1 files changed, 60 insertions, 0 deletions
diff --git a/target/linux/oxnas/patches-3.14/999-libata-hacks.patch b/target/linux/oxnas/patches-3.14/999-libata-hacks.patch
new file mode 100644
index 0000000000..39d9e51cf0
--- /dev/null
+++ b/target/linux/oxnas/patches-3.14/999-libata-hacks.patch
@@ -0,0 +1,60 @@
+Index: linux-3.18-rc7/drivers/ata/libata-core.c
+===================================================================
+--- linux-3.18-rc7.orig/drivers/ata/libata-core.c
++++ linux-3.18-rc7/drivers/ata/libata-core.c
+@@ -1568,6 +1568,14 @@ unsigned ata_exec_internal_sg(struct ata
+ 		return AC_ERR_SYSTEM;
+ 	}
+ 
++	if (ap->ops->acquire_hw && !ap->ops->acquire_hw(ap->port_no, 0, 0)) {
++		spin_unlock_irqrestore(ap->lock, flags);
++		if (!ap->ops->acquire_hw(ap->port_no, 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
+@@ -4739,6 +4747,9 @@ 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++) {
+ 		tag = tag < max_queue ? tag : 0;
+ 
+@@ -4805,6 +4816,8 @@ 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);
+ 	}
+ }
+ 
+Index: linux-3.18-rc7/include/linux/libata.h
+===================================================================
+--- linux-3.18-rc7.orig/include/linux/libata.h
++++ linux-3.18-rc7/include/linux/libata.h
+@@ -884,6 +884,8 @@ 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
+@@ -974,6 +976,8 @@ struct ata_port_operations {
+ 	void (*phy_reset)(struct ata_port *ap);
+ 	void (*eng_timeout)(struct ata_port *ap);
+ 
++	int (*acquire_hw)(int port_no, int may_sleep, int timeout_jiffies);
++
+ 	/*
+ 	 * ->inherits must be the last field and all the preceding
+ 	 * fields must be pointers.