From: Wedson Almeida Filho <wedsonaf@gmail.com>
Date: Mon, 24 Jun 2013 06:33:48 +0000 (-0700)
Subject: net: Unmap fragment page once iterator is done
X-Git-Tag: v3.11-rc1~64^2~165
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=aeb193ea6cef28e33589de05ef932424f8e19bde;p=pandora-kernel.git

net: Unmap fragment page once iterator is done

Callers of skb_seq_read() are currently forced to call skb_abort_seq_read()
even when consuming all the data because the last call to skb_seq_read (the
one that returns 0 to indicate the end) fails to unmap the last fragment page.

With this patch callers will be allowed to traverse the SKB data by calling
skb_prepare_seq_read() once and repeatedly calling skb_seq_read() as originally
intended (and documented in the original commit 677e90eda), that is, only call
skb_abort_seq_read() if the sequential read is actually aborted.

Signed-off-by: Wedson Almeida Filho <wedsonaf@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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