diff options
Diffstat (limited to 'drivers/s390/scsi/zfcp_qdio.c')
| -rw-r--r-- | drivers/s390/scsi/zfcp_qdio.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c index 3a7f3374d10a..e78d65bd46b1 100644 --- a/drivers/s390/scsi/zfcp_qdio.c +++ b/drivers/s390/scsi/zfcp_qdio.c @@ -246,7 +246,7 @@ int zfcp_qdio_sbal_get(struct zfcp_qdio *qdio) } /** - * zfcp_qdio_send - set PCI flag in first SBALE and send req to QDIO + * zfcp_qdio_send - send req to QDIO * @qdio: pointer to struct zfcp_qdio * @q_req: pointer to struct zfcp_qdio_req * Returns: 0 on success, error otherwise @@ -260,17 +260,20 @@ int zfcp_qdio_send(struct zfcp_qdio *qdio, struct zfcp_qdio_req *q_req) zfcp_qdio_account(qdio); spin_unlock(&qdio->stat_lock); + atomic_sub(sbal_number, &qdio->req_q_free); + retval = do_QDIO(qdio->adapter->ccw_device, QDIO_FLAG_SYNC_OUTPUT, 0, q_req->sbal_first, sbal_number); if (unlikely(retval)) { + /* Failed to submit the IO, roll back our modifications. */ + atomic_add(sbal_number, &qdio->req_q_free); zfcp_qdio_zero_sbals(qdio->req_q, q_req->sbal_first, sbal_number); return retval; } /* account for transferred buffers */ - atomic_sub(sbal_number, &qdio->req_q_free); qdio->req_q_idx += sbal_number; qdio->req_q_idx %= QDIO_MAX_BUFFERS_PER_Q; |