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[U-Boot,v2,28/45] net: mvpp2.c: Clear all buffer / descriptor areas before usage

Message ID 20170323160211.18072-29-sr@denx.de
State Awaiting Upstream
Delegated to: Stefan Roese
Headers show

Commit Message

Stefan Roese March 23, 2017, 4:01 p.m. UTC 
This fixes problems noticed with the PPv2.2 A7k/8k port, when not all
elements of the descriptors had been cleared before use.

Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

---

Changes in v2:
- Added Acked-by from Joe

 drivers/net/mvpp2.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/drivers/net/mvpp2.c b/drivers/net/mvpp2.c
index 06909e6a3c..b9e0fdcc82 100644
--- a/drivers/net/mvpp2.c
+++ b/drivers/net/mvpp2.c
@@ -4429,6 +4429,9 @@  static int mvpp2_base_probe(struct udevice *dev)
 		size += RX_BUFFER_SIZE;
 	}
 
+	/* Clear the complete area so that all descriptors are cleared */
+	memset(bd_space, 0, size);
+
 	/* Save base addresses for later use */
 	priv->base = (void *)dev_get_addr_index(dev, 0);
 	if (IS_ERR(priv->base))