diff options
Diffstat (limited to 'drivers/scsi/ibmvscsi/ibmvscsi.c')
| -rw-r--r-- | drivers/scsi/ibmvscsi/ibmvscsi.c | 64 |
1 files changed, 49 insertions, 15 deletions
diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c index 944fc1203ebd..669ea4fff166 100644 --- a/drivers/scsi/ibmvscsi/ibmvscsi.c +++ b/drivers/scsi/ibmvscsi/ibmvscsi.c @@ -535,6 +535,7 @@ static int ibmvscsi_send_srp_event(struct srp_event_struct *evt_struct, struct ibmvscsi_host_data *hostdata) { u64 *crq_as_u64 = (u64 *) &evt_struct->crq; + int request_status; int rc; /* If we have exhausted our request limit, just fail this request. @@ -542,9 +543,18 @@ static int ibmvscsi_send_srp_event(struct srp_event_struct *evt_struct, * (such as task management requests) that the mid layer may think we * can handle more requests (can_queue) when we actually can't */ - if ((evt_struct->crq.format == VIOSRP_SRP_FORMAT) && - (atomic_dec_if_positive(&hostdata->request_limit) < 0)) - goto send_error; + if (evt_struct->crq.format == VIOSRP_SRP_FORMAT) { + request_status = + atomic_dec_if_positive(&hostdata->request_limit); + /* If request limit was -1 when we started, it is now even + * less than that + */ + if (request_status < -1) + goto send_error; + /* Otherwise, if we have run out of requests */ + else if (request_status < 0) + goto send_busy; + } /* Copy the IU into the transfer area */ *evt_struct->xfer_iu = evt_struct->iu; @@ -567,11 +577,23 @@ static int ibmvscsi_send_srp_event(struct srp_event_struct *evt_struct, return 0; - send_error: + send_busy: unmap_cmd_data(&evt_struct->iu.srp.cmd, evt_struct, hostdata->dev); free_event_struct(&hostdata->pool, evt_struct); return SCSI_MLQUEUE_HOST_BUSY; + + send_error: + unmap_cmd_data(&evt_struct->iu.srp.cmd, evt_struct, hostdata->dev); + + if (evt_struct->cmnd != NULL) { + evt_struct->cmnd->result = DID_ERROR << 16; + evt_struct->cmnd_done(evt_struct->cmnd); + } else if (evt_struct->done) + evt_struct->done(evt_struct); + + free_event_struct(&hostdata->pool, evt_struct); + return 0; } /** @@ -1184,27 +1206,37 @@ void ibmvscsi_handle_crq(struct viosrp_crq *crq, return; case 0xFF: /* Hypervisor telling us the connection is closed */ scsi_block_requests(hostdata->host); + atomic_set(&hostdata->request_limit, 0); if (crq->format == 0x06) { /* We need to re-setup the interpartition connection */ printk(KERN_INFO "ibmvscsi: Re-enabling adapter!\n"); - atomic_set(&hostdata->request_limit, -1); purge_requests(hostdata, DID_REQUEUE); - if (ibmvscsi_reenable_crq_queue(&hostdata->queue, - hostdata) == 0) - if (ibmvscsi_send_crq(hostdata, - 0xC001000000000000LL, 0)) + if ((ibmvscsi_reenable_crq_queue(&hostdata->queue, + hostdata) == 0) || + (ibmvscsi_send_crq(hostdata, + 0xC001000000000000LL, 0))) { + atomic_set(&hostdata->request_limit, + -1); printk(KERN_ERR - "ibmvscsi: transmit error after" + "ibmvscsi: error after" " enable\n"); + } } else { printk(KERN_INFO "ibmvscsi: Virtual adapter failed rc %d!\n", crq->format); - atomic_set(&hostdata->request_limit, -1); purge_requests(hostdata, DID_ERROR); - ibmvscsi_reset_crq_queue(&hostdata->queue, hostdata); + if ((ibmvscsi_reset_crq_queue(&hostdata->queue, + hostdata)) || + (ibmvscsi_send_crq(hostdata, + 0xC001000000000000LL, 0))) { + atomic_set(&hostdata->request_limit, + -1); + printk(KERN_ERR + "ibmvscsi: error after reset\n"); + } } scsi_unblock_requests(hostdata->host); return; @@ -1467,6 +1499,7 @@ static int ibmvscsi_probe(struct vio_dev *vdev, const struct vio_device_id *id) struct Scsi_Host *host; struct device *dev = &vdev->dev; unsigned long wait_switch = 0; + int rc; vdev->dev.driver_data = NULL; @@ -1484,8 +1517,8 @@ static int ibmvscsi_probe(struct vio_dev *vdev, const struct vio_device_id *id) atomic_set(&hostdata->request_limit, -1); hostdata->host->max_sectors = 32 * 8; /* default max I/O 32 pages */ - if (ibmvscsi_init_crq_queue(&hostdata->queue, hostdata, - max_requests) != 0) { + rc = ibmvscsi_init_crq_queue(&hostdata->queue, hostdata, max_requests); + if (rc != 0 && rc != H_RESOURCE) { printk(KERN_ERR "ibmvscsi: couldn't initialize crq\n"); goto init_crq_failed; } @@ -1505,7 +1538,8 @@ static int ibmvscsi_probe(struct vio_dev *vdev, const struct vio_device_id *id) * to fail if the other end is not acive. In that case we don't * want to scan */ - if (ibmvscsi_send_crq(hostdata, 0xC001000000000000LL, 0) == 0) { + if (ibmvscsi_send_crq(hostdata, 0xC001000000000000LL, 0) == 0 + || rc == H_RESOURCE) { /* * Wait around max init_timeout secs for the adapter to finish * initializing. When we are done initializing, we will have a |