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authorMarek Vasut <marex@denx.de>2012-08-26 10:19:20 +0000
committerJoe Hershberger <joe.hershberger@ni.com>2012-09-27 12:22:09 -0500
commite2a66e609745470b1157fe6b6663c804ee44b0b9 (patch)
tree8a7d4cc92516382cbe1af6efc4821fb3c3d6c61a /drivers/net
parentf91ba0ecbc8232691856d2d7524fd53067ca91c9 (diff)
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FEC: Do not pass unaligned buffer to network stack
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>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/fec_mxc.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/fec_mxc.c b/drivers/net/fec_mxc.c
index fbfc842..7b6a997 100644
--- a/drivers/net/fec_mxc.c
+++ b/drivers/net/fec_mxc.c
@@ -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