diff options
| author | Rafał Miłecki <zajec5@gmail.com> | 2015-05-20 12:01:08 +0300 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2015-05-28 11:49:44 +0300 |
| commit | 5d08408b6f6b28d9a57ab7b2c7419ca8bfc6b8a4 (patch) | |
| tree | dd3d90f8d708c4b6fa171773ef6083600dab3ee6 /drivers/net/wireless/brcm80211 | |
| parent | ae8c2366d77cd7c6de776bcb1dcb6be88f2a1185 (diff) | |
| download | linux-5d08408b6f6b28d9a57ab7b2c7419ca8bfc6b8a4.tar.xz | |
brcmfmac: simplify check finding NVRAM v1 device path
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>
Diffstat (limited to 'drivers/net/wireless/brcm80211')
| -rw-r--r-- | drivers/net/wireless/brcm80211/brcmfmac/firmware.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/firmware.c b/drivers/net/wireless/brcm80211/brcmfmac/firmware.c index 181a0e848582..a1e1253a06c8 100644 --- 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(struct nvram_parser *nvp, 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(struct nvram_parser *nvp, u16 domain_nr, /* 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(struct nvram_parser *nvp, u16 domain_nr, * 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++; |