diff options
Diffstat (limited to 'package/kernel/mac80211/patches/376-brcmfmac-simplify-check-finding-NVRAM-v1-device-path.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/376-brcmfmac-simplify-check-finding-NVRAM-v1-device-path.patch | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/376-brcmfmac-simplify-check-finding-NVRAM-v1-device-path.patch b/package/kernel/mac80211/patches/376-brcmfmac-simplify-check-finding-NVRAM-v1-device-path.patch new file mode 100644 index 0000000000..0e65114f86 --- /dev/null +++ b/package/kernel/mac80211/patches/376-brcmfmac-simplify-check-finding-NVRAM-v1-device-path.patch @@ -0,0 +1,57 @@ +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com> +Date: Wed, 20 May 2015 11:01:08 +0200 +Subject: [PATCH] brcmfmac: simplify check finding NVRAM v1 device path +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +With a simple use of snprintf and small buffer we can compare NVRAM +entry value with a full string. This way we avoid checking random chars +at magic offsets. +Tested on BCM43602 with NVRAM hacked to use v1 format. + +Signed-off-by: Rafał Miłecki <zajec5@gmail.com> +Signed-off-by: Kalle Valo <kvalo@codeaurora.org> +--- + +--- a/drivers/net/wireless/brcm80211/brcmfmac/firmware.c ++++ b/drivers/net/wireless/brcm80211/brcmfmac/firmware.c +@@ -222,6 +222,10 @@ static int brcmf_init_nvram_parser(struc + static void brcmf_fw_strip_multi_v1(struct nvram_parser *nvp, u16 domain_nr, + u16 bus_nr) + { ++ /* Device path with a leading '=' key-value separator */ ++ char pcie_path[] = "=pcie/?/?"; ++ size_t pcie_len; ++ + u32 i, j; + bool found; + u8 *nvram; +@@ -238,6 +242,9 @@ static void brcmf_fw_strip_multi_v1(stru + /* First search for the devpathX and see if it is the configuration + * for domain_nr/bus_nr. Search complete nvp + */ ++ snprintf(pcie_path, sizeof(pcie_path), "=pcie/%d/%d", domain_nr, ++ bus_nr); ++ pcie_len = strlen(pcie_path); + found = false; + i = 0; + while (i < nvp->nvram_len - BRCMF_FW_NVRAM_DEVPATH_LEN) { +@@ -245,13 +252,10 @@ static void brcmf_fw_strip_multi_v1(stru + * Y = domain_nr, Z = bus_nr, X = virtual ID + */ + if ((strncmp(&nvp->nvram[i], "devpath", 7) == 0) && +- (strncmp(&nvp->nvram[i + 8], "=pcie/", 6) == 0)) { +- if (((nvp->nvram[i + 14] - '0') == domain_nr) && +- ((nvp->nvram[i + 16] - '0') == bus_nr)) { +- id = nvp->nvram[i + 7] - '0'; +- found = true; +- break; +- } ++ (strncmp(&nvp->nvram[i + 8], pcie_path, pcie_len) == 0)) { ++ id = nvp->nvram[i + 7] - '0'; ++ found = true; ++ break; + } + while (nvp->nvram[i] != 0) + i++; |