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Commit 498222f3 authored by Alan Cox's avatar Alan Cox Committed by Jeff Garzik
Browse files

pata_ali: Lots of problems still showing up with small ATAPI DMA 



Hopefully there is a better long term solution but for now lets favour
reliability.

Signed-off-by: default avatarAlan Cox <alan@redhat.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent 8f59a13a

drivers/ata/pata_ali.c

+17 −0
Original line number Diff line number Diff line
@@ -285,6 +285,21 @@ static void ali_lock_sectors(struct ata_device *adev) 
	adev->max_sectors = 255;

}



/**

 *	ali_check_atapi_dma	-	DMA check for most ALi controllers

 *	@adev: Device

 *

 *	Called to decide whether commands should be sent by DMA or PIO

 */

 

static int ali_check_atapi_dma(struct ata_queued_cmd *qc)

{

	/* If its not a media command, its not worth it */

	if (qc->nbytes < 2048)

		return -EOPNOTSUPP;

	return 0;

}



static struct scsi_host_template ali_sht = {

	.module			= THIS_MODULE,

	.name			= DRV_NAME,
@@ -381,6 +396,7 @@ static struct ata_port_operations ali_c2_port_ops = { 
	.mode_filter	= ata_pci_default_filter,

	.tf_load	= ata_tf_load,

	.tf_read	= ata_tf_read,

	.check_atapi_dma = ali_check_atapi_dma,

	.check_status 	= ata_check_status,

	.exec_command	= ata_exec_command,

	.dev_select 	= ata_std_dev_select,
@@ -418,6 +434,7 @@ static struct ata_port_operations ali_c5_port_ops = { 
	.mode_filter	= ata_pci_default_filter,

	.tf_load	= ata_tf_load,

	.tf_read	= ata_tf_read,

	.check_atapi_dma = ali_check_atapi_dma,

	.check_status 	= ata_check_status,

	.exec_command	= ata_exec_command,

	.dev_select 	= ata_std_dev_select,