From: Florian Fainelli <f.fainelli@gmail.com>
Date: Fri, 10 Oct 2014 17:51:52 +0000 (-0700)
Subject: net: bcmgenet: fix off-by-one in incrementing read pointer
X-Git-Tag: fixes-against-v3.18-rc2~115^2^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cf377d886f7944a5ccdbd164b89949e13617b096;p=pandora-kernel.git

net: bcmgenet: fix off-by-one in incrementing read pointer

Commit b629be5c8399d7c423b92135eb43a86c924d1cbc ("net: bcmgenet: check
harder for out of memory conditions") moved the increment of the local
read pointer *before* reading from the hardware descriptor using
dmadesc_get_length_status(), which creates an off-by-one situation.

Fix this by moving again the read_ptr increment after we have read the
hardware descriptor to get both the control block and the read pointer
back in sync.

Fixes: b629be5c8399 ("net: bcmgenet: check harder for out of memory conditions")
Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Petri Gynther <pgynther@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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