This is a note to let you know that I've just added the patch titled
e752x_edac: Fix pci_dev usage count
to the 3.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
e752x_edac-fix-pci_dev-usage-count.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 90ed4988b8c030d65b41b7d13140e9376dc6ec5a Mon Sep 17 00:00:00 2001
From: Aristeu Rozanski <aris@xxxxxxxxxx>
Date: Thu, 5 Dec 2013 10:37:56 -0500
Subject: e752x_edac: Fix pci_dev usage count
From: Aristeu Rozanski <aris@xxxxxxxxxx>
commit 90ed4988b8c030d65b41b7d13140e9376dc6ec5a upstream.
In case the device 0, function 1 is not found using pci_get_device(),
pci_scan_single_device() will be used but, differently than
pci_get_device(), it allocates a pci_dev but doesn't does bump the usage
count on the pci_dev and after few module removals and loads the pci_dev
will be freed.
Signed-off-by: Aristeu Rozanski <aris@xxxxxxxxxx>
Reviewed-by: mark gross <mark.gross@xxxxxxxxx>
Link: http://lkml.kernel.org/r/20131205153755.GL4545@xxxxxxxxxx
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Cc: Jean Delvare <jdelvare@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/edac/e752x_edac.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/edac/e752x_edac.c
+++ b/drivers/edac/e752x_edac.c
@@ -1182,9 +1182,11 @@ static int e752x_get_devs(struct pci_dev
pvt->bridge_ck = pci_get_device(PCI_VENDOR_ID_INTEL,
pvt->dev_info->err_dev, pvt->bridge_ck);
- if (pvt->bridge_ck == NULL)
+ if (pvt->bridge_ck == NULL) {
pvt->bridge_ck = pci_scan_single_device(pdev->bus,
PCI_DEVFN(0, 1));
+ pci_dev_get(pvt->bridge_ck);
+ }
if (pvt->bridge_ck == NULL) {
e752x_printk(KERN_ERR, "error reporting device not found:"
Patches currently in stable-queue which might be from aris@xxxxxxxxxx are
queue-3.12/e752x_edac-fix-pci_dev-usage-count.patch
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