From a0e1020523ecaeb6ee5e39d90bf1f6df33e47292 Mon Sep 17 00:00:00 2001
From: Thomas Quinot <thomas@FreeBSD.org>
Date: Wed, 11 Feb 2004 10:14:08 +0000
Subject: [PATCH] (atapi_cb): Reenable automatic retrieve of sense data on
 error, making  it asynchronous to avoid incorrect use of ata_atapicmd within
 an  ATAPI callback.

Tested by:	harti
---
 sys/dev/ata/atapi-cam.c | 35 +++++++++++++++++++++--------------
 1 file changed, 21 insertions(+), 14 deletions(-)

diff --git a/sys/dev/ata/atapi-cam.c b/sys/dev/ata/atapi-cam.c
index bad223835601..7fb897ed0c12 100644
--- a/sys/dev/ata/atapi-cam.c
+++ b/sys/dev/ata/atapi-cam.c
@@ -62,7 +62,7 @@ struct atapi_hcb {
     union ccb		*ccb;
     int			flags;
 #define QUEUED		0x0001
-
+#define AUTOSENSE       0x0002
     char		*dxfer_alloc;
     TAILQ_ENTRY(atapi_hcb) chain;
 };
@@ -569,26 +569,33 @@ atapi_cb(struct ata_request *request)
     }
 #endif
 
-    if (request->result != 0) {
+    if ((hcb->flags & AUTOSENSE) != 0) {
+	rc = CAM_SCSI_STATUS_ERROR;
+	if (request->result == 0) {
+	    csio->ccb_h.status |= CAM_AUTOSNS_VALID;
+	}
+    } else if (request->result != 0) {
 	rc = CAM_SCSI_STATUS_ERROR;
 	csio->scsi_status = SCSI_STATUS_CHECK_COND;
-#if 0
-	/*
-         * XXX Temporarily disable autosense, as this seems to cause
-	 * a missed ATA interrupt.
-	 */
+
 	if ((csio->ccb_h.flags & CAM_DIS_AUTOSENSE) == 0) {
-	    int8_t ccb[16] = { ATAPI_REQUEST_SENSE, 0, 0, 0,
+	    static const int8_t ccb[16] = { ATAPI_REQUEST_SENSE, 0, 0, 0,
 		sizeof(struct atapi_sense), 0, 0, 0, 0, 0, 0,
 		0, 0, 0, 0, 0 };
 
-	    if (ata_atapicmd(request->device, ccb, (caddr_t)&csio->sense_data,
-		sizeof(struct atapi_sense), ATA_R_READ, 30) == 0)
-	    {
-		csio->ccb_h.status |= CAM_AUTOSNS_VALID;
-	    }
+	    bcopy (ccb, request->u.atapi.ccb, sizeof ccb);
+	    request->data = (caddr_t)&csio->sense_data;
+	    request->bytecount = sizeof(struct atapi_sense);
+	    request->transfersize = min(request->bytecount, 65534);
+	    request->timeout = csio->ccb_h.timeout;
+	    request->retries = 2;
+	    request->flags = ATA_R_QUIET|ATA_R_ATAPI|ATA_R_IMMEDIATE;
+	    hcb->flags |= AUTOSENSE;
+
+	    mtx_unlock (&Giant);
+	    ata_queue_request(request);
+	    return;
 	}
-#endif
     } else {
 	rc = CAM_REQ_CMP;
 	csio->scsi_status = SCSI_STATUS_OK;