6.12-stable review patch. If anyone has any objections, please let me know.
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From: Ming Lei ming.lei@redhat.com
[ Upstream commit 4bf485a7db5d82ddd0f3ad2b299893199090375e ]
We need to retrieve 'hctx' from xarray table in the cpuhp callback, so the callback should be registered after this 'hctx' is added to xarray table.
Cc: Reinette Chatre reinette.chatre@intel.com Cc: Fenghua Yu fenghua.yu@intel.com Cc: Peter Newman peternewman@google.com Cc: Babu Moger babu.moger@amd.com Cc: Luck Tony tony.luck@intel.com Signed-off-by: Ming Lei ming.lei@redhat.com Tested-by: Tony Luck tony.luck@intel.com Link: https://lore.kernel.org/r/20241206111611.978870-2-ming.lei@redhat.com Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- block/blk-mq.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-)
diff --git a/block/blk-mq.c b/block/blk-mq.c index d5995021815d..4e76651e786d 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -3903,16 +3903,11 @@ static int blk_mq_init_hctx(struct request_queue *q, { hctx->queue_num = hctx_idx;
- if (!(hctx->flags & BLK_MQ_F_STACKING)) - cpuhp_state_add_instance_nocalls(CPUHP_AP_BLK_MQ_ONLINE, - &hctx->cpuhp_online); - cpuhp_state_add_instance_nocalls(CPUHP_BLK_MQ_DEAD, &hctx->cpuhp_dead); - hctx->tags = set->tags[hctx_idx];
if (set->ops->init_hctx && set->ops->init_hctx(hctx, set->driver_data, hctx_idx)) - goto unregister_cpu_notifier; + goto fail;
if (blk_mq_init_request(set, hctx->fq->flush_rq, hctx_idx, hctx->numa_node)) @@ -3921,6 +3916,11 @@ static int blk_mq_init_hctx(struct request_queue *q, if (xa_insert(&q->hctx_table, hctx_idx, hctx, GFP_KERNEL)) goto exit_flush_rq;
+ if (!(hctx->flags & BLK_MQ_F_STACKING)) + cpuhp_state_add_instance_nocalls(CPUHP_AP_BLK_MQ_ONLINE, + &hctx->cpuhp_online); + cpuhp_state_add_instance_nocalls(CPUHP_BLK_MQ_DEAD, &hctx->cpuhp_dead); + return 0;
exit_flush_rq: @@ -3929,8 +3929,7 @@ static int blk_mq_init_hctx(struct request_queue *q, exit_hctx: if (set->ops->exit_hctx) set->ops->exit_hctx(hctx, hctx_idx); - unregister_cpu_notifier: - blk_mq_remove_cpuhp(hctx); + fail: return -1; }