Merge tag 'mmc-v5.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc

Pull MMC fixes from Ulf Hansson:
 "MMC core:
   - Fix support for SD Power off notification

  MMC host:
   - moxart: Fix potential use-after-free on remove path
   - sdhci-of-esdhc: Fix error path when setting dma mask
   - sh_mmcif: Fix potential NULL pointer dereference"

* tag 'mmc-v5.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  moxart: fix potential use-after-free on remove path
  mmc: core: Wait for command setting 'Power Off Notification' bit to complete
  mmc: sh_mmcif: Check for null res pointer
  mmc: sdhci-of-esdhc: Check for error num after setting mask

Author: torvalds

drivers/mmc/core/sd.c

@@ -67,7 +67,7 @@ static const unsigned int sd_au_size[] = {
 		__res & __mask;						\
 	})
 
-#define SD_POWEROFF_NOTIFY_TIMEOUT_MS 2000
+#define SD_POWEROFF_NOTIFY_TIMEOUT_MS 1000
 #define SD_WRITE_EXTR_SINGLE_TIMEOUT_MS 1000
 
 struct sd_busy_data {
@@ -1664,6 +1664,12 @@ static int sd_poweroff_notify(struct mmc_card *card)
 		goto out;
 	}
 
+	/* Find out when the command is completed. */
+	err = mmc_poll_for_busy(card, SD_WRITE_EXTR_SINGLE_TIMEOUT_MS, false,
+				MMC_BUSY_EXTR_SINGLE);
+	if (err)
+		goto out;
+
 	cb_data.card = card;
 	cb_data.reg_buf = reg_buf;
 	err = __mmc_poll_for_busy(card->host, SD_POWEROFF_NOTIFY_TIMEOUT_MS,

drivers/mmc/host/moxart-mmc.c

@@ -705,12 +705,12 @@ static int moxart_remove(struct platform_device *pdev)
 	if (!IS_ERR_OR_NULL(host->dma_chan_rx))
 		dma_release_channel(host->dma_chan_rx);
 	mmc_remove_host(mmc);
-	mmc_free_host(mmc);
 
 	writel(0, host->base + REG_INTERRUPT_MASK);
 	writel(0, host->base + REG_POWER_CONTROL);
 	writel(readl(host->base + REG_CLOCK_CONTROL) | CLK_OFF,
 	       host->base + REG_CLOCK_CONTROL);
+	mmc_free_host(mmc);
 
 	return 0;
 }

drivers/mmc/host/sdhci-of-esdhc.c

@@ -524,12 +524,16 @@ static void esdhc_of_adma_workaround(struct sdhci_host *host, u32 intmask)
 
 static int esdhc_of_enable_dma(struct sdhci_host *host)
 {
+	int ret;
 	u32 value;
 	struct device *dev = mmc_dev(host->mmc);
 
 	if (of_device_is_compatible(dev->of_node, "fsl,ls1043a-esdhc") ||
-	    of_device_is_compatible(dev->of_node, "fsl,ls1046a-esdhc"))
-		dma_set_mask_and_coherent(dev, DMA_BIT_MASK(40));
+	    of_device_is_compatible(dev->of_node, "fsl,ls1046a-esdhc")) {
+		ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(40));
+		if (ret)
+			return ret;
+	}
 
 	value = sdhci_readl(host, ESDHC_DMA_SYSCTL);
 

drivers/mmc/host/sh_mmcif.c

@@ -405,6 +405,9 @@ static int sh_mmcif_dma_slave_config(struct sh_mmcif_host *host,
 	struct dma_slave_config cfg = { 0, };
 
 	res = platform_get_resource(host->pd, IORESOURCE_MEM, 0);
+	if (!res)
+		return -EINVAL;
+
 	cfg.direction = direction;
 
 	if (direction == DMA_DEV_TO_MEM) {