Hello.
On 17-12-2011 6:34, Dan Williams wrote:
We invoke task->task_done() to free the task in the eh case, but at this
point we are prepared for scsi_eh_flush_done_q() to finish off the scmd.
Introduce sas_end_task() to capture the final response status from the
lldd and free the task.
Also take the opportunity to kill this warning.
drivers/scsi/libsas/sas_scsi_host.c: In function ‘sas_end_task’:
drivers/scsi/libsas/sas_scsi_host.c:102:3: warning: case value ‘2’ not in enumerated type ‘enum exec_status’ [-Wswitch]
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
---
drivers/scsi/libsas/sas_scsi_host.c | 61 +++++++++++++++++++----------------
include/scsi/libsas.h | 5 ++-
2 files changed, 37 insertions(+), 29 deletions(-)
diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c
index f32c628..13aee61 100644
--- a/drivers/scsi/libsas/sas_scsi_host.c
+++ b/drivers/scsi/libsas/sas_scsi_host.c
@@ -49,27 +49,12 @@
#include<linux/scatterlist.h>
#include<linux/libata.h>
-/* ---------- SCSI Host glue ---------- */
-
-static void sas_scsi_task_done(struct sas_task *task)
+/* record final status and free the task */
+static void sas_end_task(struct scsi_cmnd *sc, struct sas_task *task)
{
struct task_status_struct *ts =&task->task_status;
- struct scsi_cmnd *sc = task->uldd_task;
int hs = 0, stat = 0;
[...]
@@ -124,10 +109,32 @@ static void sas_scsi_task_done(struct sas_task *task)
break;
}
}
- ASSIGN_SAS_TASK(sc, NULL);
+
sc->result = (hs<< 16) | stat;
+ ASSIGN_SAS_TASK(sc, NULL);
list_del_init(&task->list);
sas_free_task(task);
+}
+
+static void sas_scsi_task_done(struct sas_task *task)
+{
+ struct scsi_cmnd *sc = task->uldd_task;
+
+ if (unlikely(task->task_state_flags& SAS_TASK_STATE_ABORTED)) {
+ /* Aborted tasks will be completed by the error handler */
+ SAS_DPRINTK("task done but aborted\n");
+ return;
+ }
+
+ if (unlikely(!sc)) {
+ SAS_DPRINTK("task_done called with non existing SCSI cmnd!\n");
+ list_del_init(&task->list);
+ sas_free_task(task);
+ return;
+ }
+
+ ASSIGN_SAS_TASK(sc, NULL);
Why do it twice -- once here and then in sas_end_task()?
+ sas_end_task(sc, task);
sc->scsi_done(sc);
}
MBR, Sergei
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