X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=drivers%2Fmd%2Flinear.c;h=192741083196f25d7c75ab85bf2aaeb167a2e09d;hb=2d896c780db9cda5dc102bf7a0a2cd4394c1342e;hp=b99c19c7eb2237e6f6583530c849bcfcaa2887c2;hpb=da547d775fa9ba8d9dcaee7bc4e960540e2be576;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/md/linear.c b/drivers/md/linear.c
index b99c19c7eb2..19274108319 100644
--- a/drivers/md/linear.c
+++ b/drivers/md/linear.c
@@ -111,6 +111,19 @@ static int linear_issue_flush(request_queue_t *q, struct gendisk *disk,
 	return ret;
 }
 
+static int linear_congested(void *data, int bits)
+{
+	mddev_t *mddev = data;
+	linear_conf_t *conf = mddev_to_conf(mddev);
+	int i, ret = 0;
+
+	for (i = 0; i < mddev->raid_disks && !ret ; i++) {
+		request_queue_t *q = bdev_get_queue(conf->disks[i].rdev->bdev);
+		ret |= bdi_congested(&q->backing_dev_info, bits);
+	}
+	return ret;
+}
+
 static linear_conf_t *linear_conf(mddev_t *mddev, int raid_disks)
 {
 	linear_conf_t *conf;
@@ -126,8 +139,6 @@ static linear_conf_t *linear_conf(mddev_t *mddev, int raid_disks)
 	if (!conf)
 		return NULL;
 
-	mddev->private = conf;
-
 	cnt = 0;
 	conf->array_size = 0;
 
@@ -175,7 +186,7 @@ static linear_conf_t *linear_conf(mddev_t *mddev, int raid_disks)
 	for (i=0; i < cnt-1 ; i++) {
 		sector_t sz = 0;
 		int j;
-		for (j=i; i<cnt-1 && sz < min_spacing ; j++)
+		for (j = i; j < cnt - 1 && sz < min_spacing; j++)
 			sz += conf->disks[j].size;
 		if (sz >= min_spacing && sz < conf->hash_spacing)
 			conf->hash_spacing = sz;
@@ -219,7 +230,7 @@ static linear_conf_t *linear_conf(mddev_t *mddev, int raid_disks)
 	 * First calculate the device offsets.
 	 */
 	conf->disks[0].offset = 0;
-	for (i=1; i<mddev->raid_disks; i++)
+	for (i = 1; i < raid_disks; i++)
 		conf->disks[i].offset =
 			conf->disks[i-1].offset +
 			conf->disks[i-1].size;
@@ -231,7 +242,7 @@ static linear_conf_t *linear_conf(mddev_t *mddev, int raid_disks)
 	     curr_offset < conf->array_size;
 	     curr_offset += conf->hash_spacing) {
 
-		while (i < mddev->raid_disks-1 &&
+		while (i < raid_disks-1 &&
 		       curr_offset >= conf->disks[i+1].offset)
 			i++;
 
@@ -269,6 +280,8 @@ static int linear_run (mddev_t *mddev)
 	blk_queue_merge_bvec(mddev->queue, linear_mergeable_bvec);
 	mddev->queue->unplug_fn = linear_unplug;
 	mddev->queue->issue_flush_fn = linear_issue_flush;
+	mddev->queue->backing_dev_info.congested_fn = linear_congested;
+	mddev->queue->backing_dev_info.congested_data = mddev;
 	return 0;
 }
 
@@ -284,9 +297,11 @@ static int linear_add(mddev_t *mddev, mdk_rdev_t *rdev)
 	 */
 	linear_conf_t *newconf;
 
-	if (rdev->raid_disk != mddev->raid_disks)
+	if (rdev->saved_raid_disk != mddev->raid_disks)
 		return -EINVAL;
 
+	rdev->raid_disk = rdev->saved_raid_disk;
+
 	newconf = linear_conf(mddev,mddev->raid_disks+1);
 
 	if (!newconf)