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2023-12-09 95099d4622f8cb224d94e314c7a8e0df60b13f87

 kernel/drivers/mmc/host/mxcmmc.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  *  linux/drivers/mmc/host/mxcmmc.c - Freescale i.MX MMCI driver
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  *
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@@ -10,11 +11,6 @@
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  *  Copyright (C) 2006 Pavel Pisa, PiKRON <ppisa@pikron.com>
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  *
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  *  derived from pxamci.c by Russell King
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 as
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- * published by the Free Software Foundation.
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- *
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  */
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15
 
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 #include <linux/module.h>
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@@ -31,14 +27,12 @@
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 #include <linux/delay.h>
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 #include <linux/clk.h>
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 #include <linux/io.h>
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-#include <linux/gpio.h>
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 #include <linux/regulator/consumer.h>
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 #include <linux/dmaengine.h>
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 #include <linux/types.h>
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 #include <linux/of.h>
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 #include <linux/of_device.h>
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 #include <linux/of_dma.h>
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-#include <linux/of_gpio.h>
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 #include <linux/mmc/slot-gpio.h>
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37
 
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 #include <asm/dma.h>
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@@ -720,7 +714,6 @@
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 static irqreturn_t mxcmci_irq(int irq, void *devid)
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 {
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 	struct mxcmci_host *host = devid;
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-	unsigned long flags;
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 	bool sdio_irq;
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 	u32 stat;
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719
 
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@@ -732,9 +725,9 @@
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 	dev_dbg(mmc_dev(host->mmc), "%s: 0x%08x\n", __func__, stat);
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-	spin_lock_irqsave(&host->lock, flags);
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+	spin_lock(&host->lock);
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 	sdio_irq = (stat & STATUS_SDIO_INT_ACTIVE) && host->use_sdio;
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-	spin_unlock_irqrestore(&host->lock, flags);
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+	spin_unlock(&host->lock);
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 	if (mxcmci_use_dma(host) && (stat & (STATUS_WRITE_OP_DONE)))
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 		mxcmci_writel(host, STATUS_WRITE_OP_DONE, MMC_REG_STATUS);
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@@ -1017,10 +1010,8 @@
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 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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 	irq = platform_get_irq(pdev, 0);
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-	if (irq < 0) {
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-		dev_err(&pdev->dev, "failed to get IRQ: %d\n", irq);
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+	if (irq < 0)
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 		return irq;
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-	}
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1015
 
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 	mmc = mmc_alloc_host(sizeof(*host), &pdev->dev);
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 	if (!mmc)
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@@ -1130,7 +1121,16 @@
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 	mxcmci_writel(host, host->default_irq_mask, MMC_REG_INT_CNTR);
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 	if (!host->pdata) {
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-		host->dma = dma_request_slave_channel(&pdev->dev, "rx-tx");
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+		host->dma = dma_request_chan(&pdev->dev, "rx-tx");
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+		if (IS_ERR(host->dma)) {
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+			if (PTR_ERR(host->dma) == -EPROBE_DEFER) {
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+				ret = -EPROBE_DEFER;
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+				goto out_clk_put;
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+			}
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+
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+			/* Ignore errors to fall back to PIO mode */
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+			host->dma = NULL;
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+		}
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 	} else {
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 		res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
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 		if (res) {
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@@ -1244,6 +1244,7 @@
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 	.id_table	= mxcmci_devtype,
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 	.driver		= {
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 		.name		= DRIVER_NAME,
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+		.probe_type	= PROBE_PREFER_ASYNCHRONOUS,
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 		.pm	= &mxcmci_pm_ops,
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 		.of_match_table	= mxcmci_of_match,
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 	}