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wifi: ath11k: 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 struct ath11k_ext_irq_grp by converting it
into a pointer. Then use the leverage alloc_netdev() to allocate the
net_device object at ath11k_ahb_config_ext_irq() for ahb, and
ath11k_pcic_ext_irq_config() for pcic.

The free of the device occurs at ath11k_ahb_free_ext_irq() for the ahb
case, and ath11k_pcic_free_ext_irq() for the pcic case.

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

Signed-off-by: Breno Leitao <leitao@debian.org>
Tested-by: Kalle Valo <kvalo@kernel.org>
Acked-by: Kalle Valo <kvalo@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Breno Leitao 2024-04-22 05:39:03 -07:00 • committed by David S. Miller
parent 57738dab12
commit bca592ead8
3 changed files with 25 additions and 7 deletions
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9
drivers/net/wireless/ath/ath11k/ahb.c
View file

@ -442,6 +442,7 @@ static void ath11k_ahb_free_ext_irq(struct ath11k_base *ab)
free_irq(ab->irq_num[irq_grp->irqs[j]], irq_grp);
netif_napi_del(&irq_grp->napi);
free_netdev(irq_grp->napi_ndev);
}
}
@ -533,8 +534,12 @@ static int ath11k_ahb_config_ext_irq(struct ath11k_base *ab)
irq_grp->ab = ab;
irq_grp->grp_id = i;
init_dummy_netdev(&irq_grp->napi_ndev);
netif_napi_add(&irq_grp->napi_ndev, &irq_grp->napi,
irq_grp->napi_ndev = alloc_netdev_dummy(0);
if (!irq_grp->napi_ndev)
return -ENOMEM;
netif_napi_add(irq_grp->napi_ndev, &irq_grp->napi,
ath11k_ahb_ext_grp_napi_poll);
for (j = 0; j < ATH11K_EXT_IRQ_NUM_MAX; j++) {

2
drivers/net/wireless/ath/ath11k/core.h
View file

@ -174,7 +174,7 @@ struct ath11k_ext_irq_grp {
u64 timestamp;
bool napi_enabled;
struct napi_struct napi;
struct net_device napi_ndev;
struct net_device *napi_ndev;
};
enum ath11k_smbios_cc_type {

21
drivers/net/wireless/ath/ath11k/pcic.c
View file

@ -316,6 +316,7 @@ static void ath11k_pcic_free_ext_irq(struct ath11k_base *ab)
free_irq(ab->irq_num[irq_grp->irqs[j]], irq_grp);
netif_napi_del(&irq_grp->napi);
free_netdev(irq_grp->napi_ndev);
}
}
@ -558,7 +559,7 @@ ath11k_pcic_get_msi_irq(struct ath11k_base *ab, unsigned int vector)
static int ath11k_pcic_ext_irq_config(struct ath11k_base *ab)
{
int i, j, ret, num_vectors = 0;
int i, j, n, ret, num_vectors = 0;
u32 user_base_data = 0, base_vector = 0;
unsigned long irq_flags;
@ -578,8 +579,11 @@ static int ath11k_pcic_ext_irq_config(struct ath11k_base *ab)
irq_grp->ab = ab;
irq_grp->grp_id = i;
init_dummy_netdev(&irq_grp->napi_ndev);
netif_napi_add(&irq_grp->napi_ndev, &irq_grp->napi,
irq_grp->napi_ndev = alloc_netdev_dummy(0);
if (!irq_grp->napi_ndev)
return -ENOMEM;
netif_napi_add(irq_grp->napi_ndev, &irq_grp->napi,
ath11k_pcic_ext_grp_napi_poll);
if (ab->hw_params.ring_mask->tx[i] ||
@ -601,8 +605,13 @@ static int ath11k_pcic_ext_irq_config(struct ath11k_base *ab)
int vector = (i % num_vectors) + base_vector;
int irq = ath11k_pcic_get_msi_irq(ab, vector);
if (irq < 0)
if (irq < 0) {
for (n = 0; n <= i; n++) {
irq_grp = &ab->ext_irq_grp[n];
free_netdev(irq_grp->napi_ndev);
}
return irq;
}
ab->irq_num[irq_idx] = irq;
@ -615,6 +624,10 @@ static int ath11k_pcic_ext_irq_config(struct ath11k_base *ab)
if (ret) {
ath11k_err(ab, "failed request irq %d: %d\n",
vector, ret);
for (n = 0; n <= i; n++) {
irq_grp = &ab->ext_irq_grp[n];
free_netdev(irq_grp->napi_ndev);
}
return ret;
}
}