disable FB

hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/soc/fsl/qe/qe_common.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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  * Common CPM code
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  *
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@@ -11,10 +12,6 @@
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  * Copyright (c) 2000 MontaVista Software, Inc (source@mvista.com)
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  * 2006 (c) MontaVista Software, Inc.
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  * Vitaly Bordug <vbordug@ru.mvista.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 version 2 of the GNU General Public License as
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- * published by the Free Software Foundation.
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  */
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 #include <linux/genalloc.h>
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 #include <linux/init.h>
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@@ -35,7 +32,7 @@
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32
 
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 struct muram_block {
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 	struct list_head head;
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-	unsigned long start;
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+	s32 start;
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 	int size;
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 };
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@@ -49,7 +46,7 @@
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 {
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 	struct device_node *np;
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 	struct resource r;
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-	u32 zero[OF_MAX_ADDR_CELLS] = {};
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+	__be32 zero[OF_MAX_ADDR_CELLS] = {};
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 	resource_size_t max = 0;
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 	int i = 0;
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 	int ret = 0;
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@@ -113,34 +110,30 @@
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  * @algo: algorithm for alloc.
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  * @data: data for genalloc's algorithm.
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  *
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- * This function returns an offset into the muram area.
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+ * This function returns a non-negative offset into the muram area, or
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+ * a negative errno on failure.
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  */
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-static unsigned long cpm_muram_alloc_common(unsigned long size,
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-		genpool_algo_t algo, void *data)
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+static s32 cpm_muram_alloc_common(unsigned long size,
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+				  genpool_algo_t algo, void *data)
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 {
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 	struct muram_block *entry;
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-	unsigned long start;
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+	s32 start;
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-	if (!muram_pool && cpm_muram_init())
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-		goto out2;
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-
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-	start = gen_pool_alloc_algo(muram_pool, size, algo, data);
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-	if (!start)
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-		goto out2;
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-	start = start - GENPOOL_OFFSET;
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-	memset_io(cpm_muram_addr(start), 0, size);
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 	entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
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 	if (!entry)
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-		goto out1;
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+		return -ENOMEM;
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+	start = gen_pool_alloc_algo(muram_pool, size, algo, data);
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+	if (!start) {
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+		kfree(entry);
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+		return -ENOMEM;
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+	}
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+	start = start - GENPOOL_OFFSET;
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+	memset_io(cpm_muram_addr(start), 0, size);
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 	entry->start = start;
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 	entry->size = size;
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 	list_add(&entry->head, &muram_block_list);
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135
 
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 	return start;
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-out1:
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-	gen_pool_free(muram_pool, start, size);
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-out2:
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-	return (unsigned long)-ENOMEM;
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 }
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138
 
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 /*
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@@ -148,13 +141,14 @@
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  * @size: number of bytes to allocate
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  * @align: requested alignment, in bytes
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  *
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- * This function returns an offset into the muram area.
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+ * This function returns a non-negative offset into the muram area, or
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+ * a negative errno on failure.
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  * Use cpm_dpram_addr() to get the virtual address of the area.
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  * Use cpm_muram_free() to free the allocation.
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  */
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-unsigned long cpm_muram_alloc(unsigned long size, unsigned long align)
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+s32 cpm_muram_alloc(unsigned long size, unsigned long align)
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 {
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-	unsigned long start;
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+	s32 start;
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 	unsigned long flags;
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 	struct genpool_data_align muram_pool_data;
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@@ -171,11 +165,14 @@
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  * cpm_muram_free - free a chunk of multi-user ram
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  * @offset: The beginning of the chunk as returned by cpm_muram_alloc().
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  */
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-int cpm_muram_free(unsigned long offset)
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+void cpm_muram_free(s32 offset)
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 {
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 	unsigned long flags;
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 	int size;
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 	struct muram_block *tmp;
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+
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+	if (offset < 0)
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+		return;
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 	size = 0;
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 	spin_lock_irqsave(&cpm_muram_lock, flags);
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@@ -189,7 +186,6 @@
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 	}
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 	gen_pool_free(muram_pool, offset + GENPOOL_OFFSET, size);
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 	spin_unlock_irqrestore(&cpm_muram_lock, flags);
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-	return size;
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 }
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 EXPORT_SYMBOL(cpm_muram_free);
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191
 
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@@ -197,13 +193,14 @@
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  * cpm_muram_alloc_fixed - reserve a specific region of multi-user ram
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  * @offset: offset of allocation start address
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  * @size: number of bytes to allocate
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- * This function returns an offset into the muram area
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+ * This function returns @offset if the area was available, a negative
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+ * errno otherwise.
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  * Use cpm_dpram_addr() to get the virtual address of the area.
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  * Use cpm_muram_free() to free the allocation.
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  */
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-unsigned long cpm_muram_alloc_fixed(unsigned long offset, unsigned long size)
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+s32 cpm_muram_alloc_fixed(unsigned long offset, unsigned long size)
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 {
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-	unsigned long start;
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+	s32 start;
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 	unsigned long flags;
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 	struct genpool_data_fixed muram_pool_data_fixed;
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