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Commit a4f16610 authored by Albert Lee's avatar Albert Lee Committed by Jeff Garzik
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[PATCH] libata-dev: determine err_mask when error is found 



Changes:
- Determine err_mask directly when an error is found.
- Remove "qc->err_mask |= __ac_err_mask(status);" in ata_host_intr()

Signed-off-by: default avatarAlbert Lee <albertcc@tw.ibm.com>

============
Signed-off-by: default avatarJeff Garzik <jgarzik@pobox.com>
parent ea9b395f

drivers/scsi/libata-core.c

+19 −2
Original line number Diff line number Diff line
@@ -3265,6 +3265,7 @@ static int ata_pio_first_block(struct ata_port *ap) 
	/* sleep-wait for BSY to clear */

	DPRINTK("busy wait\n");

	if (ata_busy_sleep(ap, ATA_TMOUT_DATAOUT_QUICK, ATA_TMOUT_DATAOUT)) {

		qc->err_mask |= AC_ERR_ATA_BUS;

		ap->hsm_task_state = HSM_ST_TMOUT;

		goto err_out;

	}
@@ -3273,6 +3274,7 @@ static int ata_pio_first_block(struct ata_port *ap) 
	status = ata_chk_status(ap);

	if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) {

		/* device status error */

		qc->err_mask |= AC_ERR_ATA_BUS;

		ap->hsm_task_state = HSM_ST_ERR;

		goto err_out;

	}
@@ -4288,6 +4290,12 @@ inline unsigned int ata_host_intr (struct ata_port *ap, 


			/* before we do anything else, clear DMA-Start bit */

			ap->ops->bmdma_stop(qc);



			if (unlikely(host_stat & ATA_DMA_ERR)) {

				/* error when transfering data to/from memory */

				qc->err_mask |= AC_ERR_HOST_BUS;

				ap->hsm_task_state = HSM_ST_ERR;

			}

		}

		break;

	case HSM_ST:
@@ -4313,8 +4321,10 @@ inline unsigned int ata_host_intr (struct ata_port *ap, 
	ap->ops->irq_clear(ap);



	/* check error */

	if (unlikely((status & ATA_ERR) || (host_stat & ATA_DMA_ERR)))

	if (unlikely(status & (ATA_ERR | ATA_DF))) {

		qc->err_mask |= AC_ERR_DEV;

		ap->hsm_task_state = HSM_ST_ERR;

	}



fsm_start:

	switch (ap->hsm_task_state) {
@@ -4326,6 +4336,7 @@ inline unsigned int ata_host_intr (struct ata_port *ap, 
		/* check device status */

		if (unlikely((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ)) {

			/* Wrong status. Let EH handle this */

			qc->err_mask |= AC_ERR_ATA_BUS;

			ap->hsm_task_state = HSM_ST_ERR;

			goto fsm_start;

		}
@@ -4354,6 +4365,7 @@ inline unsigned int ata_host_intr (struct ata_port *ap, 
			/* ATA PIO protocol */

			if (unlikely((status & ATA_DRQ) == 0)) {

				/* handle BSY=0, DRQ=0 as error */

				qc->err_mask |= AC_ERR_ATA_BUS;

				ap->hsm_task_state = HSM_ST_ERR;

				goto fsm_start;

			}
@@ -4375,6 +4387,7 @@ inline unsigned int ata_host_intr (struct ata_port *ap, 
	case HSM_ST_LAST:

		if (unlikely(status & ATA_DRQ)) {

			/* handle DRQ=1 as error */

			qc->err_mask |= AC_ERR_ATA_BUS;

			ap->hsm_task_state = HSM_ST_ERR;

			goto fsm_start;

		}
@@ -4394,8 +4407,12 @@ inline unsigned int ata_host_intr (struct ata_port *ap, 
		printk(KERN_ERR "ata%u: command error, drv_stat 0x%x host_stat 0x%x\n",

		       ap->id, status, host_stat);



		/* make sure qc->err_mask is available to 

		 * know what's wrong and recover

		 */

		assert(qc->err_mask);



		ap->hsm_task_state = HSM_ST_IDLE;

		qc->err_mask |= __ac_err_mask(status);

		ata_qc_complete(qc);

		break;

	default: