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net: ibm/emac: allocate dummy net_device dynamically

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Embedding net_device into structures prohibits the usage of flexible
arrays in the net_device structure. For more details, see the discussion
at [1].

Un-embed the net_device from the private struct by converting it
into a pointer. Then use the leverage the new alloc_netdev_dummy()
helper to allocate and initialize dummy devices.

[1] https://lore.kernel.org/all/20240229225910.79e224cf@kernel.org/

Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Breno Leitao
2024-04-22 05:39:00 -07:00
committed by David S. Miller
parent 1bdab0ee63
commit 2eb5e25d84
2 changed files with 12 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/net/ethernet/ibm/emac/mal.c
+11 -3
View File
@@ -605,9 +605,13 @@ static int mal_probe(struct platform_device *ofdev)
INIT_LIST_HEAD(&mal->list);
spin_lock_init(&mal->lock);
init_dummy_netdev(&mal->dummy_dev);
mal->dummy_dev = alloc_netdev_dummy(0);
if (!mal->dummy_dev) {
err = -ENOMEM;
goto fail_unmap;
}
netif_napi_add_weight(&mal->dummy_dev, &mal->napi, mal_poll,
netif_napi_add_weight(mal->dummy_dev, &mal->napi, mal_poll,
CONFIG_IBM_EMAC_POLL_WEIGHT);
/* Load power-on reset defaults */
@@ -637,7 +641,7 @@ static int mal_probe(struct platform_device *ofdev)
GFP_KERNEL);
if (mal->bd_virt == NULL) {
err = -ENOMEM;
goto fail_unmap;
goto fail_dummy;
}
for (i = 0; i < mal->num_tx_chans; ++i)
@@ -703,6 +707,8 @@ static int mal_probe(struct platform_device *ofdev)
free_irq(mal->serr_irq, mal);
fail2:
dma_free_coherent(&ofdev->dev, bd_size, mal->bd_virt, mal->bd_dma);
fail_dummy:
free_netdev(mal->dummy_dev);
fail_unmap:
dcr_unmap(mal->dcr_host, 0x100);
fail:
@@ -734,6 +740,8 @@ static void mal_remove(struct platform_device *ofdev)
mal_reset(mal);
free_netdev(mal->dummy_dev);
dma_free_coherent(&ofdev->dev,
sizeof(struct mal_descriptor) *
(NUM_TX_BUFF * mal->num_tx_chans +
drivers/net/ethernet/ibm/emac/mal.h
+1 -1
View File
@@ -205,7 +205,7 @@ struct mal_instance {
int index;
spinlock_t lock;
struct net_device dummy_dev;
struct net_device *dummy_dev;
unsigned int features;
};