[patch 3/7] scsi: expose AN to user space

[Kristen Carlson Accardi]

Get media change notification capability from disk and pass this information
to genhd by setting appropriate flag.

Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@xxxxxxxxx>

Index: 2.6-git/drivers/scsi/sr.c
===================================================================
--- 2.6-git.orig/drivers/scsi/sr.c
+++ 2.6-git/drivers/scsi/sr.c
@@ -603,6 +603,8 @@ static int sr_probe(struct device *dev)
 
 	dev_set_drvdata(dev, cd);
 	disk->flags |= GENHD_FL_REMOVABLE;
+	if (sdev->media_change_notify)
+		disk->flags |= GENHD_FL_MEDIA_CHANGE_NOTIFY;
 	add_disk(disk);
 
 	sdev_printk(KERN_DEBUG, sdev,
Index: 2.6-git/include/scsi/scsi_device.h
===================================================================
--- 2.6-git.orig/include/scsi/scsi_device.h
+++ 2.6-git/include/scsi/scsi_device.h
@@ -126,7 +126,7 @@ struct scsi_device {
 	unsigned fix_capacity:1;	/* READ_CAPACITY is too high by 1 */
 	unsigned guess_capacity:1;	/* READ_CAPACITY might be too high by 1 */
 	unsigned retry_hwerror:1;	/* Retry HARDWARE_ERROR */
-
+	unsigned media_change_notify:1; /* dev supports async media notify */
 	unsigned int device_blocked;	/* Device returned QUEUE_FULL. */
 
 	unsigned int max_device_blocked; /* what device_blocked counts down from  */
Index: 2.6-git/drivers/scsi/sd.c
===================================================================
--- 2.6-git.orig/drivers/scsi/sd.c
+++ 2.6-git/drivers/scsi/sd.c
@@ -1668,6 +1668,9 @@ static int sd_probe(struct device *dev)
 	if (sdp->removable)
 		gd->flags |= GENHD_FL_REMOVABLE;
 
+	if (sdp->media_change_notify)
+		gd->flags |= GENHD_FL_MEDIA_CHANGE_NOTIFY;
+
 	dev_set_drvdata(dev, sdkp);
 	add_disk(gd);
 

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