diff options
Diffstat (limited to 'drivers/s390/block/scm_blk_cluster.c')
| -rw-r--r-- | drivers/s390/block/scm_blk_cluster.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/drivers/s390/block/scm_blk_cluster.c b/drivers/s390/block/scm_blk_cluster.c index 9aae909d47a5..4787f80e5537 100644 --- a/drivers/s390/block/scm_blk_cluster.c +++ b/drivers/s390/block/scm_blk_cluster.c @@ -114,14 +114,14 @@ void scm_blk_dev_cluster_setup(struct scm_blk_dev *bdev) blk_queue_io_opt(bdev->rq, CLUSTER_SIZE); } -static void scm_prepare_cluster_request(struct scm_request *scmrq) +static int scm_prepare_cluster_request(struct scm_request *scmrq) { struct scm_blk_dev *bdev = scmrq->bdev; struct scm_device *scmdev = bdev->gendisk->private_data; struct request *req = scmrq->request; - struct aidaw *aidaw = scmrq->aidaw; struct msb *msb = &scmrq->aob->msb[0]; struct req_iterator iter; + struct aidaw *aidaw; struct bio_vec bv; int i = 0; u64 addr; @@ -131,6 +131,11 @@ static void scm_prepare_cluster_request(struct scm_request *scmrq) scmrq->cluster.state = CLUSTER_READ; /* fall through */ case CLUSTER_READ: + aidaw = scm_aidaw_alloc(); + if (!aidaw) + return -ENOMEM; + + memset(aidaw, 0, PAGE_SIZE); scmrq->aob->request.msb_count = 1; msb->bs = MSB_BS_4K; msb->oc = MSB_OC_READ; @@ -153,6 +158,7 @@ static void scm_prepare_cluster_request(struct scm_request *scmrq) break; case CLUSTER_WRITE: + aidaw = (void *) msb->data_addr; msb->oc = MSB_OC_WRITE; for (addr = msb->scm_addr; @@ -173,6 +179,7 @@ static void scm_prepare_cluster_request(struct scm_request *scmrq) } break; } + return 0; } bool scm_need_cluster_request(struct scm_request *scmrq) @@ -186,9 +193,13 @@ bool scm_need_cluster_request(struct scm_request *scmrq) /* Called with queue lock held. */ void scm_initiate_cluster_request(struct scm_request *scmrq) { - scm_prepare_cluster_request(scmrq); + if (scm_prepare_cluster_request(scmrq)) + goto requeue; if (eadm_start_aob(scmrq->aob)) - scm_request_requeue(scmrq); + goto requeue; + return; +requeue: + scm_request_requeue(scmrq); } bool scm_test_cluster_request(struct scm_request *scmrq) |