[PATCH] mtd: maps: l440gx: Fix double put of the PM device in init_l440gx()

[Wentao Liang]

The PIIX4 PM device reference taken with pci_get_device() is dropped
again before the iobase resource is allocated.  If pci_assign_resource()
fails, the error path calls pci_dev_put() on pm_dev a second time,
releasing a reference that is no longer owned and underflowing the
reference count.

Remove the extra pci_dev_put().

Fixes: dd8e9ed6ed54 ("[MTD] Switch to pci_get_device and do ref counting")
Cc: stable at vger.kernel.org
Signed-off-by: Wentao Liang <vulab at iscas.ac.cn>
---
 drivers/mtd/maps/l440gx.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/mtd/maps/l440gx.c b/drivers/mtd/maps/l440gx.c
index 85cd273ce065..1df5ea5fafca 100644
--- a/drivers/mtd/maps/l440gx.c
+++ b/drivers/mtd/maps/l440gx.c
@@ -110,7 +110,6 @@ static int __init init_l440gx(void)
 
 		/* Allocate the resource region */
 		if (pci_assign_resource(pm_dev, PIIXE_IOBASE_RESOURCE) != 0) {
-			pci_dev_put(pm_dev);
 			printk(KERN_WARNING "Could not allocate pm iobase resource\n");
 			iounmap(l440gx_map.virt);
 			return -ENXIO;
-- 
2.34.1