Subject: [PATCH 006/009]: raid1: chunk size check in run

[raz ben yehuda <raziebe@gmail.com>]

have raid1 check chunk size in run method instead of in md
 raid1.c |    9 +++++++++
 1 file changed, 9 insertions(+)
Signed-off-by: raziebe@gmail.com
---
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 2c8d9e6..8609506 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1942,6 +1942,15 @@ static int run(mddev_t *mddev)
 		       mdname(mddev), mddev->level);
 		goto out;
 	}
+	/*
+	 * chunk-size has to be a power of 2
+	 */
+	if ((1 << ffz(~mddev->chunk_size)) != mddev->chunk_size) {
+		printk(KERN_ERR "%s chunk_size of %d not valid\n",
+			mdname(mddev),
+			mddev->chunk_size);
+		return -EINVAL;
+	}
 	if (mddev->reshape_position != MaxSector) {
 		printk("raid1: %s: reshape_position set but not supported\n",
 		       mdname(mddev));