isci: cleanup request allocation
Rather than return an error code and update a pointer that was passed by
reference just return the request object directly (or null if allocation
failed).
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/scsi/isci/task.c b/drivers/scsi/isci/task.c
index 01032dc..ded81cd 100644
--- a/drivers/scsi/isci/task.c
+++ b/drivers/scsi/isci/task.c
@@ -146,7 +146,6 @@
int isci_task_execute_task(struct sas_task *task, int num, gfp_t gfp_flags)
{
struct isci_host *ihost = dev_to_ihost(task->dev);
- struct isci_request *request = NULL;
struct isci_remote_device *device;
unsigned long flags;
int ret;
@@ -226,8 +225,7 @@
spin_unlock_irqrestore(&task->task_state_lock, flags);
/* build and send the request. */
- status = isci_request_execute(ihost, task, &request,
- gfp_flags);
+ status = isci_request_execute(ihost, task, gfp_flags);
if (status != SCI_SUCCESS) {
@@ -254,54 +252,34 @@
return 0;
}
-
-
-/**
- * isci_task_request_build() - This function builds the task request object.
- * @isci_host: This parameter specifies the ISCI host object
- * @request: This parameter points to the isci_request object allocated in the
- * request construct function.
- * @tmf: This parameter is the task management struct to be built
- *
- * SCI_SUCCESS on successfull completion, or specific failure code.
- */
-static enum sci_status isci_task_request_build(
- struct isci_host *isci_host,
- struct isci_request **isci_request,
- struct isci_tmf *isci_tmf)
+static struct isci_request *isci_task_request_build(struct isci_host *ihost,
+ struct isci_tmf *isci_tmf)
{
- struct scic_sds_remote_device *sci_device;
+ struct scic_sds_remote_device *sci_dev;
enum sci_status status = SCI_FAILURE;
- struct isci_request *request = NULL;
- struct isci_remote_device *isci_device;
+ struct isci_request *ireq = NULL;
+ struct isci_remote_device *idev;
struct domain_device *dev;
- dev_dbg(&isci_host->pdev->dev,
+ dev_dbg(&ihost->pdev->dev,
"%s: isci_tmf = %p\n", __func__, isci_tmf);
- isci_device = isci_tmf->device;
- sci_device = &isci_device->sci;
- dev = isci_device->domain_dev;
+ idev = isci_tmf->device;
+ sci_dev = &idev->sci;
+ dev = idev->domain_dev;
/* do common allocation and init of request object. */
- status = isci_request_alloc_tmf(
- isci_host,
- isci_tmf,
- &request,
- isci_device,
- GFP_ATOMIC
- );
-
- if (status != SCI_SUCCESS)
- goto out;
+ ireq = isci_request_alloc_tmf(ihost, isci_tmf, idev, GFP_ATOMIC);
+ if (!ireq)
+ return NULL;
/* let the core do it's construct. */
- status = scic_task_request_construct(&isci_host->sci, sci_device,
+ status = scic_task_request_construct(&ihost->sci, sci_dev,
SCI_CONTROLLER_INVALID_IO_TAG,
- &request->sci);
+ &ireq->sci);
if (status != SCI_SUCCESS) {
- dev_warn(&isci_host->pdev->dev,
+ dev_warn(&ihost->pdev->dev,
"%s: scic_task_request_construct failed - "
"status = 0x%x\n",
__func__,
@@ -312,30 +290,23 @@
/* XXX convert to get this from task->tproto like other drivers */
if (dev->dev_type == SAS_END_DEV) {
isci_tmf->proto = SAS_PROTOCOL_SSP;
- status = scic_task_request_construct_ssp(&request->sci);
+ status = scic_task_request_construct_ssp(&ireq->sci);
if (status != SCI_SUCCESS)
goto errout;
}
if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) {
isci_tmf->proto = SAS_PROTOCOL_SATA;
- status = isci_sata_management_task_request_build(request);
+ status = isci_sata_management_task_request_build(ireq);
if (status != SCI_SUCCESS)
goto errout;
}
-
- goto out;
-
+ return ireq;
errout:
-
- /* release the dma memory if we fail. */
- isci_request_free(isci_host, request);
- request = NULL;
-
- out:
- *isci_request = request;
- return status;
+ isci_request_free(ihost, ireq);
+ ireq = NULL;
+ return ireq;
}
/**
@@ -350,16 +321,14 @@
* TMF_RESP_FUNC_COMPLETE on successful completion of the TMF (this includes
* error conditions reported in the IU status), or TMF_RESP_FUNC_FAILED.
