UIO: uio_pdrv_genirq: allow custom irq_flags

I can't think of a reason why the driver prevents people from setting any
custom bits in their platform device, but I can think of some reasons for
allowing custom flags.  Like setting the IRQF_TRIGGER_... bits.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Hans J. Koch <hjk@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/uio/uio_pdrv_genirq.c

@@ -81,7 +81,8 @@ static int uio_pdrv_genirq_probe(struct platform_device *pdev)
 		goto bad0;
 	}
 
-	if (uioinfo->handler || uioinfo->irqcontrol || uioinfo->irq_flags) {
+	if (uioinfo->handler || uioinfo->irqcontrol ||
+	    uioinfo->irq_flags & IRQF_SHARED) {
 		dev_err(&pdev->dev, "interrupt configuration error\n");
 		goto bad0;
 	}
@@ -132,7 +133,7 @@ static int uio_pdrv_genirq_probe(struct platform_device *pdev)
 	 * Interrupt sharing is not supported.
 	 */
 
-	uioinfo->irq_flags = IRQF_DISABLED;
+	uioinfo->irq_flags |= IRQF_DISABLED;
 	uioinfo->handler = uio_pdrv_genirq_handler;
 	uioinfo->irqcontrol = uio_pdrv_genirq_irqcontrol;
 	uioinfo->priv = priv;