[PATCH] mtd: amd76xrom: Fix PCI device reference leak in amd76xrom_init_one()

[Wentao Liang]

init_amd76xrom() obtains the PCI device with pci_get_device() and
hands the reference over to amd76xrom_init_one(), which stores it in
window->pdev.  When reserving the ROM window fails, that function
returns -EBUSY directly instead of going through amd76xrom_cleanup(),
so the reference is neither released nor cleared.

Drop the reference and clear window->pdev on that path.

Fixes: dd8e9ed6ed54 ("[MTD] Switch to pci_get_device and do ref counting")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Wentao Liang <vulab@xxxxxxxxxxx>
---
 drivers/mtd/maps/amd76xrom.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/mtd/maps/amd76xrom.c b/drivers/mtd/maps/amd76xrom.c
index 95f9b99ce5fc..8c53c8f25d81 100644
--- a/drivers/mtd/maps/amd76xrom.c
+++ b/drivers/mtd/maps/amd76xrom.c
@@ -152,6 +152,8 @@ static int amd76xrom_init_one(struct pci_dev *pdev,
 		printk(KERN_ERR MOD_NAME
 		       " %s(): Unable to register resource %pR - kernel bug?\n",
 		       __func__, &window->rsrc);
+		pci_dev_put(window->pdev);
+		window->pdev = NULL;
 		return -EBUSY;
 	}
 
-- 
2.34.1