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ide: remove wmb() from ide-dma-sff.c and scc_pata.c 

This patch:
o replaces "mask" variable in ide_dma_end() with #define.
o removes use of wmb() in ide-dma-sff.c and scc_pata.c.
o is not tested - I don't have (or want) the HW.

Signed-off-by: Grant Grundler <grundler@google.com>
Cc: KOBAYASHI Yoshitake <yoshitake.kobayashi@toshiba.co.jp>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Grant Grundler 2009-04-08 14:12:49 +02:00 committed by Bartlomiej Zolnierkiewicz
parent d18812070e
commit edafcf73dc
2 changed files with 3 additions and 8 deletions
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9
drivers/ide/ide-dma-sff.c
View File

@ -277,8 +277,6 @@ void ide_dma_start(ide_drive_t *drive)
dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
outb(dma_cmd | ATA_DMA_START, hwif->dma_base + ATA_DMA_CMD);
}
wmb();
}
EXPORT_SYMBOL_GPL(ide_dma_start);
@ -286,7 +284,7 @@ EXPORT_SYMBOL_GPL(ide_dma_start);
int ide_dma_end(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
u8 dma_stat = 0, dma_cmd = 0, mask;
u8 dma_stat = 0, dma_cmd = 0;
/* stop DMA */
if (hwif->host_flags & IDE_HFLAG_MMIO) {
@ -304,11 +302,10 @@ int ide_dma_end(ide_drive_t *drive)
/* clear INTR & ERROR bits */
ide_dma_sff_write_status(hwif, dma_stat | ATA_DMA_ERR | ATA_DMA_INTR);
wmb();
#define CHECK_DMA_MASK (ATA_DMA_ACTIVE | ATA_DMA_ERR | ATA_DMA_INTR)
/* verify good DMA status */
mask = ATA_DMA_ACTIVE | ATA_DMA_ERR | ATA_DMA_INTR;
if ((dma_stat & mask) != ATA_DMA_INTR)
if ((dma_stat & CHECK_DMA_MASK) != ATA_DMA_INTR)
return 0x10 | dma_stat;
return 0;
}

2
drivers/ide/scc_pata.c
View File

@ -337,7 +337,6 @@ static void scc_dma_start(ide_drive_t *drive)
/* start DMA */
scc_ide_outb(dma_cmd | 1, hwif->dma_base);
wmb();
}
static int __scc_dma_end(ide_drive_t *drive)
@ -354,7 +353,6 @@ static int __scc_dma_end(ide_drive_t *drive)
/* clear the INTR & ERROR bits */
scc_ide_outb(dma_stat | 6, hwif->dma_base + 4);
/* verify good DMA status */
wmb();
return (dma_stat & 7) != 4 ? (0x10 | dma_stat) : 0;
}