ide: sanitize handling of IDE_HFLAG_NO_SET_MODE host flag

* Check for IDE_HFLAG_NO_SET_MODE host flag in ide_set_pio(),
  ide_set_[pio,dma]_mode(), ide_set_xfer_rate() and set_pio_mode().

* Remove no longer needed IDE_HFLAG_NO_SET_MODE host flag checking
  from ide_tune_dma().

* Remove superfluous ->set_pio_mode checking from do_special().

This is a part of preparations for adding 'struct ide_port_ops'.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index f04b53cb023f..d868ca44d033 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -584,11 +584,13 @@ out:
 int set_pio_mode(ide_drive_t *drive, int arg)
 {
         struct request rq;
+        ide_hwif_t *hwif = drive->hwif;
 
         if (arg < 0 || arg > 255)
                 return -EINVAL;
 
-        if (drive->hwif->set_pio_mode == NULL)
+        if (hwif->set_pio_mode == NULL ||
+            (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
                 return -ENOSYS;
 
         if (drive->special.b.set_tune)