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57 lines
1.7 KiB
57 lines
1.7 KiB
--- a/drivers/ata/libata-core.c
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+++ b/drivers/ata/libata-core.c
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@@ -1581,6 +1581,14 @@ unsigned ata_exec_internal_sg(struct ata
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return AC_ERR_SYSTEM;
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}
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+ if (ap->ops->acquire_hw && !ap->ops->acquire_hw(ap, 0, 0)) {
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+ spin_unlock_irqrestore(ap->lock, flags);
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+ if (!ap->ops->acquire_hw(ap, 1, (2*HZ))) {
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+ return AC_ERR_TIMEOUT;
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+ }
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+ spin_lock_irqsave(ap->lock, flags);
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+ }
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+
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/* initialize internal qc */
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/* XXX: Tag 0 is used for drivers with legacy EH as some
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@@ -4752,6 +4760,9 @@ static struct ata_queued_cmd *ata_qc_new
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if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
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return NULL;
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+ if (ap->ops->qc_new && ap->ops->qc_new(ap))
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+ return NULL;
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+
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for (i = 0, tag = ap->last_tag + 1; i < max_queue; i++, tag++) {
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if (ap->flags & ATA_FLAG_LOWTAG)
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tag = i;
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@@ -4824,6 +4835,8 @@ void ata_qc_free(struct ata_queued_cmd *
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if (likely(ata_tag_valid(tag))) {
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qc->tag = ATA_TAG_POISON;
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clear_bit(tag, &ap->qc_allocated);
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+ if (ap->ops->qc_free)
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+ ap->ops->qc_free(qc);
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}
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}
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--- a/include/linux/libata.h
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+++ b/include/linux/libata.h
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@@ -891,6 +891,8 @@ struct ata_port_operations {
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void (*qc_prep)(struct ata_queued_cmd *qc);
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unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
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bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
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+ int (*qc_new)(struct ata_port *ap);
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+ void (*qc_free)(struct ata_queued_cmd *qc);
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/*
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* Configuration and exception handling
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@@ -981,6 +983,9 @@ struct ata_port_operations {
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void (*phy_reset)(struct ata_port *ap);
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void (*eng_timeout)(struct ata_port *ap);
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+ int (*acquire_hw)(struct ata_port *ap, int may_sleep,
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+ int timeout_jiffies);
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+
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/*
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* ->inherits must be the last field and all the preceding
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* fields must be pointers.
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