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mwl8k: do not free unrequested irq 

When the mwl8k driver attempts and fails to switch from sta to ap
firmware (or vice-versa) in the mwl8k_add_interface routine, the
mwl8k_stop routine will be called. This routine must not attempt
to free the irq if it was not requested.

Signed-off-by: Brian Cavagnolo <brian@cozybit.com>
Signed-off-by: Nishant Sarmukadam <nishants@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Brian Cavagnolo 2011-04-06 14:18:46 +05:30 committed by John W. Linville
parent 2845fd858c
commit bf3ca7f752
1 changed files with 8 additions and 1 deletions
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9
drivers/net/wireless/mwl8k.c
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@ -137,6 +137,7 @@ struct mwl8k_tx_queue {
struct mwl8k_priv {
struct ieee80211_hw *hw;
struct pci_dev *pdev;
int irq;
struct mwl8k_device_info *device_info;
@ -3761,9 +3762,11 @@ static int mwl8k_start(struct ieee80211_hw *hw)
rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
IRQF_SHARED, MWL8K_NAME, hw);
if (rc) {
priv->irq = -1;
wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
return -EIO;
}
priv->irq = priv->pdev->irq;
/* Enable TX reclaim and RX tasklets. */
tasklet_enable(&priv->poll_tx_task);
@ -3800,6 +3803,7 @@ static int mwl8k_start(struct ieee80211_hw *hw)
if (rc) {
iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
free_irq(priv->pdev->irq, hw);
priv->irq = -1;
tasklet_disable(&priv->poll_tx_task);
tasklet_disable(&priv->poll_rx_task);
}
@ -3818,7 +3822,10 @@ static void mwl8k_stop(struct ieee80211_hw *hw)
/* Disable interrupts */
iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
free_irq(priv->pdev->irq, hw);
if (priv->irq != -1) {
free_irq(priv->pdev->irq, hw);
priv->irq = -1;
}
/* Stop finalize join worker */
cancel_work_sync(&priv->finalize_join_worker);