*/
-int isci_task_execute_tmf(
- struct isci_host *isci_host,
- struct isci_tmf *tmf,
- unsigned long timeout_ms)
+int isci_task_execute_tmf(struct isci_host *ihost, struct isci_tmf *tmf,
+ unsigned long timeout_ms)
{
DECLARE_COMPLETION_ONSTACK(completion);
enum sci_task_status status = SCI_TASK_FAILURE;
struct scic_sds_remote_device *sci_device;
struct isci_remote_device *isci_device = tmf->device;
- struct isci_request *request;
+ struct isci_request *ireq;
int ret = TMF_RESP_FUNC_FAILED;
unsigned long flags;
unsigned long timeleft;
@@ -368,13 +337,13 @@
* if the device is not there and ready.
*/
if (!isci_device || isci_device->status != isci_ready_for_io) {
- dev_dbg(&isci_host->pdev->dev,
+ dev_dbg(&ihost->pdev->dev,
"%s: isci_device = %p not ready (%d)\n",
__func__,
isci_device, isci_device->status);
return TMF_RESP_FUNC_FAILED;
} else
- dev_dbg(&isci_host->pdev->dev,
+ dev_dbg(&ihost->pdev->dev,
"%s: isci_device = %p\n",
__func__, isci_device);
@@ -383,64 +352,59 @@
/* Assign the pointer to the TMF's completion kernel wait structure. */
tmf->complete = &completion;
- isci_task_request_build(
- isci_host,
- &request,
- tmf
- );
-
- if (!request) {
- dev_warn(&isci_host->pdev->dev,
+ ireq = isci_task_request_build(ihost, tmf);
+ if (!ireq) {
+ dev_warn(&ihost->pdev->dev,
"%s: isci_task_request_build failed\n",
__func__);
return TMF_RESP_FUNC_FAILED;
}
- spin_lock_irqsave(&isci_host->scic_lock, flags);
+ spin_lock_irqsave(&ihost->scic_lock, flags);
/* start the TMF io. */
status = scic_controller_start_task(
- &isci_host->sci,
+ &ihost->sci,
sci_device,
- &request->sci,
+ &ireq->sci,
SCI_CONTROLLER_INVALID_IO_TAG);
if (status != SCI_TASK_SUCCESS) {
- dev_warn(&isci_host->pdev->dev,
+ dev_warn(&ihost->pdev->dev,
"%s: start_io failed - status = 0x%x, request = %p\n",
__func__,
status,
- request);
- spin_unlock_irqrestore(&isci_host->scic_lock, flags);
+ ireq);
+ spin_unlock_irqrestore(&ihost->scic_lock, flags);
goto cleanup_request;
}
if (tmf->cb_state_func != NULL)
tmf->cb_state_func(isci_tmf_started, tmf, tmf->cb_data);
- isci_request_change_state(request, started);
+ isci_request_change_state(ireq, started);
/* add the request to the remote device request list. */
- list_add(&request->dev_node, &isci_device->reqs_in_process);
+ list_add(&ireq->dev_node, &isci_device->reqs_in_process);
- spin_unlock_irqrestore(&isci_host->scic_lock, flags);
+ spin_unlock_irqrestore(&ihost->scic_lock, flags);
/* Wait for the TMF to complete, or a timeout. */
timeleft = wait_for_completion_timeout(&completion,
jiffies + msecs_to_jiffies(timeout_ms));
if (timeleft == 0) {
- spin_lock_irqsave(&isci_host->scic_lock, flags);
+ spin_lock_irqsave(&ihost->scic_lock, flags);
if (tmf->cb_state_func != NULL)
tmf->cb_state_func(isci_tmf_timed_out, tmf, tmf->cb_data);
status = scic_controller_terminate_request(
- &request->isci_host->sci,
- &request->isci_device->sci,
- &request->sci);
+ &ireq->isci_host->sci,
+ &ireq->isci_device->sci,
+ &ireq->sci);
- spin_unlock_irqrestore(&isci_host->scic_lock, flags);
+ spin_unlock_irqrestore(&ihost->scic_lock, flags);
}
isci_print_tmf(tmf);
@@ -448,7 +412,7 @@
if (tmf->status == SCI_SUCCESS)
ret = TMF_RESP_FUNC_COMPLETE;
else if (tmf->status == SCI_FAILURE_IO_RESPONSE_VALID) {
- dev_dbg(&isci_host->pdev->dev,
+ dev_dbg(&ihost->pdev->dev,
"%s: tmf.status == "
"SCI_FAILURE_IO_RESPONSE_VALID\n",
__func__);
@@ -456,18 +420,18 @@
}
/* Else - leave the default "failed" status alone. */
- dev_dbg(&isci_host->pdev->dev,
+ dev_dbg(&ihost->pdev->dev,
"%s: completed request = %p\n",
__func__,
- request);
+ ireq);
- if (request->io_request_completion != NULL) {
+ if (ireq->io_request_completion != NULL) {
/* A thread is waiting for this TMF to finish. */
- complete(request->io_request_completion);
+ complete(ireq->io_request_completion);
}
cleanup_request:
- isci_request_free(isci_host, request);
+ isci_request_free(ihost, ireq);
return ret;
}