dm integrity: fix gcc 5 warning

This commit fixes gcc 5 warning "logical not is only applied to the left
hand side of comparison"
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Fixes: fb098768 ("dm-integrity: introduce the Inline mode")
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>

drivers/md/dm-integrity.c

@@ -4715,14 +4715,19 @@ static int dm_integrity_ctr(struct dm_target *ti, unsigned int argc, char **argv
 		ti->error = "Block size doesn't match the information in superblock";
 		goto bad;
 	}
-	if (!le32_to_cpu(ic->sb->journal_sections) != (ic->mode == 'I')) {
+	if (ic->mode != 'I') {
+		if (!le32_to_cpu(ic->sb->journal_sections)) {
 			r = -EINVAL;
-		if (ic->mode != 'I')
 			ti->error = "Corrupted superblock, journal_sections is 0";
-		else
+			goto bad;
+		}
+	} else {
+		if (le32_to_cpu(ic->sb->journal_sections)) {
+			r = -EINVAL;
 			ti->error = "Corrupted superblock, journal_sections is not 0";
 			goto bad;
 		}
+	}
 	/* make sure that ti->max_io_len doesn't overflow */
 	if (!ic->meta_dev) {
 		if (ic->sb->log2_interleave_sectors < MIN_LOG2_INTERLEAVE_SECTORS ||