[PATCH - mdadm] Fix some issues found by clang

[NeilBrown <neilb@suse.com>]

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The clang compiler complained about each of these.

The mdmon.h error will only affect 'far' RAID10 arrays using intel or DDF
metadata, and there is no such thing.

The mdopen.c will cause a problem if there are no free md device
numbers in the first 512.  That is fairly unlikely.

The restripe.c error would only affect the 'test_stripe' command, and
probably doesn't change its behaviour.

The super-intel.c fix is purely cosmetic.

Signed-off-by: NeilBrown <neilb@suse.com>
---
 mdmon.h       | 2 +-
 mdopen.c      | 2 +-
 restripe.c    | 2 +-
 super-intel.c | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/mdmon.h b/mdmon.h
index aa750c6811e1..0b08c3d7da2a 100644
--- a/mdmon.h
+++ b/mdmon.h
@@ -101,7 +101,7 @@ static inline int is_resync_complete(struct mdinfo *array)
 		break;
 	case 10:
 		l = array->array.layout;
-		ncopies = (l & 0xff) * ((l >> 8) && 0xff);
+		ncopies = (l & 0xff) * ((l >> 8) & 0xff);
 		sync_size = array->component_size * array->array.raid_disks;
 		sync_size /= ncopies;
 		break;
diff --git a/mdopen.c b/mdopen.c
index f818fdf339eb..287b5211631a 100644
--- a/mdopen.c
+++ b/mdopen.c
@@ -318,7 +318,7 @@ int create_mddev(char *dev, char *name, int autof, int trustworthy,
 	else if (num < 0) {
 		/* need to choose a free number. */
 		char *_devnm = find_free_devnm(use_mdp);
-		if (devnm == NULL) {
+		if (_devnm == NULL) {
 			pr_err("No avail md devices - aborting\n");
 			return -1;
 		}
diff --git a/restripe.c b/restripe.c
index 56dca73ea86b..94342c7bc6f9 100644
--- a/restripe.c
+++ b/restripe.c
@@ -462,7 +462,7 @@ int raid6_check_disks(int data_disks, int start, int chunk_size,
 		}
 
 		if((Px == 0) && (Qx == 0))
-			curr_broken_disk = curr_broken_disk;
+			curr_broken_disk = prev_broken_disk;
 
 		if(curr_broken_disk >= data_disks + 2)
 			broken_status = 2;
diff --git a/super-intel.c b/super-intel.c
index 92817e9ec875..b24777ee3559 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -10141,7 +10141,7 @@ enum imsm_reshape_type imsm_analyze_change(struct supertype *st,
 				geo->size = max_size;
 		}
 
-		if ((direction == ROLLBACK_METADATA_CHANGES)) {
+		if (direction == ROLLBACK_METADATA_CHANGES) {
 			/* accept size for rollback only
 			*/
 		} else {
-- 
2.10.0


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