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

[Alexey Khoroshilov]

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 <khoroshilov@xxxxxxxxx>
---
 drivers/uio/uio_pci_generic.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/uio/uio_pci_generic.c b/drivers/uio/uio_pci_generic.c
index 077ae12269ce..d0b508b68f3c 100644
--- 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);
 
-- 
1.9.1

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