tree 01de4f3ad8098331f6c94d54c77b82398c92b3ec
parent c7a7c95e8e18a3598c4d0f99c35e69dce591daf1
author Karsten Keil <keil@b1-systems.de> 1445429919 +0200
committer David S. Miller <davem@davemloft.net> 1445523799 -0700

mISDN: fix OOM condition for sending queued I-Frames

The old code did not check the return value of skb_clone().
The extra skb_clone() is not needed at all, if using skb_realloc_headroom()
instead, which gives us a private copy with enough headroom as well.
We need to requeue the original skb if the call failed, because we cannot
inform upper layers about the data loss. Restructure the code to minimise
rollback effort if it happens.
This fix kernel bug #86091

Thanks to Insu Yun <wuninsu@gmail.com> to remind me on this issue.

Signed-off-by: Karsten Keil <keil@b1-systems.de>
Signed-off-by: David S. Miller <davem@davemloft.net>