[PATCH -next] tty: moxa: add missing pci_disable_device()

[ruanjinjie]

Driver should call pci_disable_device() if it returns from
moxa_pci_probe() with error.

Meanwhile, the driver calls pci_enable_device() in
moxa_pci_probe(), but never calls pci_disable_device() during removal.

Signed-off-by: ruanjinjie <ruanjinjie@xxxxxxxxxx>
---
 drivers/tty/moxa.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c
index 35b6fddf0341..9174b64ea2db 100644
--- a/drivers/tty/moxa.c
+++ b/drivers/tty/moxa.c
@@ -1239,7 +1239,7 @@ static int moxa_pci_probe(struct pci_dev *pdev,
 	retval = pci_enable_device(pdev);
 	if (retval) {
 		dev_err(&pdev->dev, "can't enable pci device\n");
-		goto err;
+		return retval;
 	}
 
 	for (i = 0; i < MAX_BOARDS; i++)
@@ -1300,6 +1300,7 @@ static int moxa_pci_probe(struct pci_dev *pdev,
 err_reg:
 	pci_release_region(pdev, 2);
 err:
+	pci_disable_device(pdev);
 	return retval;
 }
 
@@ -1310,6 +1311,7 @@ static void moxa_pci_remove(struct pci_dev *pdev)
 	moxa_board_deinit(brd);
 
 	pci_release_region(pdev, 2);
+	pci_disable_device(pdev);
 }
 
 static struct pci_driver moxa_pci_driver = {
-- 
2.25.1