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 <jia.zhang@windriver.com>
Signed-off-by: Borislav Petkov <bp@alien8.de>
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 @@
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 @@
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 @@
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 @@
void __exit edac_mc_sysfs_exit(void)
{
- device_del(mci_pdev);
- put_device(mci_pdev);
+ device_unregister(mci_pdev);
edac_put_sysfs_subsys();
}