ide: pass command to ide_map_sg()

* Set IDE_TFLAG_WRITE flag and ->rq also for ATA_CMD_PACKET
  commands.

* Pass command to ->dma_setup method and update all its
  implementations accordingly.

* Pass command instead of request to ide_build_sglist(),
  *_build_dmatable() and ide_map_sg().

While at it:

* Fix scc_dma_setup() documentation + use ATA_DMA_WR define.

* Rename sgiioc4_build_dma_table() to sgiioc4_build_dmatable(),
  change return value type to 'int' and drop unused 'ddir'
  argument.

* Do some minor cleanups in [tx4939]ide_dma_setup().

There should be no functional changes caused by this patch.

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

1 files changed, 6 insertions, 9 deletions

diff --git a/drivers/ide/au1xxx-ide.c b/drivers/ide/au1xxx-ide.c
index 3ace0cda5452..58485d6cb026 100644
--- a/drivers/ide/au1xxx-ide.c
+++ b/drivers/ide/au1xxx-ide.c
@@ -209,15 +209,14 @@ static void auide_set_dma_mode(ide_drive_t *drive, const u8 speed)
  */
 
 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
-static int auide_build_dmatable(ide_drive_t *drive)
+static int auide_build_dmatable(ide_drive_t *drive, struct ide_cmd *cmd)
 {
         ide_hwif_t *hwif = drive->hwif;
-        struct request *rq = hwif->rq;
         _auide_hwif *ahwif = &auide_hwif;
         struct scatterlist *sg;
-        int i = hwif->cmd.sg_nents, iswrite, count = 0;
+        int i = cmd->sg_nents, count = 0;
+        int iswrite = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
 
-        iswrite = (rq_data_dir(rq) == WRITE);
         /* Save for interrupt context */
         ahwif->drive = drive;
 
@@ -298,12 +297,10 @@ static void auide_dma_exec_cmd(ide_drive_t *drive, u8 command)
                             (2*WAIT_CMD), NULL);
 }
 
-static int auide_dma_setup(ide_drive_t *drive)
+static int auide_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd)
 {
-        struct request *rq = drive->hwif->rq;
-
-        if (!auide_build_dmatable(drive)) {
-                ide_map_sg(drive, rq);
+        if (auide_build_dmatable(drive, cmd) == 0) {
+                ide_map_sg(drive, cmd);
                 return 1;
         }