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path: root/drivers/scsi/libsas/sas_expander.c
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Diffstat (limited to 'drivers/scsi/libsas/sas_expander.c')
-rw-r--r--drivers/scsi/libsas/sas_expander.c120
1 files changed, 71 insertions, 49 deletions
diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c
index 30b8014bcc7..d31e6fa466f 100644
--- a/drivers/scsi/libsas/sas_expander.c
+++ b/drivers/scsi/libsas/sas_expander.c
@@ -71,55 +71,65 @@ static void smp_task_done(struct sas_task *task)
static int smp_execute_task(struct domain_device *dev, void *req, int req_size,
void *resp, int resp_size)
{
- int res;
- struct sas_task *task = sas_alloc_task(GFP_KERNEL);
+ int res, retry;
+ struct sas_task *task = NULL;
struct sas_internal *i =
to_sas_internal(dev->port->ha->core.shost->transportt);
- if (!task)
- return -ENOMEM;
-
- task->dev = dev;
- task->task_proto = dev->tproto;
- sg_init_one(&task->smp_task.smp_req, req, req_size);
- sg_init_one(&task->smp_task.smp_resp, resp, resp_size);
+ for (retry = 0; retry < 3; retry++) {
+ task = sas_alloc_task(GFP_KERNEL);
+ if (!task)
+ return -ENOMEM;
- task->task_done = smp_task_done;
+ task->dev = dev;
+ task->task_proto = dev->tproto;
+ sg_init_one(&task->smp_task.smp_req, req, req_size);
+ sg_init_one(&task->smp_task.smp_resp, resp, resp_size);
- task->timer.data = (unsigned long) task;
- task->timer.function = smp_task_timedout;
- task->timer.expires = jiffies + SMP_TIMEOUT*HZ;
- add_timer(&task->timer);
+ task->task_done = smp_task_done;
- res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL);
+ task->timer.data = (unsigned long) task;
+ task->timer.function = smp_task_timedout;
+ task->timer.expires = jiffies + SMP_TIMEOUT*HZ;
+ add_timer(&task->timer);
- if (res) {
- del_timer(&task->timer);
- SAS_DPRINTK("executing SMP task failed:%d\n", res);
- goto ex_err;
- }
+ res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL);
- wait_for_completion(&task->completion);
- res = -ETASK;
- if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
- SAS_DPRINTK("smp task timed out or aborted\n");
- i->dft->lldd_abort_task(task);
- if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
- SAS_DPRINTK("SMP task aborted and not done\n");
+ if (res) {
+ del_timer(&task->timer);
+ SAS_DPRINTK("executing SMP task failed:%d\n", res);
goto ex_err;
}
+
+ wait_for_completion(&task->completion);
+ res = -ETASK;
+ if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
+ SAS_DPRINTK("smp task timed out or aborted\n");
+ i->dft->lldd_abort_task(task);
+ if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
+ SAS_DPRINTK("SMP task aborted and not done\n");
+ goto ex_err;
+ }
+ }
+ if (task->task_status.resp == SAS_TASK_COMPLETE &&
+ task->task_status.stat == SAM_GOOD) {
+ res = 0;
+ break;
+ } else {
+ SAS_DPRINTK("%s: task to dev %016llx response: 0x%x "
+ "status 0x%x\n", __FUNCTION__,
+ SAS_ADDR(dev->sas_addr),
+ task->task_status.resp,
+ task->task_status.stat);
+ sas_free_task(task);
+ task = NULL;
+ }
}
- if (task->task_status.resp == SAS_TASK_COMPLETE &&
- task->task_status.stat == SAM_GOOD)
- res = 0;
- else
- SAS_DPRINTK("%s: task to dev %016llx response: 0x%x "
- "status 0x%x\n", __FUNCTION__,
- SAS_ADDR(dev->sas_addr),
- task->task_status.resp,
- task->task_status.stat);
ex_err:
- sas_free_task(task);
+ BUG_ON(retry == 3 && task != NULL);
+ if (task != NULL) {
+ sas_free_task(task);
+ }
return res;
}
@@ -587,10 +597,15 @@ static struct domain_device *sas_ex_discover_end_dev(
child->iproto = phy->attached_iproto;
memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
sas_hash_addr(child->hashed_sas_addr, child->sas_addr);
- phy->port = sas_port_alloc(&parent->rphy->dev, phy_id);
- BUG_ON(!phy->port);
- /* FIXME: better error handling*/
- BUG_ON(sas_port_add(phy->port) != 0);
+ if (!phy->port) {
+ phy->port = sas_port_alloc(&parent->rphy->dev, phy_id);
+ if (unlikely(!phy->port))
+ goto out_err;
+ if (unlikely(sas_port_add(phy->port) != 0)) {
+ sas_port_free(phy->port);
+ goto out_err;
+ }
+ }
sas_ex_get_linkrate(parent, child, phy);
if ((phy->attached_tproto & SAS_PROTO_STP) || phy->attached_sata_dev) {
@@ -605,8 +620,7 @@ static struct domain_device *sas_ex_discover_end_dev(
SAS_DPRINTK("report phy sata to %016llx:0x%x returned "
"0x%x\n", SAS_ADDR(parent->sas_addr),
phy_id, res);
- kfree(child);
- return NULL;
+ goto out_free;
}
memcpy(child->frame_rcvd, &child->sata_dev.rps_resp.rps.fis,
sizeof(struct dev_to_host_fis));
@@ -617,14 +631,14 @@ static struct domain_device *sas_ex_discover_end_dev(
"%016llx:0x%x returned 0x%x\n",
SAS_ADDR(child->sas_addr),
SAS_ADDR(parent->sas_addr), phy_id, res);
- kfree(child);
- return NULL;
+ goto out_free;
}
} else if (phy->attached_tproto & SAS_PROTO_SSP) {
child->dev_type = SAS_END_DEV;
rphy = sas_end_device_alloc(phy->port);
/* FIXME: error handling */
- BUG_ON(!rphy);
+ if (unlikely(!rphy))
+ goto out_free;
child->tproto = phy->attached_tproto;
sas_init_dev(child);
@@ -641,9 +655,7 @@ static struct domain_device *sas_ex_discover_end_dev(
"at %016llx:0x%x returned 0x%x\n",
SAS_ADDR(child->sas_addr),
SAS_ADDR(parent->sas_addr), phy_id, res);
- /* FIXME: this kfrees list elements without removing them */
- //kfree(child);
- return NULL;
+ goto out_list_del;
}
} else {
SAS_DPRINTK("target proto 0x%x at %016llx:0x%x not handled\n",
@@ -653,6 +665,16 @@ static struct domain_device *sas_ex_discover_end_dev(
list_add_tail(&child->siblings, &parent_ex->children);
return child;
+
+ out_list_del:
+ list_del(&child->dev_list_node);
+ sas_rphy_free(rphy);
+ out_free:
+ sas_port_delete(phy->port);
+ out_err:
+ phy->port = NULL;
+ kfree(child);
+ return NULL;
}
static struct domain_device *sas_ex_discover_expander(
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-10 14:32:40 +0000