net: mvpp2: allocate zeroed tx descriptors

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[ Upstream commit a154f8e399 ]

Reserved and unused fields in the Tx descriptors should be 0. The PPv2
driver doesn't clear them at run-time (for performance reasons) but
these descriptors aren't zeroed when allocated, which can lead to
unpredictable behaviors. This patch fixes this by using
dma_zalloc_coherent instead of dma_alloc_coherent.

Fixes: 3f518509de ("ethernet: Add new driver for Marvell Armada 375 network unit")
Signed-off-by: Yan Markman <ymarkman@marvell.com>
[Antoine: commit message]
Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Yan Markman 2017-11-30 10:49:46 +01:00 • committed by Greg Kroah-Hartman

parent 801f3b0c40

commit d4ec37fab6

1 changed files with 1 additions and 1 deletions

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drivers/net/ethernet/marvell/mvpp2.c

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