Commit commit b08cc79155fc26d0d112b1470d1ece5034651a4b eliminated memory
allocation in the packet send path. This commit introduced a bug since it
did not account for the case if the skb was cloned. Fix this bug by
using the pre-reserved head room only if the skb is not cloned.
Signed-off-by: K. Y. Srinivasan <k...@microsoft.com>
---
drivers/net/hyperv/netvsc_drv.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index a3a9d38..7eb0251 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -421,7 +421,7 @@ check_size:
pkt_sz = sizeof(struct hv_netvsc_packet) + RNDIS_AND_PPI_SIZE;
- if (head_room < pkt_sz) {
+ if (skb->cloned || head_room < pkt_sz) {
packet = kmalloc(pkt_sz, GFP_ATOMIC);
if (!packet) {
/* out of memory, drop packet */
--
1.7.4.1
--
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