brcmfmac: Fix glob_skb leak in brcmf_sdiod_recv_chain

commit 3bdae810 upstream.

In case brcmf_sdiod_recv_chain() cannot complete a succeful call to
brcmf_sdiod_buffrw, we would be leaking glom_skb and not free it as we
should, fix this.

Reported-by: coverity (CID 1164856)
Fixes: a413e39a ("brcmfmac: fix brcmf_sdcard_recv_chain() for host without sg support")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
[bwh: Backported to 3.16: adjust filename]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c

@@ -708,8 +708,10 @@ int brcmf_sdiod_recv_chain(struct brcmf_sdio_dev *sdiodev,
 			return -ENOMEM;
 		err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, false, addr,
 					 glom_skb);
-		if (err)
+		if (err) {
+			brcmu_pkt_buf_free_skb(glom_skb);
 			goto done;
+		}
 
 		skb_queue_walk(pktq, skb) {
 			memcpy(skb->data, glom_skb->data, skb->len);