diff options
| author | Breno Leitao <leitao@debian.org> | 2024-05-08 02:54:09 -0700 |
|---|---|---|
| committer | Kalle Valo <quic_kvalo@quicinc.com> | 2024-05-13 17:19:13 +0300 |
| commit | 4f9206e8c2c15a3770e3eb0b9755a05d559fecea (patch) | |
| tree | 5f090bcdde5424a4e99f77b82985ae597cd13005 | |
| parent | 6d67d18014a8130defbca1972d7f0e0a8f8f259e (diff) | |
wifi: ath12k: allocate dummy net_device dynamically
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 ath12k_ext_irq_grp by converting it
into a pointer. Then use the leverage alloc_netdev_dummy() to allocate
the net_device object at ath12k_pci_ext_irq_config().
The free of the device occurs at ath12k_pci_free_ext_irq().
Link: https://lore.kernel.org/all/20240229225910.79e224cf@kernel.org/ [1]
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://msgid.link/20240508095410.1923198-1-leitao@debian.org
| -rw-r--r-- | drivers/net/wireless/ath/ath12k/core.h | 2 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/ath12k/pci.c | 27 |
2 files changed, 23 insertions, 6 deletions
diff --git a/drivers/net/wireless/ath/ath12k/core.h b/drivers/net/wireless/ath/ath12k/core.h index bb6c1b562baf..c6b7524ce3a0 100644 --- a/drivers/net/wireless/ath/ath12k/core.h +++ b/drivers/net/wireless/ath/ath12k/core.h @@ -146,7 +146,7 @@ struct ath12k_ext_irq_grp { u32 grp_id; u64 timestamp; struct napi_struct napi; - struct net_device napi_ndev; + struct net_device *napi_ndev; }; struct ath12k_smbios_bdf { diff --git a/drivers/net/wireless/ath/ath12k/pci.c b/drivers/net/wireless/ath/ath12k/pci.c index 16af046c33d9..ac75e8e3916b 100644 --- a/drivers/net/wireless/ath/ath12k/pci.c +++ b/drivers/net/wireless/ath/ath12k/pci.c @@ -350,6 +350,7 @@ static void ath12k_pci_free_ext_irq(struct ath12k_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); } } @@ -560,8 +561,9 @@ static irqreturn_t ath12k_pci_ext_interrupt_handler(int irq, void *arg) static int ath12k_pci_ext_irq_config(struct ath12k_base *ab) { struct ath12k_pci *ab_pci = ath12k_pci_priv(ab); - int i, j, ret, num_vectors = 0; + int i, j, n, ret, num_vectors = 0; u32 user_base_data = 0, base_vector = 0, base_idx; + struct ath12k_ext_irq_grp *irq_grp; base_idx = ATH12K_PCI_IRQ_CE0_OFFSET + CE_COUNT_MAX; ret = ath12k_pci_get_user_msi_assignment(ab, "DP", @@ -572,13 +574,18 @@ static int ath12k_pci_ext_irq_config(struct ath12k_base *ab) return ret; for (i = 0; i < ATH12K_EXT_IRQ_GRP_NUM_MAX; i++) { - struct ath12k_ext_irq_grp *irq_grp = &ab->ext_irq_grp[i]; + irq_grp = &ab->ext_irq_grp[i]; u32 num_irq = 0; 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) { + ret = -ENOMEM; + goto fail_allocate; + } + + netif_napi_add(irq_grp->napi_ndev, &irq_grp->napi, ath12k_pci_ext_grp_napi_poll); if (ab->hw_params->ring_mask->tx[i] || @@ -611,13 +618,23 @@ static int ath12k_pci_ext_irq_config(struct ath12k_base *ab) if (ret) { ath12k_err(ab, "failed request irq %d: %d\n", vector, ret); - return ret; + goto fail_request; } } ath12k_pci_ext_grp_disable(irq_grp); } return 0; + +fail_request: + /* i ->napi_ndev was properly allocated. Free it also */ + i += 1; +fail_allocate: + for (n = 0; n < i; n++) { + irq_grp = &ab->ext_irq_grp[n]; + free_netdev(irq_grp->napi_ndev); + } + return ret; } static int ath12k_pci_set_irq_affinity_hint(struct ath12k_pci *ab_pci, |