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, 3 insertions, 4 deletions

diff --git a/drivers/ide/icside.c b/drivers/ide/icside.c
index bdfeb1222d52..3628b2147902 100644
--- a/drivers/ide/icside.c
+++ b/drivers/ide/icside.c
@@ -307,15 +307,14 @@ static void icside_dma_start(ide_drive_t *drive)
         enable_dma(ec->dma);
 }
 
-static int icside_dma_setup(ide_drive_t *drive)
+static int icside_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd)
 {
         ide_hwif_t *hwif = drive->hwif;
         struct expansion_card *ec = ECARD_DEV(hwif->dev);
         struct icside_state *state = ecard_get_drvdata(ec);
-        struct request *rq = hwif->rq;
         unsigned int dma_mode;
 
-        if (rq_data_dir(rq))
+        if (cmd->tf_flags & IDE_TFLAG_WRITE)
                 dma_mode = DMA_MODE_WRITE;
         else
                 dma_mode = DMA_MODE_READ;
@@ -344,7 +343,7 @@ static int icside_dma_setup(ide_drive_t *drive)
          * Tell the DMA engine about the SG table and
          * data direction.
          */
-        set_dma_sg(ec->dma, hwif->sg_table, hwif->cmd.sg_nents);
+        set_dma_sg(ec->dma, hwif->sg_table, cmd->sg_nents);
         set_dma_mode(ec->dma, dma_mode);
 
         drive->waiting_for_dma = 1;