[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>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/usb/gadget/net2280.c b/drivers/usb/gadget/net2280.c
index c842b194cf0f..b2d507f16b85 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 */