add ax88772C AX88772C_eeprom_tools

hc

2024-05-10 61598093bbdd283a7edc367d900f223070ead8d2

 kernel/arch/arm/mach-mmp/sram.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/arch/arm/mach-mmp/sram.c
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  *
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@@ -7,11 +8,6 @@
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  *  All Rights Reserved
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  *
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  *  Add for mmp sram support - Leo Yan <leoy@marvell.com>
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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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 #include <linux/module.h>
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@@ -76,6 +72,8 @@
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 	if (!info)
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 		return -ENOMEM;
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+	platform_set_drvdata(pdev, info);
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+
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 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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 	if (res == NULL) {
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 		dev_err(&pdev->dev, "no memory resource defined\n");
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@@ -111,8 +109,6 @@
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 	list_add(&info->node, &sram_bank_list);
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 	mutex_unlock(&sram_lock);
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-	platform_set_drvdata(pdev, info);
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-
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 	dev_info(&pdev->dev, "initialized\n");
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 	return 0;
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@@ -131,17 +127,19 @@
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 	struct sram_bank_info *info;
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 	info = platform_get_drvdata(pdev);
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-	if (info == NULL)
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-		return -ENODEV;
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-	mutex_lock(&sram_lock);
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-	list_del(&info->node);
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-	mutex_unlock(&sram_lock);
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+	if (info->sram_size) {
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+		mutex_lock(&sram_lock);
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+		list_del(&info->node);
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+		mutex_unlock(&sram_lock);
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-	gen_pool_destroy(info->gpool);
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-	iounmap(info->sram_virt);
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-	kfree(info->pool_name);
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+		gen_pool_destroy(info->gpool);
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+		iounmap(info->sram_virt);
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+		kfree(info->pool_name);
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+	}
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+
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 	kfree(info);
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+
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 	return 0;
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 }
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