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2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/drivers/crypto/img-hash.c
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..
@@ -1,15 +1,13 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Copyright (c) 2014 Imagination Technologies
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  * Authors:  Will Thomas, James Hartley
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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 published
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- * by the Free Software Foundation.
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  *
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  *	Interface structure taken from omap-sham driver
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  */
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 #include <linux/clk.h>
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+#include <linux/dma-mapping.h>
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 #include <linux/dmaengine.h>
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 #include <linux/interrupt.h>
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 #include <linux/io.h>
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@@ -106,7 +104,7 @@
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 	struct ahash_request	fallback_req;
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 	/* Zero length buffer must remain last member of struct */
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-	u8 buffer[0] __aligned(sizeof(u32));
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+	u8 buffer[] __aligned(sizeof(u32));
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 };
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 struct img_hash_ctx {
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@@ -333,12 +331,12 @@
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 static int img_hash_dma_init(struct img_hash_dev *hdev)
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 {
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 	struct dma_slave_config dma_conf;
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-	int err = -EINVAL;
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+	int err;
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-	hdev->dma_lch = dma_request_slave_channel(hdev->dev, "tx");
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-	if (!hdev->dma_lch) {
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+	hdev->dma_lch = dma_request_chan(hdev->dev, "tx");
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+	if (IS_ERR(hdev->dma_lch)) {
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 		dev_err(hdev->dev, "Couldn't acquire a slave DMA channel.\n");
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-		return -EBUSY;
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+		return PTR_ERR(hdev->dma_lch);
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 	}
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 	dma_conf.direction = DMA_MEM_TO_DEV;
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 	dma_conf.dst_addr = hdev->bus_addr;
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@@ -359,12 +357,16 @@
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 static void img_hash_dma_task(unsigned long d)
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 {
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 	struct img_hash_dev *hdev = (struct img_hash_dev *)d;
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-	struct img_hash_request_ctx *ctx = ahash_request_ctx(hdev->req);
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+	struct img_hash_request_ctx *ctx;
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 	u8 *addr;
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 	size_t nbytes, bleft, wsend, len, tbc;
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 	struct scatterlist tsg;
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-	if (!hdev->req || !ctx->sg)
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+	if (!hdev->req)
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+		return;
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+
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+	ctx = ahash_request_ctx(hdev->req);
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+	if (!ctx->sg)
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 		return;
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 	addr = sg_virt(ctx->sg);
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@@ -961,9 +963,7 @@
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 	crypto_init_queue(&hdev->queue, IMG_HASH_QUEUE_LENGTH);
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 	/* Register bank */
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-	hash_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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-
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-	hdev->io_base = devm_ioremap_resource(dev, hash_res);
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+	hdev->io_base = devm_platform_ioremap_resource(pdev, 0);
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 	if (IS_ERR(hdev->io_base)) {
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 		err = PTR_ERR(hdev->io_base);
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 		dev_err(dev, "can't ioremap, returned %d\n", err);
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@@ -983,7 +983,6 @@
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 	irq = platform_get_irq(pdev, 0);
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 	if (irq < 0) {
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-		dev_err(dev, "no IRQ resource info\n");
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 		err = irq;
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 		goto res_err;
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 	}