From ae8c2366d77cd7c6de776bcb1dcb6be88f2a1185 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Rafa=C5=82=20Mi=C5=82ecki?= Date: Wed, 20 May 2015 09:34:21 +0200 Subject: [PATCH] brcmfmac: simplify check stripping v2 NVRAM MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Comparing NVRAM entry with a full filtering string is simpler than comparing it with a short prefix and then checking random chars at magic offsets. The cost of snprintf relatively low, we execute it just once. Tested on BCM43602 with NVRAM hacked to use V2 format. Signed-off-by: Rafał Miłecki Signed-off-by: Kalle Valo --- .../net/wireless/brcm80211/brcmfmac/firmware.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/drivers/net/wireless/brcm80211/brcmfmac/firmware.c b/drivers/net/wireless/brcm80211/brcmfmac/firmware.c index 8ff31ffa4a41..181a0e848582 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/firmware.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/firmware.c @@ -25,7 +25,7 @@ #define BRCMF_FW_MAX_NVRAM_SIZE 64000 #define BRCMF_FW_NVRAM_DEVPATH_LEN 19 /* devpath0=pcie/1/4/ */ -#define BRCMF_FW_NVRAM_PCIEDEV_LEN 9 /* pcie/1/4/ */ +#define BRCMF_FW_NVRAM_PCIEDEV_LEN 10 /* pcie/1/4/ + \0 */ char brcmf_firmware_path[BRCMF_FW_PATH_LEN]; module_param_string(firmware_path, brcmf_firmware_path, @@ -297,6 +297,8 @@ fail: static void brcmf_fw_strip_multi_v2(struct nvram_parser *nvp, u16 domain_nr, u16 bus_nr) { + char prefix[BRCMF_FW_NVRAM_PCIEDEV_LEN]; + size_t len; u32 i, j; u8 *nvram; @@ -308,14 +310,13 @@ static void brcmf_fw_strip_multi_v2(struct nvram_parser *nvp, u16 domain_nr, * Valid entries are of type pcie/X/Y/ where X = domain_nr and * Y = bus_nr. */ + snprintf(prefix, sizeof(prefix), "pcie/%d/%d/", domain_nr, bus_nr); + len = strlen(prefix); i = 0; j = 0; - while (i < nvp->nvram_len - BRCMF_FW_NVRAM_PCIEDEV_LEN) { - if ((strncmp(&nvp->nvram[i], "pcie/", 5) == 0) && - (nvp->nvram[i + 6] == '/') && (nvp->nvram[i + 8] == '/') && - ((nvp->nvram[i + 5] - '0') == domain_nr) && - ((nvp->nvram[i + 7] - '0') == bus_nr)) { - i += BRCMF_FW_NVRAM_PCIEDEV_LEN; + while (i < nvp->nvram_len - len) { + if (strncmp(&nvp->nvram[i], prefix, len) == 0) { + i += len; while (nvp->nvram[i] != 0) { nvram[j] = nvp->nvram[i]; i++; -- 2.20.1