[PATCH][V2] brcmfmac: fix leak of mypkt on error return path

[Colin King]

From: Colin Ian King <colin.king@xxxxxxxxxxxxx>

Currently if the call to brcmf_sdiod_set_backplane_window fails then
then error return path leaks mypkt. Fix this by returning by a new
error path labelled 'out' that calls brcmu_pkt_buf_free_skb to free
mypkt.  Also remove redundant check on err before calling
brcmf_sdiod_skbuff_write.

Addresses-Coverity: ("Resource Leak")
Fixes: a7c3aa1509e2 ("brcmfmac: Remove brcmf_sdiod_addrprep()")
Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
---

V2: Remove  redundant check on err before calling
brcmf_sdiod_skbuff_write, kudos to Dan Carpenter and Arend Van Spriel
for spotting this.

---
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
index ec129864cc9c..60aede5abb4d 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
@@ -628,15 +628,13 @@ int brcmf_sdiod_send_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes)
 
 	err = brcmf_sdiod_set_backplane_window(sdiodev, addr);
 	if (err)
-		return err;
+		goto out;
 
 	addr &= SBSDIO_SB_OFT_ADDR_MASK;
 	addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
 
-	if (!err)
-		err = brcmf_sdiod_skbuff_write(sdiodev, sdiodev->func2, addr,
-					       mypkt);
-
+	err = brcmf_sdiod_skbuff_write(sdiodev, sdiodev->func2, addr, mypkt);
+out:
 	brcmu_pkt_buf_free_skb(mypkt);
 
 	return err;
-- 
2.20.1