diff options
Diffstat (limited to 'drivers/edac/edac_mc.c')
| -rw-r--r-- | drivers/edac/edac_mc.c | 76 |
1 files changed, 40 insertions, 36 deletions
diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c index e6ecc7da38a5..7ee9419234aa 100644 --- a/drivers/edac/edac_mc.c +++ b/drivers/edac/edac_mc.c @@ -139,6 +139,12 @@ static struct sysdev_class edac_class = { static struct kobject edac_memctrl_kobj; static struct kobject edac_pci_kobj; +/* We use these to wait for the reference counts on edac_memctrl_kobj and + * edac_pci_kobj to reach 0. + */ +static struct completion edac_memctrl_kobj_complete; +static struct completion edac_pci_kobj_complete; + /* * /sys/devices/system/edac/mc; * data structures and methods @@ -244,6 +250,7 @@ static struct memctrl_dev_attribute *memctrl_attr[] = { static void edac_memctrl_master_release(struct kobject *kobj) { debugf1("%s()\n", __func__); + complete(&edac_memctrl_kobj_complete); } static struct kobj_type ktype_memctrl = { @@ -309,8 +316,12 @@ static void edac_sysfs_memctrl_teardown(void) #ifndef DISABLE_EDAC_SYSFS debugf0("MC: " __FILE__ ": %s()\n", __func__); - /* Unregister the MC's kobject */ + /* Unregister the MC's kobject and wait for reference count to reach + * 0. + */ + init_completion(&edac_memctrl_kobj_complete); kobject_unregister(&edac_memctrl_kobj); + wait_for_completion(&edac_memctrl_kobj_complete); /* Unregister the 'edac' object */ sysdev_class_unregister(&edac_class); @@ -563,6 +574,7 @@ static struct edac_pci_dev_attribute *edac_pci_attr[] = { static void edac_pci_release(struct kobject *kobj) { debugf1("%s()\n", __func__); + complete(&edac_pci_kobj_complete); } static struct kobj_type ktype_edac_pci = { @@ -610,8 +622,9 @@ static void edac_sysfs_pci_teardown(void) { #ifndef DISABLE_EDAC_SYSFS debugf0("%s()\n", __func__); - + init_completion(&edac_pci_kobj_complete); kobject_unregister(&edac_pci_kobj); + wait_for_completion(&edac_pci_kobj_complete); #endif } @@ -800,7 +813,11 @@ static struct csrowdev_attribute *csrow_attr[] = { /* No memory to release */ static void edac_csrow_instance_release(struct kobject *kobj) { + struct csrow_info *cs; + debugf1("%s()\n", __func__); + cs = container_of(kobj, struct csrow_info, kobj); + complete(&cs->kobj_complete); } static struct kobj_type ktype_csrow = { @@ -1055,11 +1072,10 @@ static struct mcidev_attribute *mci_attr[] = { static void edac_mci_instance_release(struct kobject *kobj) { struct mem_ctl_info *mci; - mci = container_of(kobj,struct mem_ctl_info,edac_mci_kobj); - debugf0("%s() idx=%d calling kfree\n", __func__, mci->mc_idx); - - kfree(mci); + mci = to_mci(kobj); + debugf0("%s() idx=%d\n", __func__, mci->mc_idx); + complete(&mci->kobj_complete); } static struct kobj_type ktype_mci = { @@ -1131,21 +1147,23 @@ static int edac_create_sysfs_mci_device(struct mem_ctl_info *mci) } } - /* Mark this MCI instance as having sysfs entries */ - mci->sysfs_active = MCI_SYSFS_ACTIVE; - return 0; /* CSROW error: backout what has already been registered, */ fail1: for ( i--; i >= 0; i--) { - if (csrow->nr_pages > 0) + if (csrow->nr_pages > 0) { + init_completion(&csrow->kobj_complete); kobject_unregister(&mci->csrows[i].kobj); + wait_for_completion(&csrow->kobj_complete); + } } fail0: + init_completion(&mci->kobj_complete); kobject_unregister(edac_mci_kobj); + wait_for_completion(&mci->kobj_complete); return err; } @@ -1163,13 +1181,17 @@ static void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci) /* remove all csrow kobjects */ for (i = 0; i < mci->nr_csrows; i++) { - if (mci->csrows[i].nr_pages > 0) + if (mci->csrows[i].nr_pages > 0) { + init_completion(&mci->csrows[i].kobj_complete); kobject_unregister(&mci->csrows[i].kobj); + wait_for_completion(&mci->csrows[i].kobj_complete); + } } sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK); - + init_completion(&mci->kobj_complete); kobject_unregister(&mci->edac_mci_kobj); + wait_for_completion(&mci->kobj_complete); #endif /* DISABLE_EDAC_SYSFS */ } @@ -1342,31 +1364,10 @@ EXPORT_SYMBOL(edac_mc_free); /** * edac_mc_free: Free a previously allocated 'mci' structure * @mci: pointer to a struct mem_ctl_info structure - * - * Free up a previously allocated mci structure - * A MCI structure can be in 2 states after being allocated - * by edac_mc_alloc(). - * 1) Allocated in a MC driver's probe, but not yet committed - * 2) Allocated and committed, by a call to edac_mc_add_mc() - * edac_mc_add_mc() is the function that adds the sysfs entries - * thus, this free function must determine which state the 'mci' - * structure is in, then either free it directly or - * perform kobject cleanup by calling edac_remove_sysfs_mci_device(). - * - * VOID Return */ void edac_mc_free(struct mem_ctl_info *mci) { - /* only if sysfs entries for this mci instance exist - * do we remove them and defer the actual kfree via - * the kobject 'release()' callback. - * - * Otherwise, do a straight kfree now. - */ - if (mci->sysfs_active == MCI_SYSFS_ACTIVE) - edac_remove_sysfs_mci_device(mci); - else - kfree(mci); + kfree(mci); } @@ -1456,7 +1457,8 @@ static void del_mc_from_global_list (struct mem_ctl_info *mci) EXPORT_SYMBOL(edac_mc_add_mc); /** - * edac_mc_add_mc: Insert the 'mci' structure into the mci global list + * edac_mc_add_mc: Insert the 'mci' structure into the mci global list and + * create sysfs entries associated with mci structure * @mci: pointer to the mci structure to be added to the list * * Return: @@ -1516,7 +1518,8 @@ fail0: EXPORT_SYMBOL(edac_mc_del_mc); /** - * edac_mc_del_mc: Remove the specified mci structure from global list + * edac_mc_del_mc: Remove sysfs entries for specified mci structure and + * remove mci structure from global list * @mci: Pointer to struct mem_ctl_info structure * * Returns: @@ -1528,6 +1531,7 @@ int edac_mc_del_mc(struct mem_ctl_info *mci) int rc = 1; debugf0("MC%d: %s()\n", mci->mc_idx, __func__); + edac_remove_sysfs_mci_device(mci); down(&mem_ctls_mutex); del_mc_from_global_list(mci); edac_printk(KERN_INFO, EDAC_MC, |