From: Alan Stern <stern@rowland.harvard.edu>
Date: Fri, 14 Apr 2006 20:44:11 +0000 (-0400)
Subject: [PATCH] USB: net2280: check for shared IRQs
X-Git-Tag: v2.6.17-rc4~137^2~5
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=658ad5e001a17be5fadaa8d57d1aa7f7c62628c1;p=linux-2.6

[PATCH] USB: net2280: check for shared IRQs

This patch (as670) adds a check for whether a shared IRQ was actually
generated by the net2280 device.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/usb/gadget/net2280.c b/drivers/usb/gadget/net2280.c
index c842b194cf..b2d507f16b 100644
--- a/drivers/usb/gadget/net2280.c
+++ b/drivers/usb/gadget/net2280.c
@@ -2742,6 +2742,10 @@ static irqreturn_t net2280_irq (int irq, void *_dev, struct pt_regs * r)
 {
 	struct net2280		*dev = _dev;
 
+	/* shared interrupt, not ours */
+	if (!(readl(&dev->regs->irqstat0) & (1 << INTA_ASSERTED)))
+		return IRQ_NONE;
+
 	spin_lock (&dev->lock);
 
 	/* handle disconnect, dma, and more */