This is a note to let you know that I've just added the patch titled
net: ethernet: ixp4xx: Set the DMA masks explicitly
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-ethernet-ixp4xx-set-the-dma-masks-explicitly.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 66811d603c29d2f6ab4050816a24996e18be7b23
Author: Linus Walleij <linus.walleij@xxxxxxxxxx>
Date: Sun Apr 18 20:28:53 2021 +0200
net: ethernet: ixp4xx: Set the DMA masks explicitly
[ Upstream commit 8d892d60941b00c86d2029c8a99db24ab4979673 ]
The former fix only papered over the actual problem: the
ethernet core expects the netdev .dev member to have the
proper DMA masks set, or there will be BUG_ON() triggered
in kernel/dma/mapping.c.
Fix this by simply copying dma_mask and dma_mask_coherent
from the parent device.
Fixes: e45d0fad4a5f ("net: ethernet: ixp4xx: Use parent dev for DMA pool")
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/ethernet/xscale/ixp4xx_eth.c b/drivers/net/ethernet/xscale/ixp4xx_eth.c
index 2e5202923510..403358f2c853 100644
--- a/drivers/net/ethernet/xscale/ixp4xx_eth.c
+++ b/drivers/net/ethernet/xscale/ixp4xx_eth.c
@@ -1086,7 +1086,7 @@ static int init_queues(struct port *port)
int i;
if (!ports_open) {
- dma_pool = dma_pool_create(DRV_NAME, port->netdev->dev.parent,
+ dma_pool = dma_pool_create(DRV_NAME, &port->netdev->dev,
POOL_ALLOC_SIZE, 32, 0);
if (!dma_pool)
return -ENOMEM;
@@ -1436,6 +1436,9 @@ static int ixp4xx_eth_probe(struct platform_device *pdev)
ndev->netdev_ops = &ixp4xx_netdev_ops;
ndev->ethtool_ops = &ixp4xx_ethtool_ops;
ndev->tx_queue_len = 100;
+ /* Inherit the DMA masks from the platform device */
+ ndev->dev.dma_mask = dev->dma_mask;
+ ndev->dev.coherent_dma_mask = dev->coherent_dma_mask;
netif_napi_add(ndev, &port->napi, eth_poll, NAPI_WEIGHT);
