct mmc_card *card)
 {
 	unsigned int au, es, et, eo;
+	u32 *raw_ssr;
 	int i;
 
 	if (!(card->csd.cmdclass & CCC_APP_SPEC)) {
@@ -231,14 +232,21 @@ static int mmc_read_ssr(struct mmc_card *card)
 		return 0;
 	}
 
-	if (mmc_app_sd_status(card, card->raw_ssr)) {
+	raw_ssr = kmalloc(sizeof(card->raw_ssr), GFP_KERNEL);
+	if (!raw_ssr)
+		return -ENOMEM;
+
+	if (mmc_app_sd_status(card, raw_ssr)) {
 		pr_warn("%s: problem reading SD Status register\n",
 			mmc_hostname(card->host));
+		kfree(raw_ssr);
 		return 0;
 	}
 
 	for (i = 0; i < 16; i++)
-		card->raw_ssr[i] = be32_to_cpu(card->raw_ssr[i]);
+		card->raw_ssr[i] = be32_to_cpu(raw_ssr[i]);
+
+	kfree(raw_ssr);
 
 	/*
 	 * UNSTUFF_BITS only works with four u32s so we have to offset the

drivers/mmc/host/sdhci-cadence.c

@@ -262,6 +262,7 @@ disable_clk:
 }
 
 static const struct of_device_id sdhci_cdns_match[] = {
+	{ .compatible = "socionext,uniphier-sd4hc" },
 	{ .compatible = "cdns,sd4hc" },
 	{ /* sentinel */ }
 };

drivers/mmc/host/sdhci.c

@@ -1576,6 +1576,9 @@ static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 	unsigned long flags;
 	u8 ctrl;
 
+	if (ios->power_mode == MMC_POWER_UNDEFINED)
+		return;
+
 	spin_lock_irqsave(&host->lock, flags);
 
 	if (host->flags & SDHCI_DEVICE_DEAD) {
@@ -2938,22 +2941,24 @@ int sdhci_runtime_resume_host(struct sdhci_host *host)
 
 	sdhci_init(host, 0);
 
-	/* Force clock and power re-program */
-	host->pwr = 0;
-	host->clock = 0;
-	mmc->ops->start_signal_voltage_switch(mmc, &mmc->ios);
-	mmc->ops->set_ios(mmc, &mmc->ios);
+	if (mmc->ios.power_mode != MMC_POWER_UNDEFINED) {
+		/* Force clock and power re-program */
+		host->pwr = 0;
+		host->clock = 0;
+		mmc->ops->start_signal_voltage_switch(mmc, &mmc->ios);
+		mmc->ops->set_ios(mmc, &mmc->ios);
 
-	if ((host_flags & SDHCI_PV_ENABLED) &&
-		!(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN)) {
-		spin_lock_irqsave(&host->lock, flags);
-		sdhci_enable_preset_value(host, true);
-		spin_unlock_irqrestore(&host->lock, flags);
-	}
+		if ((host_flags & SDHCI_PV_ENABLED) &&
+		    !(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN)) {
+			spin_lock_irqsave(&host->lock, flags);
+			sdhci_enable_preset_value(host, true);
+			spin_unlock_irqrestore(&host->lock, flags);
+		}
 
-	if ((mmc->caps2 & MMC_CAP2_HS400_ES) &&
-	    mmc->ops->hs400_enhanced_strobe)
-		mmc->ops->hs400_enhanced_strobe(mmc, &mmc->ios);
+		if ((mmc->caps2 & MMC_CAP2_HS400_ES) &&
+		    mmc->ops->hs400_enhanced_strobe)
+			mmc->ops->hs400_enhanced_strobe(mmc, &mmc->ios);
+	}
 
 	spin_lock_irqsave(&host->lock, flags);