qmi_wwan: extend permitted QMAP mux_id value range

Permit mux_id values up to 254 to be used in qmimux_register_device()
for compatibility with ip(8) and the rmnet driver.

Fixes: c6adf77953bc ("net: usb: qmi_wwan: add qmap mux protocol support")
Cc: Daniele Palmas <dnlplm@gmail.com>
Signed-off-by: Reinhard Speyerer <rspmn@arcor.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/net/usb/qmi_wwan.c b/drivers/net/usb/qmi_wwan.c
index c6fbc2a2a785..780c10ee359b 100644
--- a/drivers/net/usb/qmi_wwan.c
+++ b/drivers/net/usb/qmi_wwan.c
@@ -429,8 +429,8 @@ static ssize_t add_mux_store(struct device *d,  struct device_attribute *attr, c
         if (kstrtou8(buf, 0, &mux_id))
                 return -EINVAL;
 
-        /* mux_id [1 - 0x7f] range empirically found */
-        if (mux_id < 1 || mux_id > 0x7f)
+        /* mux_id [1 - 254] for compatibility with ip(8) and the rmnet driver */
+        if (mux_id < 1 || mux_id > 254)
                 return -EINVAL;
 
         if (!rtnl_trylock())