net: mvneta: dcache flush TX descriptors at init

This fixes sporadic timeout on initial packet Tx (usually ARP), with an
error message like:

  timeout: packet not sent

Reviewed-by: Stefan Roese <[email protected]>
Tested-by: Chris Packham <[email protected]>
Acked-by: Joe Hershberger <[email protected]>
Signed-off-by: Rabeeh Khoury <[email protected]>
Signed-off-by: Baruch Siach <[email protected]>

diff --git a/drivers/net/mvneta.c b/drivers/net/mvneta.c
index 45e5eda95522c0f588e4878ee2e46e1fd59be854..254dd04697dbc8668e1dc031c1957f061c92dd75 100644 (file)
--- a/drivers/net/mvneta.c
+++ b/drivers/net/mvneta.c
@@ -1702,6 +1702,7 @@ static int mvneta_probe(struct udevice *dev)
 
                /* Align buffer area for descs and rx_buffers to 1MiB */
                bd_space = memalign(1 << MMU_SECTION_SHIFT, BD_SPACE);
+               flush_dcache_range((ulong)bd_space, (ulong)bd_space + BD_SPACE);
                mmu_set_region_dcache_behaviour((phys_addr_t)bd_space, BD_SPACE,
                                                DCACHE_OFF);
                buffer_loc.tx_descs = (struct mvneta_tx_desc *)bd_space;