From 44d22e2404b3ce93a314654962d31acc8afcdd62 Mon Sep 17 00:00:00 2001 From: Lans Zhang Date: Mon, 24 Dec 2012 14:01:34 +0100 Subject: [PATCH] EDAC: Cleanup device deregistering path Use device_unregister to replace put_device + device_del for cleanup, and fix the potential use after free. Signed-off-by: Lans Zhang Signed-off-by: Borislav Petkov --- drivers/edac/edac_mc_sysfs.c | 18 ++++++------------ 1 file changed, 6 insertions(+), 12 deletions(-) diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c index a3b0119..0ca1ca7 100644 --- a/drivers/edac/edac_mc_sysfs.c +++ b/drivers/edac/edac_mc_sysfs.c @@ -472,8 +472,7 @@ static void edac_delete_csrow_objects(struct mem_ctl_info *mci) device_remove_file(&csrow->dev, dynamic_csrow_ce_count_attr[chan]); } - put_device(&mci->csrows[i]->dev); - device_del(&mci->csrows[i]->dev); + device_unregister(&mci->csrows[i]->dev); } } #endif @@ -1055,11 +1054,9 @@ fail: struct dimm_info *dimm = mci->dimms[i]; if (dimm->nr_pages == 0) continue; - put_device(&dimm->dev); - device_del(&dimm->dev); + device_unregister(&dimm->dev); } - put_device(&mci->dev); - device_del(&mci->dev); + device_unregister(&mci->dev); bus_unregister(&mci->bus); kfree(mci->bus.name); return err; @@ -1086,16 +1083,14 @@ void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci) if (dimm->nr_pages == 0) continue; edac_dbg(0, "removing device %s\n", dev_name(&dimm->dev)); - put_device(&dimm->dev); - device_del(&dimm->dev); + device_unregister(&dimm->dev); } } void edac_unregister_sysfs(struct mem_ctl_info *mci) { edac_dbg(1, "Unregistering device %s\n", dev_name(&mci->dev)); - put_device(&mci->dev); - device_del(&mci->dev); + device_unregister(&mci->dev); bus_unregister(&mci->bus); kfree(mci->bus.name); } @@ -1159,7 +1154,6 @@ int __init edac_mc_sysfs_init(void) void __exit edac_mc_sysfs_exit(void) { - device_del(mci_pdev); - put_device(mci_pdev); + device_unregister(mci_pdev); edac_put_sysfs_subsys(); } -- 2.7.4