From: Oliver Neukum Date: Thu, 15 Nov 2007 01:31:10 +0000 (+0800) Subject: iwl4965: fix not correctly dealing with hotunplug X-Git-Tag: v2.6.24-rc3~5^2~6^2 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=66fbb541a5d2d58fdae21c1e7b558a75bfbd483f;p=linux-2.6 iwl4965: fix not correctly dealing with hotunplug The interrupt handler returns IRQ_NONE if it detects that the device is gone. That's incorrect because the device may have raised the interrupt. Not acknowledging it may trigger the spurious interrupt detection and kill drivers sharing the interrupt line. Signed-off-by: Oliver Neukum Signed-off-by: Zhu Yi Signed-off-by: John W. Linville --- diff --git a/drivers/net/wireless/iwlwifi/iwl4965-base.c b/drivers/net/wireless/iwlwifi/iwl4965-base.c index d60adcb9bd..d5107bb413 100644 --- a/drivers/net/wireless/iwlwifi/iwl4965-base.c +++ b/drivers/net/wireless/iwlwifi/iwl4965-base.c @@ -5156,9 +5156,10 @@ static irqreturn_t iwl_isr(int irq, void *data) } if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) { - /* Hardware disappeared */ + /* Hardware disappeared. It might have already raised + * an interrupt */ IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta); - goto none; + goto unplugged; } IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", @@ -5166,8 +5167,9 @@ static irqreturn_t iwl_isr(int irq, void *data) /* iwl_irq_tasklet() will service interrupts and re-enable them */ tasklet_schedule(&priv->irq_tasklet); - spin_unlock(&priv->lock); + unplugged: + spin_unlock(&priv->lock); return IRQ_HANDLED; none: