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Commit c4199930 authored by Sergei Shtylyov's avatar Sergei Shtylyov Committed by Bartlomiej Zolnierkiewicz
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ide-iops: only clear DMA words on setting DMA mode 



The bytes indicating current DMA mode in the identify data words 62, 63, and 88
should only change on setting a DMA mode, so stop clearing them  on setting PIO
mode in ide_config_drive_speed().  While at it, correct SW/MW DMA mode masks...

Signed-off-by: default avatarSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent 8d64fcd9

drivers/ide/ide-iops.c

+5 −3
Original line number Diff line number Diff line
@@ -386,9 +386,11 @@ int ide_config_drive_speed(ide_drive_t *drive, u8 speed) 
		return error;

	}



	if (speed >= XFER_SW_DMA_0) {

		id[ATA_ID_UDMA_MODES]  &= ~0xFF00;

	id[ATA_ID_MWDMA_MODES] &= ~0x0F00;

	id[ATA_ID_SWDMA_MODES] &= ~0x0F00;

		id[ATA_ID_MWDMA_MODES] &= ~0x0700;

		id[ATA_ID_SWDMA_MODES] &= ~0x0700;

	}



 skip:

#ifdef CONFIG_BLK_DEV_IDEDMA