tree d17c162ea4558bd84811bc1dd8fd220b716b12a1
parent d93f4bce1ceaf1b07d378bbfa5406d1d69e3338a
author Aaro Koskinen <aaro.koskinen@nokia.com> 1553718935 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1576921354 +0100

net: stmmac: use correct DMA buffer size in the RX descriptor

commit 583e6361414903c5206258a30e5bd88cb03c0254 upstream.

We always program the maximum DMA buffer size into the receive descriptor,
although the allocated size may be less. E.g. with the default MTU size
we allocate only 1536 bytes. If somebody sends us a bigger frame, then
memory may get corrupted.

Fix by using exact buffer sizes.

Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
[acj: backport to v4.9 -stable :
- adjust context
- skipped the section modifying non-existent functions in dwxgmac2_descs.c and
hwif.h ]
Signed-off-by: Aviraj CJ <acj@cisco.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>