[libata] change ata_qc_complete() to take error mask as second arg
The second argument to ata_qc_complete() was being used for two
purposes: communicate the ATA Status register to the completion
function, and indicate an error. On legacy PCI IDE hardware, the latter
is often implicit in the former. On more modern hardware, the driver
often completely emulated a Status register value, passing ATA_ERR as an
indication that something went wrong.
Now that previous code changes have eliminated the need to use drv_stat
arg to communicate the ATA Status register value, we can convert it to a
mask of possible error classes.
This will lead to more flexible error handling in the future.
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 771bc7d..cc089f1 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -2663,7 +2663,7 @@
* None. (grabs host lock)
*/
-void ata_poll_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat)
+void ata_poll_qc_complete(struct ata_queued_cmd *qc, unsigned int err_mask)
{
struct ata_port *ap = qc->ap;
unsigned long flags;
@@ -2671,7 +2671,7 @@
spin_lock_irqsave(&ap->host_set->lock, flags);
ap->flags &= ~ATA_FLAG_NOINTR;
ata_irq_on(ap);
- ata_qc_complete(qc, drv_stat);
+ ata_qc_complete(qc, err_mask);
spin_unlock_irqrestore(&ap->host_set->lock, flags);
}
@@ -2768,7 +2768,7 @@
ap->hsm_task_state = HSM_ST_IDLE;
- ata_poll_qc_complete(qc, drv_stat);
+ ata_poll_qc_complete(qc, 0);
/* another command may start at this point */
@@ -3136,18 +3136,15 @@
static void ata_pio_error(struct ata_port *ap)
{
struct ata_queued_cmd *qc;
- u8 drv_stat;
+
+ printk(KERN_WARNING "ata%u: PIO error\n", ap->id);
qc = ata_qc_from_tag(ap, ap->active_tag);
assert(qc != NULL);
- drv_stat = ata_chk_status(ap);
- printk(KERN_WARNING "ata%u: PIO error, drv_stat 0x%x\n",
- ap->id, drv_stat);
-
ap->hsm_task_state = HSM_ST_IDLE;
- ata_poll_qc_complete(qc, drv_stat | ATA_ERR);
+ ata_poll_qc_complete(qc, AC_ERR_ATA_BUS);
}
static void ata_pio_task(void *_data)
@@ -3270,7 +3267,7 @@
ap->id, qc->tf.command, drv_stat, host_stat);
/* complete taskfile transaction */
- ata_qc_complete(qc, drv_stat);
+ ata_qc_complete(qc, ac_err_mask(drv_stat));
break;
}
@@ -3375,7 +3372,7 @@
return qc;
}
-int ata_qc_complete_noop(struct ata_queued_cmd *qc, u8 drv_stat)
+int ata_qc_complete_noop(struct ata_queued_cmd *qc, unsigned int err_mask)
{
return 0;
}
@@ -3434,7 +3431,7 @@
* spin_lock_irqsave(host_set lock)
*/
-void ata_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat)
+void ata_qc_complete(struct ata_queued_cmd *qc, unsigned int err_mask)
{
int rc;
@@ -3451,7 +3448,7 @@
qc->flags &= ~ATA_QCFLAG_ACTIVE;
/* call completion callback */
- rc = qc->complete_fn(qc, drv_stat);
+ rc = qc->complete_fn(qc, err_mask);
/* if callback indicates not to complete command (non-zero),
* return immediately
@@ -3889,7 +3886,7 @@
ap->ops->irq_clear(ap);
/* complete taskfile transaction */
- ata_qc_complete(qc, status);
+ ata_qc_complete(qc, ac_err_mask(status));
break;
default:
@@ -3984,7 +3981,7 @@
/* sleep-wait for BSY to clear */
DPRINTK("busy wait\n");
if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB))
- goto err_out;
+ goto err_out_status;
/* make sure DRQ is set */
status = ata_chk_status(ap);
@@ -4021,8 +4018,10 @@
return;
+err_out_status:
+ status = ata_chk_status(ap);
err_out:
- ata_poll_qc_complete(qc, ATA_ERR);
+ ata_poll_qc_complete(qc, __ac_err_mask(status));
}