[PATCH] platform/x86: huawei-wmi: make validation stricter in huawei_wmi_battery_set()

[Dan Carpenter]

I don't think it makes sense for "end" to be negative or for even for it
to be less than "start".  That also means that "start" can't be more
than 100 which is good.

Fixes: b7527d0f4502 ("platform/x86: huawei-wmi: Add battery charging 
thresholds")
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>
---
 drivers/platform/x86/huawei-wmi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/x86/huawei-wmi.c 
b/drivers/platform/x86/huawei-wmi.c
index 6720f78c60c2..02a505a72172 100644
--- a/drivers/platform/x86/huawei-wmi.c
+++ b/drivers/platform/x86/huawei-wmi.c
@@ -343,7 +343,7 @@ static int huawei_wmi_battery_set(int start, int end)
        union hwmi_arg arg;
        int err;
 
-       if (start < 0 || end > 100)
+       if (start < 0 || end < start || end > 100)
                return -EINVAL;
 
        arg.cmd = BATTERY_THRESH_SET;
-- 
2.20.1