xen-netback: Fix releasing header slot on error path

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This patch makes this function aware that the first frag and the header might
share the same ring slot. That could happen if the first slot is bigger than
PKT_PROT_LEN. Due to this the error path might release that slot twice or never,
depending on the error scenario.
xenvif_idx_release is also removed from xenvif_idx_unmap, and called separately.

Signed-off-by: Zoltan Kiss <zoltan.kiss@citrix.com>
Reported-by: Armin Zentai <armin.zentai@ezit.hu>
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: xen-devel@lists.xenproject.org
Signed-off-by: David S. Miller <davem@davemloft.net>

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Zoltan Kiss 2014-07-18 19:08:04 +01:00 • committed by David S. Miller

parent b42cc6e421

commit 1b860da040

1 changed files with 33 additions and 5 deletions

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38

drivers/net/xen-netback/netback.c

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