ide: add ide_retry_pc() helper

* Add ide_create_request_sense_cmd() and ide_retry_pc() helpers
  and convert ide-{atapi,floppy,tape}.c to use them.

* Remove no longer used ide*_create_request_sense_cmd(),
  ide*_retry_pc() and 'retry_pc' argument from ide_pc_intr().

* Make ide_queue_pc_head() static.

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, 34 insertions, 5 deletions

diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index 184835141412..d758dcd87178 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -124,8 +124,8 @@ EXPORT_SYMBOL_GPL(ide_init_pc);
  * the current request, so that it will be processed immediately, on the next
  * pass through the driver.
  */
-void ide_queue_pc_head(ide_drive_t *drive, struct gendisk *disk,
-                       struct ide_atapi_pc *pc, struct request *rq)
+static void ide_queue_pc_head(ide_drive_t *drive, struct gendisk *disk,
+                              struct ide_atapi_pc *pc, struct request *rq)
 {
         blk_rq_init(NULL, rq);
         rq->cmd_type = REQ_TYPE_SPECIAL;
@@ -137,7 +137,6 @@ void ide_queue_pc_head(ide_drive_t *drive, struct gendisk *disk,
                 rq->cmd[13] = REQ_IDETAPE_PC1;
         ide_do_drive_cmd(drive, rq);
 }
-EXPORT_SYMBOL_GPL(ide_queue_pc_head);
 
 /*
  * Add a special packet command request to the tail of the request queue,
@@ -203,6 +202,37 @@ int ide_set_media_lock(ide_drive_t *drive, struct gendisk *disk, int on)
 }
 EXPORT_SYMBOL_GPL(ide_set_media_lock);
 
+void ide_create_request_sense_cmd(ide_drive_t *drive, struct ide_atapi_pc *pc)
+{
+        ide_init_pc(pc);
+        pc->c[0] = REQUEST_SENSE;
+        if (drive->media == ide_floppy) {
+                pc->c[4] = 255;
+                pc->req_xfer = 18;
+        } else {
+                pc->c[4] = 20;
+                pc->req_xfer = 20;
+        }
+}
+EXPORT_SYMBOL_GPL(ide_create_request_sense_cmd);
+
+/*
+ * Called when an error was detected during the last packet command.
+ * We queue a request sense packet command in the head of the request list.
+ */
+void ide_retry_pc(ide_drive_t *drive, struct gendisk *disk)
+{
+        struct request *rq = &drive->request_sense_rq;
+        struct ide_atapi_pc *pc = &drive->request_sense_pc;
+
+        (void)ide_read_error(drive);
+        ide_create_request_sense_cmd(drive, pc);
+        if (drive->media == ide_tape)
+                set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags);
+        ide_queue_pc_head(drive, disk, pc, rq);
+}
+EXPORT_SYMBOL_GPL(ide_retry_pc);
+
 int ide_scsi_expiry(ide_drive_t *drive)
 {
         struct ide_atapi_pc *pc = drive->pc;
@@ -219,7 +249,6 @@ EXPORT_SYMBOL_GPL(ide_scsi_expiry);
 /* TODO: unify the code thus making some arguments go away */
 ide_startstop_t ide_pc_intr(ide_drive_t *drive, ide_handler_t *handler,
         void (*update_buffers)(ide_drive_t *, struct ide_atapi_pc *),
-        void (*retry_pc)(ide_drive_t *),
         int (*io_buffers)(ide_drive_t *, struct ide_atapi_pc *, unsigned, int))
 {
         struct ide_atapi_pc *pc = drive->pc;
@@ -299,7 +328,7 @@ ide_startstop_t ide_pc_intr(ide_drive_t *drive, ide_handler_t *handler,
                         debug_log("[cmd %x]: check condition\n", rq->cmd[0]);
 
                         /* Retry operation */
-                        retry_pc(drive);
+                        ide_retry_pc(drive, rq->rq_disk);
 
                         /* queued, but not started */
                         return ide_stopped;