[U-Boot] [PATCH] zynq-gem: Flush cache before handing RX packet to receive handler

[Stefan Theil]

The cache was only flushed before *transmitting* packets, but not
when receiving them, leading to an issue where new packets were
handed to the receive handler with old contents in cache. This
only happens when a lot of packets are received without sending
packages every now and then.

Signed-off-by: Stefan Theil <stefan.theil at mixed-mode.de>
---
 drivers/net/zynq_gem.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/zynq_gem.c b/drivers/net/zynq_gem.c
index 9bd79b198a..5825b6dd99 100644
--- a/drivers/net/zynq_gem.c
+++ b/drivers/net/zynq_gem.c
@@ -621,6 +621,9 @@ static int zynq_gem_recv(struct udevice *dev, int flags, uchar **packetp)
 
 	*packetp = (uchar *)(uintptr_t)addr;
 
+	flush_dcache_range(addr, addr + roundup(PKTSIZE_ALIGN, ARCH_DMA_MINALIGN));
+	barrier();
+
 	return frame_len;
 }
 
-- 
2.17.1