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, 10 insertions, 2 deletions

diff --git a/drivers/ide/ide-lib.c b/drivers/ide/ide-lib.c
index fa4c194b5ed..c859de77aa8 100644
--- a/drivers/ide/ide-lib.c
+++ b/drivers/ide/ide-lib.c
@@ -290,7 +290,8 @@ void ide_set_pio(ide_drive_t *drive, u8 req_pio)
         ide_hwif_t *hwif = drive->hwif;
         u8 host_pio, pio;
 
-        if (hwif->set_pio_mode == NULL)
+        if (hwif->set_pio_mode == NULL ||
+            (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
                 return;
 
         BUG_ON(hwif->pio_mask == 0x00);
@@ -343,6 +344,9 @@ int ide_set_pio_mode(ide_drive_t *drive, const u8 mode)
 {
         ide_hwif_t *hwif = drive->hwif;
 
+        if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
+                return 0;
+
         if (hwif->set_pio_mode == NULL)
                 return -1;
 
@@ -370,6 +374,9 @@ int ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
 {
         ide_hwif_t *hwif = drive->hwif;
 
+        if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
+                return 0;
+
         if (hwif->set_dma_mode == NULL)
                 return -1;
 
@@ -400,7 +407,8 @@ int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
 {
         ide_hwif_t *hwif = drive->hwif;
 
-        if (hwif->set_dma_mode == NULL)
+        if (hwif->set_dma_mode == NULL ||
+            (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
                 return -1;
 
         rate = ide_rate_filter(drive, rate);