提交 3a8b788f 编写于 作者: T Thang Q. Nguyen 提交者: Jeff Garzik

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: NThang Q. Nguyen <tqnguyen@apm.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>
上级 2fc75da0
......@@ -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)
{
ap->link.flags |= ATA_LFLAG_NO_HRST;
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
*/
......@@ -1604,6 +1625,7 @@ static struct ata_port_operations sata_dwc_ops = {
.inherits = &ata_sff_port_ops,
.error_handler = sata_dwc_error_handler,
.hardreset = sata_dwc_hardreset,
.qc_prep = sata_dwc_qc_prep,
.qc_issue = sata_dwc_qc_issue,
......
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