uio_pdrv_genirq: get irq through platform resource if not set otherwise

Platform devices are configured through platform resources. The interrupt
in the driver uio_pdrv_genirq is instead configured through a side channel
i.e. the platform data structure. Make it possible to use the generic
configuration scheme via platform resource.

Signed-off-by: Benedikt Spranger <b.spranger@linutronix.de>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: "Hans J. Koch" <hjk@hansjkoch.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/uio/uio_pdrv_genirq.c b/drivers/uio/uio_pdrv_genirq.c
index b98371d93a92..42202cd83158 100644
--- a/drivers/uio/uio_pdrv_genirq.c
+++ b/drivers/uio/uio_pdrv_genirq.c
@@ -146,6 +146,14 @@ static int uio_pdrv_genirq_probe(struct platform_device *pdev)
         priv->flags = 0; /* interrupt is enabled to begin with */
         priv->pdev = pdev;
 
+        if (!uioinfo->irq) {
+                ret = platform_get_irq(pdev, 0);
+                if (ret < 0) {
+                        dev_err(&pdev->dev, "failed to get IRQ\n");
+                        goto bad0;
+                }
+                uioinfo->irq = ret;
+        }
         uiomem = &uioinfo->mem[0];
 
         for (i = 0; i < pdev->num_resources; ++i) {