brcm80211: fmac: resolve smatch issues in brcmfmac code

This patch resolves the following smatch issues:

wl_cfg80211.c +1377 brcmf_cfg80211_connect(65) warn: min_t truncates
here '(sme->ssid_len)' (4294967295 vs 9223372036854775807)
dhd_sdio.c +1275 brcmf_sdbrcm_rxglom(156) warn: min_t truncates here
'(pfirst->len)' (2147483647 vs 4294967295)
dhd_sdio.c +1457 brcmf_sdbrcm_rxglom(338) warn: min_t truncates here
'(pfirst->len)' (2147483647 vs 4294967295)
bcmsdh_sdmmc.c +300 brcmf_sdioh_request_buffer(10) warn: variable
dereferenced before check 'pkt' (see line 295)

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 3 insertions, 2 deletions

diff --git a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh_sdmmc.c b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh_sdmmc.c
index ac71adeece51..b698a76f8550 100644
--- a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh_sdmmc.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh_sdmmc.c
@@ -294,13 +294,14 @@ int brcmf_sdioh_request_buffer(struct brcmf_sdio_dev *sdiodev,
                                struct sk_buff *pkt)
 {
         int status;
-        uint pkt_len = pkt->len;
+        uint pkt_len;
         bool fifo = (fix_inc == SDIOH_DATA_FIX);
 
         brcmf_dbg(TRACE, "Enter\n");
 
         if (pkt == NULL)
                 return -EINVAL;
+        pkt_len = pkt->len;
 
         brcmf_pm_resume_wait(sdiodev, &sdiodev->request_buffer_wait);
         if (brcmf_pm_resume_error(sdiodev))
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c b/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c
index 74c95a597950..e95a883c77da 100644
--- a/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c
@@ -1376,7 +1376,7 @@ brcmf_cfg80211_connect(struct wiphy *wiphy, struct net_device *ndev,
         memset(&join_params, 0, sizeof(join_params));
         join_params_size = sizeof(join_params.ssid_le);
 
-        ssid.SSID_len = min_t(u32, sizeof(ssid.SSID), sme->ssid_len);
+        ssid.SSID_len = min_t(u32, sizeof(ssid.SSID), (u32)sme->ssid_len);
         memcpy(&join_params.ssid_le.SSID, sme->ssid, ssid.SSID_len);
         memcpy(&ssid.SSID, sme->ssid, ssid.SSID_len);
         join_params.ssid_le.SSID_len = cpu_to_le32(ssid.SSID_len);