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60 lines
2.0 KiB
60 lines
2.0 KiB
Index: linux-3.18-rc7/drivers/ata/libata-core.c
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===================================================================
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--- linux-3.18-rc7.orig/drivers/ata/libata-core.c
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+++ linux-3.18-rc7/drivers/ata/libata-core.c
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@@ -1568,6 +1568,14 @@ 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->port_no, 0, 0)) {
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+ spin_unlock_irqrestore(ap->lock, flags);
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+ if (!ap->ops->acquire_hw(ap->port_no, 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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@@ -4739,6 +4747,9 @@ 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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tag = tag < max_queue ? tag : 0;
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@@ -4805,6 +4816,8 @@ 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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Index: linux-3.18-rc7/include/linux/libata.h
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===================================================================
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--- linux-3.18-rc7.orig/include/linux/libata.h
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+++ linux-3.18-rc7/include/linux/libata.h
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@@ -884,6 +884,8 @@ 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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@@ -974,6 +976,8 @@ 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)(int port_no, int may_sleep, 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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