diff --git a/block/blk-core.c b/block/blk-core.c
index a2e58ee..211041d 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1232,6 +1232,16 @@ static int __make_request(struct request_queue *q, struct bio *bio)
 	int el_ret, rw_flags, where = ELEVATOR_INSERT_SORT;
 	struct request *req;
 
+	if (test_bit(QUEUE_FLAG_DEBUG_DUMP, &q->queue_flags)) {
+		printk("XXX __make_request() on dead queue %s:%p\n",
+		       (bio->bi_bdev && bio->bi_bdev->bd_disk) ?
+		       bio->bi_bdev->bd_disk->disk_name : "????", q);
+		printk("XXX bi_rw=0x%lx bi_sector=%llu sectors=%llu\n",
+		       bio->bi_rw, (unsigned long long)bio->bi_sector,
+		       (unsigned long long)bio_sectors(bio));
+		dump_stack();
+	}
+
 	/*
 	 * low level driver can indicate that it wants pages above a
 	 * certain limit bounced to low memory (ie for highmem, or even
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index e2f57e9..45bff2f 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -1321,6 +1321,14 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
 
 		tf->command = ATA_CMD_VERIFY;	/* READ VERIFY */
 	} else {
+		struct scsi_device *sdev = qc->dev->sdev;
+
+		if (sdev && sdev->request_queue) {
+			printk("XXX marking queue %p dead\n", sdev->request_queue);
+			queue_flag_set_unlocked(QUEUE_FLAG_DEBUG_DUMP,
+						sdev->request_queue);
+		}
+
 		/* Some odd clown BIOSen issue spindown on power off (ACPI S4
 		 * or S5) causing some drives to spin up and down again.
 		 */
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 2ad95fa..de5e0a1 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -401,6 +401,7 @@ struct request_queue
 #define QUEUE_FLAG_NOXMERGES   15	/* No extended merges */
 #define QUEUE_FLAG_ADD_RANDOM  16	/* Contributes to random pool */
 #define QUEUE_FLAG_SECDISCARD  17	/* supports SECDISCARD */
+#define QUEUE_FLAG_DEBUG_DUMP  20
 
 #define QUEUE_FLAG_DEFAULT	((1 << QUEUE_FLAG_IO_STAT) |		\
 				 (1 << QUEUE_FLAG_STACKABLE)	|	\