net: macb: Flush correct cache portion when sending

The end address of the cache flush must be cache-line-aligned since
otherwise (at least on ARM926-EJS) the request is ignored. When the cache
is enabled this means that packets are not sent.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Andreas Bießmann <andreas@biessmann.org>

diff --git a/drivers/net/macb.c b/drivers/net/macb.c
index 8be62af..84bae37 100644 (file)
--- a/drivers/net/macb.c
+++ b/drivers/net/macb.c
@@ -280,7 +280,7 @@ static int _macb_send(struct macb_device *macb, const char *name, void *packet,
        barrier();
        macb_flush_ring_desc(macb, TX);
        /* Do we need check paddr and length is dcache line aligned? */
-       flush_dcache_range(paddr, paddr + length);
+       flush_dcache_range(paddr, paddr + ALIGN(length, ARCH_DMA_MINALIGN));
        macb_writel(macb, NCR, MACB_BIT(TE) | MACB_BIT(RE) | MACB_BIT(TSTART));
 
        /*