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@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; }