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usb: typec: tcpm: usb: typec: tcpm: Fix a signedness bug in tcpm_fw_get_caps() 

The "port->typec_caps.data" and "port->typec_caps.type" variables are
enums and in this context GCC will treat them as an unsigned int so they
can never be less than zero.

Fixes: ae8a2ca8a2 ("usb: typec: Group all TCPCI/TCPM code together")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable <stable@vger.kernel.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20191001120117.GA23528@mwanda
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Carpenter 2019-10-01 15:01:17 +03:00 committed by Greg Kroah-Hartman
parent 2636d49b64
commit 7101949f36
1 changed files with 8 additions and 6 deletions
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14
drivers/usb/typec/tcpm/tcpm.c
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@ -4409,18 +4409,20 @@ static int tcpm_fw_get_caps(struct tcpm_port *port,
/* USB data support is optional */
ret = fwnode_property_read_string(fwnode, "data-role", &cap_str);
if (ret == 0) {
port->typec_caps.data = typec_find_port_data_role(cap_str);
if (port->typec_caps.data < 0)
return -EINVAL;
ret = typec_find_port_data_role(cap_str);
if (ret < 0)
return ret;
port->typec_caps.data = ret;
}
ret = fwnode_property_read_string(fwnode, "power-role", &cap_str);
if (ret < 0)
return ret;
port->typec_caps.type = typec_find_port_power_role(cap_str);
if (port->typec_caps.type < 0)
return -EINVAL;
ret = typec_find_port_power_role(cap_str);
if (ret < 0)
return ret;
port->typec_caps.type = ret;
port->port_type = port->typec_caps.type;
if (port->port_type == TYPEC_PORT_SNK)