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- --- a/drivers/ata/libata-core.c
- +++ b/drivers/ata/libata-core.c
- @@ -1581,6 +1581,14 @@ unsigned ata_exec_internal_sg(struct ata
- return AC_ERR_SYSTEM;
- }
-
- + if (ap->ops->acquire_hw && !ap->ops->acquire_hw(ap, 0, 0)) {
- + spin_unlock_irqrestore(ap->lock, flags);
- + if (!ap->ops->acquire_hw(ap, 1, (2*HZ))) {
- + return AC_ERR_TIMEOUT;
- + }
- + spin_lock_irqsave(ap->lock, flags);
- + }
- +
- /* initialize internal qc */
-
- /* XXX: Tag 0 is used for drivers with legacy EH as some
- @@ -4796,6 +4804,9 @@ static struct ata_queued_cmd *ata_qc_new
- if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
- return NULL;
-
- + if (ap->ops->qc_new && ap->ops->qc_new(ap))
- + return NULL;
- +
- for (i = 0, tag = ap->last_tag + 1; i < max_queue; i++, tag++) {
- if (ap->flags & ATA_FLAG_LOWTAG)
- tag = i;
- @@ -4868,6 +4879,8 @@ void ata_qc_free(struct ata_queued_cmd *
- if (likely(ata_tag_valid(tag))) {
- qc->tag = ATA_TAG_POISON;
- clear_bit(tag, &ap->qc_allocated);
- + if (ap->ops->qc_free)
- + ap->ops->qc_free(qc);
- }
- }
-
- --- a/include/linux/libata.h
- +++ b/include/linux/libata.h
- @@ -903,6 +903,8 @@ struct ata_port_operations {
- void (*qc_prep)(struct ata_queued_cmd *qc);
- unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
- bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
- + int (*qc_new)(struct ata_port *ap);
- + void (*qc_free)(struct ata_queued_cmd *qc);
-
- /*
- * Configuration and exception handling
- @@ -993,6 +995,9 @@ struct ata_port_operations {
- void (*phy_reset)(struct ata_port *ap);
- void (*eng_timeout)(struct ata_port *ap);
-
- + int (*acquire_hw)(struct ata_port *ap, int may_sleep,
- + int timeout_jiffies);
- +
- /*
- * ->inherits must be the last field and all the preceding
- * fields must be pointers.
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