diff options
| -rw-r--r-- | block/blk-mq-cpu.c | 12 | ||||
| -rw-r--r-- | block/blk-mq.c | 9 | ||||
| -rw-r--r-- | block/blk-mq.h | 2 | ||||
| -rw-r--r-- | include/linux/blk-mq.h | 2 |
4 files changed, 15 insertions, 10 deletions
diff --git a/block/blk-mq-cpu.c b/block/blk-mq-cpu.c index 136ef8643bb..d2c253f71b8 100644 --- a/block/blk-mq-cpu.c +++ b/block/blk-mq-cpu.c @@ -18,14 +18,18 @@ static int blk_mq_main_cpu_notify(struct notifier_block *self, { unsigned int cpu = (unsigned long) hcpu; struct blk_mq_cpu_notifier *notify; + int ret = NOTIFY_OK; raw_spin_lock(&blk_mq_cpu_notify_lock); - list_for_each_entry(notify, &blk_mq_cpu_notify_list, list) - notify->notify(notify->data, action, cpu); + list_for_each_entry(notify, &blk_mq_cpu_notify_list, list) { + ret = notify->notify(notify->data, action, cpu); + if (ret != NOTIFY_OK) + break; + } raw_spin_unlock(&blk_mq_cpu_notify_lock); - return NOTIFY_OK; + return ret; } void blk_mq_register_cpu_notifier(struct blk_mq_cpu_notifier *notifier) @@ -45,7 +49,7 @@ void blk_mq_unregister_cpu_notifier(struct blk_mq_cpu_notifier *notifier) } void blk_mq_init_cpu_notifier(struct blk_mq_cpu_notifier *notifier, - void (*fn)(void *, unsigned long, unsigned int), + int (*fn)(void *, unsigned long, unsigned int), void *data) { notifier->notify = fn; diff --git a/block/blk-mq.c b/block/blk-mq.c index ef7ed5e95d6..5a3683fc5bd 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -1196,8 +1196,8 @@ void blk_mq_free_single_hw_queue(struct blk_mq_hw_ctx *hctx, } EXPORT_SYMBOL(blk_mq_free_single_hw_queue); -static void blk_mq_hctx_notify(void *data, unsigned long action, - unsigned int cpu) +static int blk_mq_hctx_notify(void *data, unsigned long action, + unsigned int cpu) { struct blk_mq_hw_ctx *hctx = data; struct request_queue *q = hctx->queue; @@ -1205,7 +1205,7 @@ static void blk_mq_hctx_notify(void *data, unsigned long action, LIST_HEAD(tmp); if (action != CPU_DEAD && action != CPU_DEAD_FROZEN) - return; + return NOTIFY_OK; /* * Move ctx entries to new CPU, if this one is going away. @@ -1220,7 +1220,7 @@ static void blk_mq_hctx_notify(void *data, unsigned long action, spin_unlock(&ctx->lock); if (list_empty(&tmp)) - return; + return NOTIFY_OK; ctx = blk_mq_get_ctx(q); spin_lock(&ctx->lock); @@ -1240,6 +1240,7 @@ static void blk_mq_hctx_notify(void *data, unsigned long action, blk_mq_run_hw_queue(hctx, true); blk_mq_put_ctx(ctx); + return NOTIFY_OK; } static void blk_mq_free_rq_map(struct blk_mq_tag_set *set, diff --git a/block/blk-mq.h b/block/blk-mq.h index 7db4fe4bd00..491dbd4e93f 100644 --- a/block/blk-mq.h +++ b/block/blk-mq.h @@ -39,7 +39,7 @@ int blk_mq_update_nr_requests(struct request_queue *q, unsigned int nr); */ struct blk_mq_cpu_notifier; void blk_mq_init_cpu_notifier(struct blk_mq_cpu_notifier *notifier, - void (*fn)(void *, unsigned long, unsigned int), + int (*fn)(void *, unsigned long, unsigned int), void *data); void blk_mq_register_cpu_notifier(struct blk_mq_cpu_notifier *notifier); void blk_mq_unregister_cpu_notifier(struct blk_mq_cpu_notifier *notifier); diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index f4542445333..4d2800567aa 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -8,7 +8,7 @@ struct blk_mq_tags; struct blk_mq_cpu_notifier { struct list_head list; void *data; - void (*notify)(void *data, unsigned long action, unsigned int cpu); + int (*notify)(void *data, unsigned long action, unsigned int cpu); }; struct blk_mq_ctxmap { |