netdev - [PATCH]iwlwifi not correctly dealing with hotunplug

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Message-Id: <200711131926.53732.oneukum@suse.de>
Date:	Tue, 13 Nov 2007 19:26:53 +0100
From:	Oliver Neukum <oneukum@...e.de>
To:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	ipw2100-devel@...ts.sourceforge.net,
	Dan Williams <dcbw@...hat.com>, linux-wireless@...r.kernel.org
Subject: [PATCH]iwlwifi not correctly dealing with hotunplug

It makes no sense to enable interrupts if a device has been unplugged.
In addition if in doubt IRQ_HANDLED should be returned.

Signed-off-by: Oliver Neukum <oneukum@...e.de>

	Regards
		Oliver

----

--- linux-2.6.24-rc1/drivers/net/wireless/iwlwifi/iwl3945-base.c.alt	2007-11-13 12:23:07.000000000 +0100
+++ linux-2.6.24-rc1/drivers/net/wireless/iwlwifi/iwl3945-base.c	2007-11-13 12:26:00.000000000 +0100
@@ -4850,7 +4850,7 @@ static irqreturn_t iwl_isr(int irq, void
 	if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
 		/* Hardware disappeared */
 		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",
@@ -4858,6 +4858,7 @@ static irqreturn_t iwl_isr(int irq, void
 
 	/* iwl_irq_tasklet() will service interrupts and re-enable them */
 	tasklet_schedule(&priv->irq_tasklet);
+unplugged:
 	spin_unlock(&priv->lock);
 
 	return IRQ_HANDLED;
-
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