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FEC: Do not pass unaligned buffer to network stack

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Do not pass unaligned RX buffer to the upper layers. The upper layer,
especially in the ARP case, recycles the buffer and passes it back into
the FEC, into it's TX path. With caches enabled, the FEC hangs on this
from time to time.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Benoit Thebaudeau <benoit.thebaudeau@advans>
Cc: Eric Nelson <eric.nelson@boundarydevices.com>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Tested-by: Fabio Estevam <fabio.estevam@freescale.com>
This commit is contained in:
Marek Vasut 2012-08-26 10:19:20 +00:00 committed by Joe Hershberger
parent f91ba0ecbc
commit e2a66e6097
1 changed files with 2 additions and 1 deletions
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3
drivers/net/fec_mxc.c
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@ -31,6 +31,7 @@
#include <asm/arch/imx-regs.h>
#include <asm/io.h>
#include <asm/errno.h>
#include <linux/compiler.h>
DECLARE_GLOBAL_DATA_PTR;
@ -791,7 +792,7 @@ static int fec_recv(struct eth_device *dev)
uint16_t bd_status;
uint32_t addr, size;
int i;
uchar buff[FEC_MAX_PKT_SIZE];
uchar buff[FEC_MAX_PKT_SIZE] __aligned(ARCH_DMA_MINALIGN);
/*
* Check if any critical events have happened