ide: add IDE_HFLAG_ABUSE_SET_DMA_MODE host flag

* Add IDE_HFLAG_ABUSE_SET_DMA_MODE host flag and use it to decide
  what to do with transfer modes < XFER_PIO_0 in ide_set_xfer_rate().

* Set IDE_HFLAG_ABUSE_SET_DMA_MODE in host drivers that need it
  (aec62xx, amd74xx, cs5520, cs5535, hpt34x, hpt366, pdc202xx_old,
  serverworks, tc86c001 and via82cxxx) and cleanup ->set_dma_mode
  methods in host drivers that don't (IDE core code guarantees that
  ->set_dma_mode will be called only for modes which are present
  in SWDMA/MWDMA/UDMA masks).

While at it:

* Add IDE_HFLAGS_HPT34X/HPT3XX/PDC202XX/SVWKS define in
  hpt34x/hpt366/pdc202xx_old/serverworks host driver.

There should be no functionality changes caused by this patch.

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 7 insertions, 5 deletions

diff --git a/drivers/ide/pci/hpt34x.c b/drivers/ide/pci/hpt34x.c
index ae6307fae4f9..dfba0d13fcd3 100644
--- a/drivers/ide/pci/hpt34x.c
+++ b/drivers/ide/pci/hpt34x.c
@@ -129,14 +129,18 @@ static void __devinit init_hwif_hpt34x(ide_hwif_t *hwif)
         hwif->set_dma_mode = &hpt34x_set_mode;
 }
 
+#define IDE_HFLAGS_HPT34X \
+        (IDE_HFLAG_NO_ATAPI_DMA | \
+         IDE_HFLAG_ABUSE_SET_DMA_MODE | \
+         IDE_HFLAG_NO_AUTODMA)
+
 static const struct ide_port_info hpt34x_chipsets[] __devinitdata = {
         { /* 0 */
                 .name           = "HPT343",
                 .init_chipset   = init_chipset_hpt34x,
                 .init_hwif      = init_hwif_hpt34x,
                 .extra          = 16,
-                .host_flags     = IDE_HFLAG_NO_ATAPI_DMA |
-                                  IDE_HFLAG_NO_AUTODMA,
+                .host_flags     = IDE_HFLAGS_HPT34X,
                 .pio_mask       = ATA_PIO5,
         },
         { /* 1 */
@@ -144,9 +148,7 @@ static const struct ide_port_info hpt34x_chipsets[] __devinitdata = {
                 .init_chipset   = init_chipset_hpt34x,
                 .init_hwif      = init_hwif_hpt34x,
                 .extra          = 16,
-                .host_flags     = IDE_HFLAG_NO_ATAPI_DMA |
-                                  IDE_HFLAG_NO_AUTODMA |
-                                  IDE_HFLAG_OFF_BOARD,
+                .host_flags     = IDE_HFLAGS_HPT34X | IDE_HFLAG_OFF_BOARD,
                 .pio_mask       = ATA_PIO5,
 #ifdef CONFIG_HPT34X_AUTODMA
                 .swdma_mask     = ATA_SWDMA2,