md/raid10: fix wrong setting of max_corr_read_errors

hulk inclusion
category: bugfix
bugzilla: 188290, https://gitee.com/openeuler/kernel/issues/I6ECBD
CVE: NA

--------------------------------

max_corr_read_errors should not be negative number. Change it to
unsigned int where use it.
Signed-off-by: NLi Nan <linan122@huawei.com>
Reviewed-by: NHou Tao <houtao1@huawei.com>
Signed-off-by: NJialin Zhang <zhangjialin11@huawei.com>

drivers/md/md.c

@@ -4563,7 +4563,7 @@ __ATTR_PREALLOC(array_state, S_IRUGO|S_IWUSR, array_state_show, array_state_stor
 
 static ssize_t
 max_corrected_read_errors_show(struct mddev *mddev, char *page) {
-	return sprintf(page, "%d\n",
+	return sprintf(page, "%u\n",
 		       atomic_read(&mddev->max_corr_read_errors));
 }
 

drivers/md/raid10.c

@@ -2325,7 +2325,7 @@ static void fix_read_error(struct r10conf *conf, struct mddev *mddev, struct r10
 	int sect = 0; /* Offset from r10_bio->sector */
 	int sectors = r10_bio->sectors;
 	struct md_rdev *rdev;
-	int max_read_errors = atomic_read(&mddev->max_corr_read_errors);
+	unsigned int max_read_errors = atomic_read(&mddev->max_corr_read_errors);
 	int d = r10_bio->devs[r10_bio->read_slot].devnum;
 
 	/* still own a reference to this rdev, so it cannot
@@ -2344,7 +2344,7 @@ static void fix_read_error(struct r10conf *conf, struct mddev *mddev, struct r10
 		char b[BDEVNAME_SIZE];
 		bdevname(rdev->bdev, b);
 
-		pr_notice("md/raid10:%s: %s: Raid device exceeded read_error threshold [cur %d:max %d]\n",
+		pr_notice("md/raid10:%s: %s: Raid device exceeded read_error threshold [cur %u:max %u]\n",
 			  mdname(mddev), b,
 			  atomic_read(&rdev->read_errors), max_read_errors);
 		pr_notice("md/raid10:%s: %s: Failing raid device\n",