linux-kernel - [PATCH] brcmfmac: Fix fallback logic to use firmware's canonical path

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Date:   Thu, 12 Aug 2021 10:03:00 -0700
From:   trix@...hat.com
To:     aspriel@...il.com, franky.lin@...adcom.com,
        hante.meuleman@...adcom.com, chi-hsien.lin@...ineon.com,
        wright.feng@...ineon.com, chung-hsien.hsu@...ineon.com,
        kvalo@...eaurora.org, davem@...emloft.net, kuba@...nel.org,
        zhengyongjun3@...wei.com, linus.walleij@...aro.org,
        lee.jones@...aro.org
Cc:     linux-wireless@...r.kernel.org,
        brcm80211-dev-list.pdl@...adcom.com,
        SHA-cyfmac-dev-list@...ineon.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Tom Rix <trix@...hat.com>
Subject: [PATCH] brcmfmac: Fix fallback logic to use firmware's canonical path

From: Tom Rix <trix@...hat.com>

Static analysis reports this problem
firmware.c:709:6: warning: Branch condition evaluates to a garbage value
        if (ret) {
            ^~~

In brcmf_fw_get_firmwares(), ret is only set if the alt_path control
flow is taken.  Initialize ret to -1, so the canonical path is taken
if alt_path is not.

Fixes: 5ff013914c62 ("brcmfmac: firmware: Allow per-board firmware binaries")
Signed-off-by: Tom Rix <trix@...hat.com>
---
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
index adfdfc654b104..e11f1a3a38a59 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
@@ -680,7 +680,7 @@ int brcmf_fw_get_firmwares(struct device *dev, struct brcmf_fw_request *req,
 	struct brcmf_fw_item *first = &req->items[0];
 	struct brcmf_fw *fwctx;
 	char *alt_path;
-	int ret;
+	int ret = -1;
 
 	brcmf_dbg(TRACE, "enter: dev=%s\n", dev_name(dev));
 	if (!fw_cb)
-- 
2.26.3