From: Aristeu Rozanski Date: Thu, 5 Dec 2013 15:37:56 +0000 (-0500) Subject: e752x_edac: Fix pci_dev usage count X-Git-Tag: v3.4.79~34 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=09f4c0c705978deb05c74b71874b3f73e55a3b77;p=thirdparty%2Fkernel%2Fstable.git e752x_edac: Fix pci_dev usage count 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 Reviewed-by: mark gross Link: http://lkml.kernel.org/r/20131205153755.GL4545@redhat.com Signed-off-by: Borislav Petkov Cc: Jean Delvare Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/edac/e752x_edac.c b/drivers/edac/e752x_edac.c index 41223261ede9b..b73beba0aa248 100644 --- a/drivers/edac/e752x_edac.c +++ b/drivers/edac/e752x_edac.c @@ -1145,9 +1145,11 @@ static int e752x_get_devs(struct pci_dev *pdev, int dev_idx, 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:"