This patch continues the effort which began with:
"[PATCH] p54pci: move tx cleanup into tasklet".
Thanks to these changes, p54pci's interrupt & tx
cleanup routines can be made lock-less.
Signed-off-by: Christian Lamparter <chunkeey@xxxxxxxxxxxxxx>
---
If no one finds a bug till Friday, this will become a [PATCH].
---
diff --git a/drivers/net/wireless/p54/p54pci.c b/drivers/net/wireless/p54/p54pci.c
index acc78e7..abf104e 100644
--- a/drivers/net/wireless/p54/p54pci.c
+++ b/drivers/net/wireless/p54/p54pci.c
@@ -238,7 +238,6 @@ static void p54p_check_tx_ring(struct ieee80211_hw *dev, u32 *index,
int ring_index, struct p54p_desc *ring, u32 ring_limit,
struct sk_buff **tx_buf)
{
- unsigned long flags;
struct p54p_priv *priv = dev->priv;
struct p54p_ring_control *ring_control = priv->ring_control;
struct p54p_desc *desc;
@@ -249,7 +248,6 @@ static void p54p_check_tx_ring(struct ieee80211_hw *dev, u32 *index,
(*index) = idx = le32_to_cpu(ring_control->device_idx[1]);
idx %= ring_limit;
- spin_lock_irqsave(&priv->lock, flags);
while (i != idx) {
desc = &ring[i];
@@ -264,16 +262,12 @@ static void p54p_check_tx_ring(struct ieee80211_hw *dev, u32 *index,
desc->len = 0;
desc->flags = 0;
- if (skb && FREE_AFTER_TX(skb)) {
- spin_unlock_irqrestore(&priv->lock, flags);
+ if (skb && FREE_AFTER_TX(skb))
p54_free_skb(dev, skb);
- spin_lock_irqsave(&priv->lock, flags);
- }
i++;
i %= ring_limit;
}
- spin_unlock_irqrestore(&priv->lock, flags);
}
static void p54p_tasklet(unsigned long dev_id)
@@ -306,7 +300,6 @@ static irqreturn_t p54p_interrupt(int irq, void *dev_id)
struct p54p_priv *priv = dev->priv;
__le32 reg;
- spin_lock(&priv->lock);
reg = P54P_READ(int_ident);
if (unlikely(reg == cpu_to_le32(0xFFFFFFFF))) {
goto out;
@@ -321,15 +314,14 @@ static irqreturn_t p54p_interrupt(int irq, void *dev_id)
complete(&priv->boot_comp);
out:
- spin_unlock(&priv->lock);
return reg ? IRQ_HANDLED : IRQ_NONE;
}
static void p54p_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
{
+ unsigned long flags;
struct p54p_priv *priv = dev->priv;
struct p54p_ring_control *ring_control = priv->ring_control;
- unsigned long flags;
struct p54p_desc *desc;
dma_addr_t mapping;
u32 device_idx, idx, i;
@@ -370,14 +362,14 @@ static void p54p_stop(struct ieee80211_hw *dev)
unsigned int i;
struct p54p_desc *desc;
- tasklet_kill(&priv->tasklet);
-
P54P_WRITE(int_enable, cpu_to_le32(0));
P54P_READ(int_enable);
udelay(10);
free_irq(priv->pdev->irq, dev);
+ tasklet_kill(&priv->tasklet);
+
P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_RESET));
for (i = 0; i < ARRAY_SIZE(priv->rx_buf_data); i++) {
--
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