From: Heikki Krogerus <heikki.krogerus@linux.intel.com>
To: Guenter Roeck <linux@roeck-us.net>
Cc: Hans de Goede <hdegoede@redhat.com>, linux-usb@vger.kernel.org
Subject: [PATCH v2 1/7] usb: typec: Copy everything from struct typec_capability during registration
Date: Fri, 4 Oct 2019 18:08:11 +0300 [thread overview]
Message-ID: <20191004150817.45413-2-heikki.krogerus@linux.intel.com> (raw)
In-Reply-To: <20191004150817.45413-1-heikki.krogerus@linux.intel.com>
Copying everything from struct typec_capability to struct
typec_port during port registration. This will make sure
that under no circumstances the driver can change the values
in the struct typec_capability that the port uses.
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
---
drivers/usb/typec/class.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
index 94a3eda62add..0bbf10c8ad58 100644
--- a/drivers/usb/typec/class.c
+++ b/drivers/usb/typec/class.c
@@ -52,6 +52,7 @@ struct typec_port {
struct typec_switch *sw;
struct typec_mux *mux;
+ const struct typec_capability *orig_cap; /* to be removed */
const struct typec_capability *cap;
};
@@ -968,7 +969,7 @@ preferred_role_store(struct device *dev, struct device_attribute *attr,
return -EINVAL;
}
- ret = port->cap->try_role(port->cap, role);
+ ret = port->cap->try_role(port->orig_cap, role);
if (ret)
return ret;
@@ -1014,7 +1015,7 @@ static ssize_t data_role_store(struct device *dev,
goto unlock_and_ret;
}
- ret = port->cap->dr_set(port->cap, ret);
+ ret = port->cap->dr_set(port->orig_cap, ret);
if (ret)
goto unlock_and_ret;
@@ -1071,7 +1072,7 @@ static ssize_t power_role_store(struct device *dev,
goto unlock_and_ret;
}
- ret = port->cap->pr_set(port->cap, ret);
+ ret = port->cap->pr_set(port->orig_cap, ret);
if (ret)
goto unlock_and_ret;
@@ -1119,7 +1120,7 @@ port_type_store(struct device *dev, struct device_attribute *attr,
goto unlock_and_ret;
}
- ret = port->cap->port_type_set(port->cap, type);
+ ret = port->cap->port_type_set(port->orig_cap, type);
if (ret)
goto unlock_and_ret;
@@ -1184,7 +1185,7 @@ static ssize_t vconn_source_store(struct device *dev,
if (ret)
return ret;
- ret = port->cap->vconn_set(port->cap, (enum typec_role)source);
+ ret = port->cap->vconn_set(port->orig_cap, (enum typec_role)source);
if (ret)
return ret;
@@ -1278,6 +1279,7 @@ static void typec_release(struct device *dev)
ida_destroy(&port->mode_ids);
typec_switch_put(port->sw);
typec_mux_put(port->mux);
+ kfree(port->cap);
kfree(port);
}
@@ -1579,9 +1581,10 @@ struct typec_port *typec_register_port(struct device *parent,
mutex_init(&port->port_type_lock);
port->id = id;
- port->cap = cap;
+ port->orig_cap = cap;
port->port_type = cap->type;
port->prefer_role = cap->prefer_role;
+ port->cap = kmemdup(cap, sizeof(*cap), GFP_KERNEL);
device_initialize(&port->dev);
port->dev.class = typec_class;
--
2.23.0
next prev parent reply other threads:[~2019-10-04 15:08 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-04 15:08 [PATCH v2 0/7] usb: typec: Small API improvement Heikki Krogerus
2019-10-04 15:08 ` Heikki Krogerus [this message]
2019-10-04 15:08 ` [PATCH v2 2/7] usb: typec: Introduce typec_get_drvdata() Heikki Krogerus
2019-10-04 15:08 ` [PATCH v2 3/7] usb: typec: Separate the operations vector Heikki Krogerus
2019-10-04 15:17 ` Heikki Krogerus
2019-10-05 17:36 ` Guenter Roeck
2019-10-07 8:44 ` Heikki Krogerus
2019-10-04 15:08 ` [PATCH v2 4/7] usb: typec: tcpm: Start using struct typec_operations Heikki Krogerus
2019-10-05 17:39 ` Guenter Roeck
2019-10-04 15:08 ` [PATCH v2 5/7] usb: typec: tps6598x: " Heikki Krogerus
2019-10-04 15:08 ` [PATCH v2 6/7] usb: typec: ucsi: " Heikki Krogerus
2019-10-04 15:08 ` [PATCH v2 7/7] usb: typec: Remove the callback members from struct typec_capability Heikki Krogerus
2019-10-05 17:37 ` Guenter Roeck
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