AuxXxilium/linux_dsm_epyc7002
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net: ethernet: ixp4xx: Set the DMA masks explicitly

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[ 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: e45d0fad4a ("net: ethernet: ixp4xx: Use parent dev for DMA pool")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Linus Walleij 2021-04-18 20:28:53 +02:00 committed by Greg Kroah-Hartman
parent 78d8b34751
commit 257f38e78a
1 changed files with 4 additions and 1 deletions
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5
drivers/net/ethernet/xscale/ixp4xx_eth.c
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@ -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);