diff options
Diffstat (limited to 'target/linux/generic/backport-5.4/831-v5.13-0005-firmware-bcm47xx_nvram-inline-code-checking-NVRAM-si.patch')
| -rw-r--r-- | target/linux/generic/backport-5.4/831-v5.13-0005-firmware-bcm47xx_nvram-inline-code-checking-NVRAM-si.patch | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.4/831-v5.13-0005-firmware-bcm47xx_nvram-inline-code-checking-NVRAM-si.patch b/target/linux/generic/backport-5.4/831-v5.13-0005-firmware-bcm47xx_nvram-inline-code-checking-NVRAM-si.patch new file mode 100644 index 0000000000..21d250049e --- /dev/null +++ b/target/linux/generic/backport-5.4/831-v5.13-0005-firmware-bcm47xx_nvram-inline-code-checking-NVRAM-si.patch @@ -0,0 +1,70 @@ +From f52da4ccfec9192e17f5c16260dfdd6d3ea76f65 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> +Date: Mon, 8 Mar 2021 10:03:20 +0100 +Subject: [PATCH] firmware: bcm47xx_nvram: inline code checking NVRAM size +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Separated function was not improving code quality much (or at all). +Moreover it expected possible flash end address as argument and it was +returning NVRAM size. + +The new code always operates on offsets which means less logic and less +calculations. + +Signed-off-by: Rafał Miłecki <rafal@milecki.pl> +Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> +--- + drivers/firmware/broadcom/bcm47xx_nvram.c | 25 +++++++---------------- + 1 file changed, 7 insertions(+), 18 deletions(-) + +--- a/drivers/firmware/broadcom/bcm47xx_nvram.c ++++ b/drivers/firmware/broadcom/bcm47xx_nvram.c +@@ -42,18 +42,6 @@ static bool bcm47xx_nvram_is_valid(void + return ((struct nvram_header *)nvram)->magic == NVRAM_MAGIC; + } + +-static u32 find_nvram_size(void __iomem *end) +-{ +- int i; +- +- for (i = 0; i < ARRAY_SIZE(nvram_sizes); i++) { +- if (bcm47xx_nvram_is_valid(end - nvram_sizes[i])) +- return nvram_sizes[i]; +- } +- +- return 0; +-} +- + /** + * bcm47xx_nvram_copy - copy NVRAM to internal buffer + */ +@@ -85,7 +73,7 @@ static int bcm47xx_nvram_find_and_copy(v + { + size_t flash_size; + size_t offset; +- u32 size; ++ int i; + + if (nvram_len) { + pr_warn("nvram already initialized\n"); +@@ -93,12 +81,13 @@ static int bcm47xx_nvram_find_and_copy(v + } + + /* TODO: when nvram is on nand flash check for bad blocks first. */ ++ ++ /* Try every possible flash size and check for NVRAM at its end */ + for (flash_size = FLASH_MIN; flash_size <= res_size; flash_size <<= 1) { +- /* Windowed flash access */ +- size = find_nvram_size(flash_start + flash_size); +- if (size) { +- offset = flash_size - size; +- goto found; ++ for (i = 0; i < ARRAY_SIZE(nvram_sizes); i++) { ++ offset = flash_size - nvram_sizes[i]; ++ if (bcm47xx_nvram_is_valid(flash_start + offset)) ++ goto found; + } + } + |