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946bfd59a6
Refactoring of bcm47xx_nvram driver. It's used by bcm47xx and bcm53xx.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit 1c48eee5b2)
71 lines
2.1 KiB
Diff
71 lines
2.1 KiB
Diff
From f52da4ccfec9192e17f5c16260dfdd6d3ea76f65 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
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Date: Mon, 8 Mar 2021 10:03:20 +0100
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Subject: [PATCH] firmware: bcm47xx_nvram: inline code checking NVRAM size
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Separated function was not improving code quality much (or at all).
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Moreover it expected possible flash end address as argument and it was
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returning NVRAM size.
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The new code always operates on offsets which means less logic and less
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calculations.
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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
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---
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drivers/firmware/broadcom/bcm47xx_nvram.c | 25 +++++++----------------
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1 file changed, 7 insertions(+), 18 deletions(-)
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--- a/drivers/firmware/broadcom/bcm47xx_nvram.c
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+++ b/drivers/firmware/broadcom/bcm47xx_nvram.c
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@@ -42,18 +42,6 @@ static bool bcm47xx_nvram_is_valid(void
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return ((struct nvram_header *)nvram)->magic == NVRAM_MAGIC;
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}
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-static u32 find_nvram_size(void __iomem *end)
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-{
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- int i;
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-
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- for (i = 0; i < ARRAY_SIZE(nvram_sizes); i++) {
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- if (bcm47xx_nvram_is_valid(end - nvram_sizes[i]))
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- return nvram_sizes[i];
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- }
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-
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- return 0;
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-}
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-
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/**
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* bcm47xx_nvram_copy - copy NVRAM to internal buffer
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*/
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@@ -85,7 +73,7 @@ static int bcm47xx_nvram_find_and_copy(v
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{
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size_t flash_size;
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size_t offset;
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- u32 size;
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+ int i;
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if (nvram_len) {
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pr_warn("nvram already initialized\n");
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@@ -93,12 +81,13 @@ static int bcm47xx_nvram_find_and_copy(v
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}
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/* TODO: when nvram is on nand flash check for bad blocks first. */
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+
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+ /* Try every possible flash size and check for NVRAM at its end */
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for (flash_size = FLASH_MIN; flash_size <= res_size; flash_size <<= 1) {
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- /* Windowed flash access */
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- size = find_nvram_size(flash_start + flash_size);
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- if (size) {
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- offset = flash_size - size;
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- goto found;
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+ for (i = 0; i < ARRAY_SIZE(nvram_sizes); i++) {
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+ offset = flash_size - nvram_sizes[i];
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+ if (bcm47xx_nvram_is_valid(flash_start + offset))
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+ goto found;
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}
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}
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