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qtnfmac: lock access to h/w in tx path 

Fix tx path regression. Lock should be held when queuing packets
to h/w fifos in order to properly handle configurations with
multiple enabled interfaces.

Signed-off-by: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Sergey Matyukevich 2017-09-18 15:29:49 +03:00 committed by Kalle Valo
parent 35f62727df
commit 20da2ec06b
2 changed files with 10 additions and 1 deletions
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9
drivers/net/wireless/quantenna/qtnfmac/pearl/pcie.c
View File

@ -661,14 +661,18 @@ static int qtnf_pcie_data_tx(struct qtnf_bus *bus, struct sk_buff *skb)
struct qtnf_pcie_bus_priv *priv = (void *)get_bus_priv(bus);
dma_addr_t txbd_paddr, skb_paddr;
struct qtnf_tx_bd *txbd;
unsigned long flags;
int len, i;
u32 info;
int ret = 0;
spin_lock_irqsave(&priv->tx0_lock, flags);
if (!qtnf_tx_queue_ready(priv)) {
if (skb->dev)
netif_stop_queue(skb->dev);
spin_unlock_irqrestore(&priv->tx0_lock, flags);
return NETDEV_TX_BUSY;
}
@ -717,8 +721,10 @@ tx_done:
dev_kfree_skb_any(skb);
}
qtnf_pcie_data_tx_reclaim(priv);
priv->tx_done_count++;
spin_unlock_irqrestore(&priv->tx0_lock, flags);
qtnf_pcie_data_tx_reclaim(priv);
return NETDEV_TX_OK;
}
@ -1247,6 +1253,7 @@ static int qtnf_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
strcpy(bus->fwname, QTN_PCI_PEARL_FW_NAME);
init_completion(&bus->request_firmware_complete);
mutex_init(&bus->bus_lock);
spin_lock_init(&pcie_priv->tx0_lock);
spin_lock_init(&pcie_priv->irq_lock);
spin_lock_init(&pcie_priv->tx_reclaim_lock);

2
drivers/net/wireless/quantenna/qtnfmac/pearl/pcie_bus_priv.h
View File

@ -34,6 +34,8 @@ struct qtnf_pcie_bus_priv {
/* lock for tx reclaim operations */
spinlock_t tx_reclaim_lock;
/* lock for tx0 operations */
spinlock_t tx0_lock;
u8 msi_enabled;
int mps;