From: Hector Martin <marcan@xxxxxxxxx>
Teach brcm_alt_fw_paths to correctly split off variable length
extensions, and enable alt firmware lookups for the CLM blob firmware
requests.
Apple platforms have per-board CLM blob files.
Acked-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Reviewed-by: Arend van Spriel <arend.vanspriel@xxxxxxxxxxxx>
Signed-off-by: Hector Martin <marcan@xxxxxxxxx>
Reviewed-by: Alvin Šipraga <alsi@xxxxxxxxxxxxxxx>
Signed-off-by: Russell King (Oracle) <rmk+kernel@xxxxxxxxxxxxxxx>
---
.../broadcom/brcm80211/brcmfmac/firmware.c | 33 +++++++++++--------
1 file changed, 20 insertions(+), 13 deletions(-)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
index 15e99d8865bd..6c7c0c8f94ce 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
@@ -587,22 +587,29 @@ static int brcmf_fw_complete_request(const struct firmware *fw,
static char *brcm_alt_fw_path(const char *path, const char *board_type)
{
- char alt_path[BRCMF_FW_NAME_LEN];
- char suffix[5];
+ char base[BRCMF_FW_NAME_LEN];
+ const char *suffix;
+ char *ret;
- strscpy(alt_path, path, BRCMF_FW_NAME_LEN);
- /* At least one character + suffix */
- if (strlen(alt_path) < 5)
+ if (!board_type)
return NULL;
- /* strip .txt or .bin at the end */
- strscpy(suffix, alt_path + strlen(alt_path) - 4, 5);
- alt_path[strlen(alt_path) - 4] = 0;
- strlcat(alt_path, ".", BRCMF_FW_NAME_LEN);
- strlcat(alt_path, board_type, BRCMF_FW_NAME_LEN);
- strlcat(alt_path, suffix, BRCMF_FW_NAME_LEN);
+ suffix = strrchr(path, '.');
+ if (!suffix || suffix == path)
+ return NULL;
+
+ /* strip extension at the end */
+ strscpy(base, path, BRCMF_FW_NAME_LEN);
+ base[suffix - path] = 0;
+
+ ret = kasprintf(GFP_KERNEL, "%s.%s%s", base, board_type, suffix);
+ if (!ret)
+ brcmf_err("out of memory allocating firmware path for '%s'\n",
+ path);
+
+ brcmf_dbg(TRACE, "FW alt path: %s\n", ret);
- return kstrdup(alt_path, GFP_KERNEL);
+ return ret;
}
static int brcmf_fw_request_firmware(const struct firmware **fw,
@@ -612,7 +619,7 @@ static int brcmf_fw_request_firmware(const struct firmware **fw,
int ret;
/* Files can be board-specific, first try a board-specific path */
- if (cur->type == BRCMF_FW_TYPE_NVRAM && fwctx->req->board_type) {
+ if (fwctx->req->board_type) {
char *alt_path;
alt_path = brcm_alt_fw_path(cur->path, fwctx->req->board_type);
--
2.30.2
