uio/uio_pci_generic: don't return zero on failure path in probe()

If uio_register_device() fails in probe(), it breaks off initialization,
deallocates all resources, but returns zero.

The patch adds proper error code propagation.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <[email protected]>
Acked-by: Michael S. Tsirkin <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

diff --git a/drivers/uio/uio_pci_generic.c b/drivers/uio/uio_pci_generic.c
index 077ae12269ce3a99fcc35ee099e6453a102484de..d0b508b68f3c3e4969bf46036510255d01ae7dd9 100644 (file)
--- a/drivers/uio/uio_pci_generic.c
+++ b/drivers/uio/uio_pci_generic.c
@@ -91,7 +91,8 @@ static int probe(struct pci_dev *pdev,
        gdev->info.handler = irqhandler;
        gdev->pdev = pdev;
 
-       if (uio_register_device(&pdev->dev, &gdev->info))
+       err = uio_register_device(&pdev->dev, &gdev->info);
+       if (err)
                goto err_register;
        pci_set_drvdata(pdev, gdev);