[SCSI] fas216: Use scsi_eh API for REQUEST_SENSE invocation

Use new scsi_eh_prep/restor_cmnd() for synchronous REQUEST_SENSE
invocation.  This also converts the driver to the new accessor based
scatterlist implementation.

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Tested-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

2 files changed, 6 insertions, 13 deletions

diff --git a/drivers/scsi/arm/fas216.c b/drivers/scsi/arm/fas216.c
index fb5f20284389..a715632e19d4 100644
--- a/drivers/scsi/arm/fas216.c
+++ b/drivers/scsi/arm/fas216.c
@@ -2018,6 +2018,7 @@ static void fas216_rq_sns_done(FAS216_Info *info, struct scsi_cmnd *SCpnt,
          * the upper layers to process.  This would have been set
          * correctly by fas216_std_done.
          */
+        scsi_eh_restore_cmnd(SCpnt, &info->ses);
         SCpnt->scsi_done(SCpnt);
 }
 
@@ -2103,23 +2104,12 @@ request_sense:
         if (SCpnt->cmnd[0] == REQUEST_SENSE)
                 goto done;
 
+        scsi_eh_prep_cmnd(SCpnt, &info->ses, NULL, 0, ~0);
         fas216_log_target(info, LOG_CONNECT, SCpnt->device->id,
                           "requesting sense");
-        memset(SCpnt->cmnd, 0, sizeof (SCpnt->cmnd));
-        SCpnt->cmnd[0] = REQUEST_SENSE;
-        SCpnt->cmnd[1] = SCpnt->device->lun << 5;
-        SCpnt->cmnd[4] = sizeof(SCpnt->sense_buffer);
-        SCpnt->cmd_len = COMMAND_SIZE(SCpnt->cmnd[0]);
-        SCpnt->SCp.buffer = NULL;
-        SCpnt->SCp.buffers_residual = 0;
-        SCpnt->SCp.ptr = (char *)SCpnt->sense_buffer;
-        SCpnt->SCp.this_residual = sizeof(SCpnt->sense_buffer);
-        SCpnt->SCp.phase = sizeof(SCpnt->sense_buffer);
+        init_SCp(SCpnt);
         SCpnt->SCp.Message = 0;
         SCpnt->SCp.Status = 0;
-        SCpnt->request_bufflen = sizeof(SCpnt->sense_buffer);
-        SCpnt->sc_data_direction = DMA_FROM_DEVICE;
-        SCpnt->use_sg = 0;
         SCpnt->tag = 0;
         SCpnt->host_scribble = (void *)fas216_rq_sns_done;
 
diff --git a/drivers/scsi/arm/fas216.h b/drivers/scsi/arm/fas216.h
index 00e5f055afdc..3e73e264972e 100644
--- a/drivers/scsi/arm/fas216.h
+++ b/drivers/scsi/arm/fas216.h
@@ -16,6 +16,8 @@
 #define NO_IRQ 255
 #endif
 
+#include <scsi/scsi_eh.h>
+
 #include "queue.h"
 #include "msgqueue.h"
 
@@ -311,6 +313,7 @@ typedef struct {
 
         /* miscellaneous */
         int                     internal_done;          /* flag to indicate request done */
+        struct scsi_eh_save     *ses;           /* holds request sense restore info */
         unsigned long           magic_end;
 } FAS216_Info;