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>
diff --git a/drivers/ide/ide-dma-sff.c b/drivers/ide/ide-dma-sff.c
index 16fc46e..e4cdf78 100644
--- a/drivers/ide/ide-dma-sff.c
+++ b/drivers/ide/ide-dma-sff.c
@@ -277,8 +277,6 @@
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 @@
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 @@
/* 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;
}