ide: add pointer to the current packet command to ide_drive_t

* Add pointer to the current packet command (struct ide_atapi_pc *pc)
  to ide_drive_t and use it instead of the pointer in struct ide_*_obj.

* Use drive->pc in ide_{issue,transfer}_pc() and ide_pc_intr()
  instead of 'pc' argument.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 28 insertions, 30 deletions

diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c
index b9bfec24e913..bb8b3b123c7d 100644
--- a/drivers/scsi/ide-scsi.c
+++ b/drivers/scsi/ide-scsi.c
@@ -82,7 +82,6 @@ typedef struct ide_scsi_obj {
         struct gendisk          *disk;
         struct Scsi_Host        *host;
 
-        struct ide_atapi_pc *pc;                /* Current packet command */
         unsigned long transform;                /* SCSI cmd translation layer */
         unsigned long log;                      /* log flags */
 } idescsi_scsi_t;
@@ -140,7 +139,7 @@ static int idescsi_end_request(ide_drive_t *, int, int);
 static void ide_scsi_callback(ide_drive_t *drive, int dsc)
 {
         idescsi_scsi_t *scsi = drive_to_idescsi(drive);
-        struct ide_atapi_pc *pc = scsi->pc;
+        struct ide_atapi_pc *pc = drive->pc;
 
         if (pc->flags & PC_FLAG_TIMEDOUT)
                 debug_log("%s: got timed out packet %lu at %lu\n", __func__,
@@ -267,7 +266,7 @@ static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs)
         spin_unlock_irqrestore(host->host_lock, flags);
         kfree(pc);
         blk_put_request(rq);
-        scsi->pc = NULL;
+        drive->pc = NULL;
         return 0;
 }
 
@@ -278,8 +277,7 @@ static inline unsigned long get_timeout(struct ide_atapi_pc *pc)
 
 static int idescsi_expiry(ide_drive_t *drive)
 {
-        idescsi_scsi_t *scsi = drive_to_idescsi(drive);
-        struct ide_atapi_pc   *pc   = scsi->pc;
+        struct ide_atapi_pc *pc = drive->pc;
 
         debug_log("%s called for %lu at %lu\n", __func__,
                   pc->scsi_cmd->serial_number, jiffies);
@@ -294,19 +292,14 @@ static int idescsi_expiry(ide_drive_t *drive)
  */
 static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
 {
-        idescsi_scsi_t *scsi = drive_to_idescsi(drive);
-        struct ide_atapi_pc *pc = scsi->pc;
-
-        return ide_pc_intr(drive, pc, idescsi_pc_intr, get_timeout(pc),
+        return ide_pc_intr(drive, idescsi_pc_intr, get_timeout(drive->pc),
                            idescsi_expiry, NULL, NULL, ide_io_buffers);
 }
 
 static ide_startstop_t idescsi_transfer_pc(ide_drive_t *drive)
 {
-        idescsi_scsi_t *scsi = drive_to_idescsi(drive);
-
-        return ide_transfer_pc(drive, scsi->pc, idescsi_pc_intr,
-                               get_timeout(scsi->pc), idescsi_expiry);
+        return ide_transfer_pc(drive, idescsi_pc_intr,
+                               get_timeout(drive->pc), idescsi_expiry);
 }
 
 static inline int idescsi_set_direction(struct ide_atapi_pc *pc)
@@ -351,12 +344,10 @@ static int idescsi_map_sg(ide_drive_t *drive, struct ide_atapi_pc *pc)
 static ide_startstop_t idescsi_issue_pc(ide_drive_t *drive,
                 struct ide_atapi_pc *pc)
 {
-        idescsi_scsi_t *scsi = drive_to_idescsi(drive);
-
         /* Set the current packet command */
-        scsi->pc = pc;
+        drive->pc = pc;
 
-        return ide_issue_pc(drive, pc, idescsi_transfer_pc,
+        return ide_issue_pc(drive, idescsi_transfer_pc,
                             get_timeout(pc), idescsi_expiry);
 }
 
@@ -621,6 +612,8 @@ static int idescsi_eh_abort (struct scsi_cmnd *cmd)
         int             busy;
         int             ret   = FAILED;
 
+        struct ide_atapi_pc *pc;
+
         /* In idescsi_eh_abort we try to gently pry our command from the ide subsystem */
 
         if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
@@ -641,26 +634,27 @@ static int idescsi_eh_abort (struct scsi_cmnd *cmd)
         spin_lock_irq(&ide_lock);
 
         /* If there is no pc running we're done (our interrupt took care of it) */
-        if (!scsi->pc) {
+        pc = drive->pc;
+        if (pc == NULL) {
                 ret = SUCCESS;
                 goto ide_unlock;
         }
 
         /* It's somewhere in flight. Does ide subsystem agree? */
-        if (scsi->pc->scsi_cmd->serial_number == cmd->serial_number && !busy &&
-            elv_queue_empty(drive->queue) && HWGROUP(drive)->rq != scsi->pc->rq) {
+        if (pc->scsi_cmd->serial_number == cmd->serial_number && !busy &&
+            elv_queue_empty(drive->queue) && HWGROUP(drive)->rq != pc->rq) {
                 /*
                  * FIXME - not sure this condition can ever occur
                  */
                 printk (KERN_ERR "ide-scsi: cmd aborted!\n");
 
-                if (blk_sense_request(scsi->pc->rq))
-                        kfree(scsi->pc->buf);
+                if (blk_sense_request(pc->rq))
+                        kfree(pc->buf);
                 /* we need to call blk_put_request twice. */
-                blk_put_request(scsi->pc->rq);
-                blk_put_request(scsi->pc->rq);
-                kfree(scsi->pc);
-                scsi->pc = NULL;
+                blk_put_request(pc->rq);
+                blk_put_request(pc->rq);
+                kfree(pc);
+                drive->pc = NULL;
 
                 ret = SUCCESS;
         }
@@ -682,6 +676,8 @@ static int idescsi_eh_reset (struct scsi_cmnd *cmd)
         int             ready = 0;
         int             ret   = SUCCESS;
 
+        struct ide_atapi_pc *pc;
+
         /* In idescsi_eh_reset we forcefully remove the command from the ide subsystem and reset the device. */
 
         if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
@@ -696,7 +692,9 @@ static int idescsi_eh_reset (struct scsi_cmnd *cmd)
         spin_lock_irq(cmd->device->host->host_lock);
         spin_lock(&ide_lock);
 
-        if (!scsi->pc || (req = scsi->pc->rq) != HWGROUP(drive)->rq || !HWGROUP(drive)->handler) {
+        pc = drive->pc;
+
+        if (pc == NULL || (req = pc->rq) != HWGROUP(drive)->rq || !HWGROUP(drive)->handler) {
                 printk (KERN_WARNING "ide-scsi: No active request in idescsi_eh_reset\n");
                 spin_unlock(&ide_lock);
                 spin_unlock_irq(cmd->device->host->host_lock);
@@ -707,9 +705,9 @@ static int idescsi_eh_reset (struct scsi_cmnd *cmd)
         if (__blk_end_request(req, -EIO, 0))
                 BUG();
         if (blk_sense_request(req))
-                kfree(scsi->pc->buf);
-        kfree(scsi->pc);
-        scsi->pc = NULL;
+                kfree(pc->buf);
+        kfree(pc);
+        drive->pc = NULL;
         blk_put_request(req);
 
         /* now nuke the drive queue */