Re: [PATCH] ide: convert ide_find_best_mode() users to use ide_max_dma_mode()

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Bartlomiej Zolnierkiewicz wrote:
ide-timing.h:

* remove handling of DMA modes from ide_find_best_mode() and rename it to
  ide_find_best_pio_mode()

* drop no longer needed "map" argument from ide_find_best_pio_mode()
  and delete needless ->id check

* remove no longer needed XFER_SWDMA and XFER_UDMA* defines

au1xxx-ide.c:

* use ide_max_dma_mode() instead of ide_find_best_mode()

* remove needless CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA #ifdef

amd74xx.c:

* store UDMA masks in amd_ide_chip[] and while at it make "base" field
  to be u8 instead of unsigned long

* convert the driver to use UDMA masks from amd_ide_chip[]

* use ide_max_dma_mode() and ide_find_best_pio_mode() instead
  of ide_find_best_mode()

* delete stale comment from amd74xx_ide_dma_check()

* remove no longer needed AMD_UDMA* defines

via82cxxx.c:

* remove unused DISPLAY_VIA_TIMINGS define

* store UDMA masks in via_isa_bridges[] and while at it make "flags" field
  to be u8 instead of u16

* convert the driver to use UDMA masks from via_isa_bridges[]

* use ide_max_dma_mode() and ide_find_best_pio_mode() instead
  of ide_find_best_mode()

* remove no longer needed VIA_UDMA* defines

pmac.c:

* use ide_max_dma_mode() instead of ide_find_best_mode()

There should be no functionality changes caused by this patch.

   I'm afraid this hasn't been accomplished yet. ;-)

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>

Index: b/drivers/ide/mips/au1xxx-ide.c
===================================================================
--- a/drivers/ide/mips/au1xxx-ide.c
+++ b/drivers/ide/mips/au1xxx-ide.c
@@ -381,9 +381,7 @@ static int auide_dma_setup(ide_drive_t *
static int auide_dma_check(ide_drive_t *drive)
 {
-	u8 speed;
-
-#ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
+	u8 speed = ide_max_dma_mode(drive);
if( dbdma_init_done == 0 ){

   Ugh, coding style isnn't kosher here. :-)

 		auide_hwif.white_list = ide_in_drive_list(drive->id,
@@ -394,7 +392,6 @@ static int auide_dma_check(ide_drive_t *
 		auide_ddma_init(&auide_hwif);
 		dbdma_init_done = 1;
 	}
-#endif
/* Is the drive in our DMA black list? */ @@ -409,8 +406,6 @@ static int auide_dma_check(ide_drive_t *
 	else
 		drive->using_dma = 1;
- speed = ide_find_best_mode(drive, XFER_PIO | XFER_MWDMA);
-	
 	if (drive->autodma && (speed & XFER_MODE) != XFER_PIO)

ide_max_dma_mode() returns 0 if DMA not available, so that if should have looked this way:

 	if (drive->autodma && speed)

 		return 0;

But is this really equivalent? Why there's no fallback call to ide_find_best_pio_mode() like in other cases?

MBR, Sergei
-
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