From: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>
Date: Wed, 21 Apr 2021 14:50:08 +0000 (+0200)
Subject: imsm: change wrong size verification
X-Git-Tag: mdadm-4.2-rc2~21
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ff904202a4a6232e0f0dfea31a7c4a34ab08f76e;p=thirdparty%2Fmdadm.git

imsm: change wrong size verification

Expectation that size is always rounded is incorrect.
Just confirm that size is smaller to be certain that update is safe.

Signed-off-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>
Signed-off-by: Jes Sorensen <jsorensen@fb.com>
---

diff --git a/super-intel.c b/super-intel.c
index 876e077c..be0313d5 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -11823,12 +11823,12 @@ static int imsm_fix_size_mismatch(struct supertype *st, int subarray_index)
 		if (calc_size == d_size || dev->vol.migr_type == MIGR_GEN_MIGR)
 			continue;
 
-		/* There is a difference, verify that imsm_dev_size is
-		 * rounded correctly and push update.
+		/* There is a difference, confirm that imsm_dev_size is
+		 * smaller and push update.
 		 */
-		if (d_size != round_size_to_mb(d_size, disc_count)) {
-			dprintf("imsm: Size of volume %d is not rounded correctly\n",
-				 i);
+		if (d_size > calc_size) {
+			pr_err("imsm: dev size of subarray %d is incorrect\n",
+				i);
 			goto exit;
 		}
 		memset(&geo, 0, sizeof(struct geo_params));