From fd37f195cacc068ad4c070dd794643fcb25ef21a Mon Sep 17 00:00:00 2001 From: Fabio Estevam Date: Tue, 17 Sep 2013 23:13:10 -0300 Subject: [PATCH] net: fec_mxc: Fix timeouts during tftp transfer MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Performing tftp transfers on mx28 results in random timeouts. Hector Palacios and Robert Hodaszi analyzed the root cause being related to the wrong alignment of the 'buff' buffer inside fec_recv(). Benoît Thébaudeau provided an excellent analysis of the alignment bug that is present on older versions, such as GCC 4.5.4: http://marc.info/?l=u-boot&m=137942904906131&w=2 Use ALLOC_CACHE_ALIGN_BUFFER() to avoid alignment issues from older GCC versions. Reported-by: Hector Palacios Tested-by: Oliver Metz Tested-by: Hector Palacios Signed-off-by: Fabio Estevam Acked-by: Marek Vasut Tested-by: Marek Vasut --- drivers/net/fec_mxc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/fec_mxc.c b/drivers/net/fec_mxc.c index 210ef02df5..107cd6ecc5 100644 --- a/drivers/net/fec_mxc.c +++ b/drivers/net/fec_mxc.c @@ -794,7 +794,7 @@ static int fec_recv(struct eth_device *dev) uint16_t bd_status; uint32_t addr, size, end; int i; - uchar buff[FEC_MAX_PKT_SIZE] __aligned(ARCH_DMA_MINALIGN); + ALLOC_CACHE_ALIGN_BUFFER(uchar, buff, FEC_MAX_PKT_SIZE); /* * Check if any critical events have happened -- 2.39.2