diff --git a/drivers/scsi/libata-eh.c b/drivers/scsi/libata-eh.c
index 71ad18b7cff6e3eda05b50d586dd976dc57edef5..1968f2d140f358247cc66ac877bab426f179307b 100644
--- a/drivers/scsi/libata-eh.c
+++ b/drivers/scsi/libata-eh.c
@@ -229,9 +229,15 @@ void ata_scsi_error(struct Scsi_Host *host)
  repeat:
 	/* invoke error handler */
 	if (ap->ops->error_handler) {
-		/* clear EH pending */
+		/* fetch & clear EH info */
 		spin_lock_irqsave(hs_lock, flags);
+
+		memset(&ap->eh_context, 0, sizeof(ap->eh_context));
+		ap->eh_context.i = ap->eh_info;
+		memset(&ap->eh_info, 0, sizeof(ap->eh_info));
+
 		ap->flags &= ~ATA_FLAG_EH_PENDING;
+
 		spin_unlock_irqrestore(hs_lock, flags);
 
 		/* invoke EH */
@@ -255,6 +261,9 @@ void ata_scsi_error(struct Scsi_Host *host)
 					"tries, giving up\n", ATA_EH_MAX_REPEAT);
 		}
 
+		/* this run is complete, make sure EH info is clear */
+		memset(&ap->eh_info, 0, sizeof(ap->eh_info));
+
 		/* Clear host_eh_scheduled while holding hs_lock such
 		 * that if exception occurs after this point but
 		 * before EH completion, SCSI midlayer will
diff --git a/include/linux/libata.h b/include/linux/libata.h
index f5cea13599c339cdbb43a13ba3585778f6cab00f..298f9918e37528fab69b8cdce8eb65e0974c8835 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -229,6 +229,9 @@ enum {
 	/* ering size */
 	ATA_ERING_SIZE		= 32,
 
+	/* desc_len for ata_eh_info and context */
+	ATA_EH_DESC_LEN		= 80,
+
 	/* reset / recovery action types */
 	ATA_EH_REVALIDATE	= (1 << 0),
 	ATA_EH_SOFTRESET	= (1 << 1),
@@ -236,6 +239,9 @@ enum {
 
 	ATA_EH_RESET_MASK	= ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
 
+	/* ata_eh_info->flags */
+	ATA_EHI_DID_RESET	= (1 << 0), /* already reset this port */
+
 	/* max repeat if error condition is still set after ->error_handler */
 	ATA_EH_MAX_REPEAT	= 5,
 
@@ -420,6 +426,21 @@ struct ata_device {
 	struct ata_ering	ering;
 };
 
+struct ata_eh_info {
+	struct ata_device	*dev;		/* offending device */
+	u32			serror;		/* SError from LLDD */
+	unsigned int		err_mask;	/* port-wide err_mask */
+	unsigned int		action;		/* ATA_EH_* action mask */
+	unsigned int		flags;		/* ATA_EHI_* flags */
+	char			desc[ATA_EH_DESC_LEN];
+	int			desc_len;
+};
+
+struct ata_eh_context {
+	struct ata_eh_info	i;
+	int			tries[ATA_MAX_DEVICES];
+};
+
 struct ata_port {
 	struct Scsi_Host	*host;	/* our co-allocated scsi host */
 	const struct ata_port_operations *ops;
@@ -444,6 +465,11 @@ struct ata_port {
 	unsigned int		cbl;	/* cable type; ATA_CBL_xxx */
 	unsigned int		sata_spd_limit;	/* SATA PHY speed limit */
 
+	/* record runtime error info, protected by host_set lock */
+	struct ata_eh_info	eh_info;
+	/* EH context owned by EH */
+	struct ata_eh_context	eh_context;
+
 	struct ata_device	device[ATA_MAX_DEVICES];
 
 	struct ata_queued_cmd	qcmd[ATA_MAX_QUEUE];
@@ -710,6 +736,20 @@ extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
 #define ata_dev_printk(dev, lv, fmt, args...) \
 	printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args)
 
+/*
+ * ata_eh_info helpers
+ */
+#define ata_ehi_push_desc(ehi, fmt, args...) do { \
+	(ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
+				     ATA_EH_DESC_LEN - (ehi)->desc_len, \
+				     fmt , ##args); \
+} while (0)
+
+#define ata_ehi_clear_desc(ehi) do { \
+	(ehi)->desc[0] = '\0'; \
+	(ehi)->desc_len = 0; \
+} while (0)
+
 /*
  * qc helpers
  */