diff options
Diffstat (limited to 'target/linux/generic/backport-5.4/831-v5.13-0003-firmware-bcm47xx_nvram-extract-code-copying-NVRAM.patch')
| -rw-r--r-- | target/linux/generic/backport-5.4/831-v5.13-0003-firmware-bcm47xx_nvram-extract-code-copying-NVRAM.patch | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.4/831-v5.13-0003-firmware-bcm47xx_nvram-extract-code-copying-NVRAM.patch b/target/linux/generic/backport-5.4/831-v5.13-0003-firmware-bcm47xx_nvram-extract-code-copying-NVRAM.patch new file mode 100644 index 0000000000..a1351f1197 --- /dev/null +++ b/target/linux/generic/backport-5.4/831-v5.13-0003-firmware-bcm47xx_nvram-extract-code-copying-NVRAM.patch @@ -0,0 +1,80 @@ +From 298923cf999cecd2ef06df126f85a3d68da8c4d8 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 10:03:18 +0100 +Subject: [PATCH] firmware: bcm47xx_nvram: extract code copying NVRAM +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +This simplifies function finding NVRAM. It doesn't directly deal with +NVRAM structure anymore and is a bit smaller. + +Signed-off-by: Rafał Miłecki <rafal@milecki.pl> +Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> +--- + drivers/firmware/broadcom/bcm47xx_nvram.c | 43 +++++++++++++---------- + 1 file changed, 25 insertions(+), 18 deletions(-) + +--- a/drivers/firmware/broadcom/bcm47xx_nvram.c ++++ b/drivers/firmware/broadcom/bcm47xx_nvram.c +@@ -55,11 +55,34 @@ static u32 find_nvram_size(void __iomem + } + + /** ++ * bcm47xx_nvram_copy - copy NVRAM to internal buffer ++ */ ++static void bcm47xx_nvram_copy(void __iomem *nvram_start, size_t res_size) ++{ ++ struct nvram_header __iomem *header = nvram_start; ++ size_t copy_size; ++ ++ copy_size = header->len; ++ if (copy_size > res_size) { ++ pr_err("The nvram size according to the header seems to be bigger than the partition on flash\n"); ++ copy_size = res_size; ++ } ++ if (copy_size >= NVRAM_SPACE) { ++ pr_err("nvram on flash (%zu bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n", ++ copy_size, NVRAM_SPACE - 1); ++ copy_size = NVRAM_SPACE - 1; ++ } ++ ++ __ioread32_copy(nvram_buf, nvram_start, DIV_ROUND_UP(copy_size, 4)); ++ nvram_buf[NVRAM_SPACE - 1] = '\0'; ++ nvram_len = copy_size; ++} ++ ++/** + * bcm47xx_nvram_find_and_copy - find NVRAM on flash mapping & copy it + */ + static int bcm47xx_nvram_find_and_copy(void __iomem *flash_start, size_t res_size) + { +- struct nvram_header __iomem *header; + size_t flash_size; + size_t offset; + u32 size; +@@ -95,23 +118,7 @@ static int bcm47xx_nvram_find_and_copy(v + return -ENXIO; + + found: +- header = (struct nvram_header *)(flash_start + offset); +- __ioread32_copy(nvram_buf, header, sizeof(*header) / 4); +- nvram_len = ((struct nvram_header *)(nvram_buf))->len; +- size = res_size - offset; +- if (nvram_len > size) { +- pr_err("The nvram size according to the header seems to be bigger than the partition on flash\n"); +- nvram_len = size; +- } +- if (nvram_len >= NVRAM_SPACE) { +- pr_err("nvram on flash (%zu bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n", +- nvram_len, NVRAM_SPACE - 1); +- nvram_len = NVRAM_SPACE - 1; +- } +- /* proceed reading data after header */ +- __ioread32_copy(nvram_buf + sizeof(*header), header + 1, +- DIV_ROUND_UP(nvram_len, 4)); +- nvram_buf[NVRAM_SPACE - 1] = '\0'; ++ bcm47xx_nvram_copy(flash_start + offset, res_size - offset); + + return 0; + } |