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Commit 3a8b788f authored by Thang Q. Nguyen's avatar Thang Q. Nguyen Committed by Jeff Garzik
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sata_dwc_460ex: support hardreset 



The hardreset operation is currently not supported. This causes
sometime the SATA driver does cause kernel crash because of
none-determined state.a This patch will fix the issue.

Signed-off-by: default avatarThang Q. Nguyen <tqnguyen@apm.com>
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
parent 2fc75da0

drivers/ata/sata_dwc_460ex.c

+23 −1
Original line number Original line Diff line number Diff line
@@ -1581,10 +1581,31 @@ static void sata_dwc_qc_prep(struct ata_queued_cmd *qc) 




static void sata_dwc_error_handler(struct ata_port *ap)

static void sata_dwc_error_handler(struct ata_port *ap)

{

{

	ap->link.flags |= ATA_LFLAG_NO_HRST;

	ata_sff_error_handler(ap);

	ata_sff_error_handler(ap);

}

}





int sata_dwc_hardreset(struct ata_link *link, unsigned int *class,

			unsigned long deadline)

{

	struct sata_dwc_device *hsdev = HSDEV_FROM_AP(link->ap);

	int ret;



	ret = sata_sff_hardreset(link, class, deadline);



	sata_dwc_enable_interrupts(hsdev);



	/* Reconfigure the DMA control register */

	out_le32(&hsdev->sata_dwc_regs->dmacr,

		 SATA_DWC_DMACR_TXRXCH_CLEAR);



	/* Reconfigure the DMA Burst Transaction Size register */

	out_le32(&hsdev->sata_dwc_regs->dbtsr,

		 SATA_DWC_DBTSR_MWR(AHB_DMA_BRST_DFLT) |

		 SATA_DWC_DBTSR_MRD(AHB_DMA_BRST_DFLT));



	return ret;

}



/*

/*

 * scsi mid-layer and libata interface structures

 * scsi mid-layer and libata interface structures

 */

 */
@@ -1604,6 +1625,7 @@ static struct ata_port_operations sata_dwc_ops = { 
	.inherits		= &ata_sff_port_ops,

	.inherits		= &ata_sff_port_ops,





	.error_handler		= sata_dwc_error_handler,

	.error_handler		= sata_dwc_error_handler,

	.hardreset		= sata_dwc_hardreset,





	.qc_prep		= sata_dwc_qc_prep,

	.qc_prep		= sata_dwc_qc_prep,

	.qc_issue		= sata_dwc_qc_issue,

	.qc_issue		= sata_dwc_qc_issue,