This error seems to be really rare, and we do not know real couse of it.
But, in any case, we should check size of head before reducing it.
Signed-off-by: Oleksij Rempel <linux@xxxxxxxxxxxxxxxx>
Reported-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/htc_hst.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/net/wireless/ath/ath9k/htc_hst.c b/drivers/net/wireless/ath/ath9k/htc_hst.c
index aac4a40..2901351 100644
--- a/drivers/net/wireless/ath/ath9k/htc_hst.c
+++ b/drivers/net/wireless/ath/ath9k/htc_hst.c
@@ -26,6 +26,12 @@ static int htc_issue_send(struct htc_target *target, struct sk_buff* skb,
struct htc_endpoint *endpoint = &target->endpoint[epid];
int status;
+ if (skb_headroom(skb) < len &&
+ pskb_expand_head(skb, len, 0, GFP_ATOMIC)) {
+ dev_err(target->dev, "Unable to expand headrom to %d\n", len);
+ return -ENOMEM;
+ }
+
hdr = (struct htc_frame_hdr *)
skb_push(skb, sizeof(struct htc_frame_hdr));
hdr->endpoint_id = epid;
--
1.8.1.2
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