From: raz ben yehuda <raziebe@gmail.com>
Date: Tue, 16 Jun 2009 07:01:22 +0000 (+1000)
Subject: md: raid10: chunk size check in run
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=964e7913b0d25b988e27a7cd9378bc55cc572bb4;p=mv-sheeva.git

md: raid10: chunk size check in run

have raid10 check chunk size in run method instead of in md

Signed-off-by: raziebe@gmail.com
Signed-off-by: NeilBrown <neilb@suse.de>
---

diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 9a5beb4fd95..06bef686f91 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -2050,9 +2050,10 @@ static int run(mddev_t *mddev)
 	int nc, fc, fo;
 	sector_t stride, size;
 
-	if (mddev->chunk_size < PAGE_SIZE) {
+	if (mddev->chunk_size < PAGE_SIZE ||
+	    !is_power_of_2(mddev->chunk_size)) {
 		printk(KERN_ERR "md/raid10: chunk size must be "
-		       "at least PAGE_SIZE(%ld).\n", PAGE_SIZE);
+		       "at least PAGE_SIZE(%ld) and be a power of 2.\n", PAGE_SIZE);
 		return -EINVAL;
 	}