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authorTomas Winkler <tomas.winkler@intel.com>2014-11-27 15:07:28 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-01-12 16:04:10 +0300
commit39db74ce1aa83626a0a70ed2abf29a17598fff49 (patch)
tree3e57345e0161df14173ed443d9a1110c09a8627f
parent787d61822525295399f97390bca3e1bb4ce7a6b3 (diff)
downloadlinux-39db74ce1aa83626a0a70ed2abf29a17598fff49.tar.xz
mei: bus: use ssize_t as the return type for send and receive
Mei bus receive and send function may return either number of transmitted bytes or errno. It is better to use ssize_t type for that purpose that mixing size_t with int. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/misc/mei/bus.c30
-rw-r--r--drivers/misc/mei/mei_dev.h6
-rw-r--r--include/linux/mei_cl_bus.h4
3 files changed, 19 insertions, 21 deletions
diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c
index b3a72bca5242..31164dd14bd0 100644
--- a/drivers/misc/mei/bus.c
+++ b/drivers/misc/mei/bus.c
@@ -224,13 +224,13 @@ void mei_cl_driver_unregister(struct mei_cl_driver *driver)
}
EXPORT_SYMBOL_GPL(mei_cl_driver_unregister);
-static int ___mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length,
+static ssize_t ___mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length,
bool blocking)
{
struct mei_device *dev;
struct mei_me_client *me_cl;
struct mei_cl_cb *cb;
- int rets;
+ ssize_t rets;
if (WARN_ON(!cl || !cl->dev))
return -ENODEV;
@@ -271,12 +271,12 @@ static int ___mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length,
return rets;
}
-int __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length)
+ssize_t __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length)
{
struct mei_device *dev;
struct mei_cl_cb *cb;
size_t r_length;
- int err;
+ ssize_t rets;
if (WARN_ON(!cl || !cl->dev))
return -ENODEV;
@@ -286,11 +286,9 @@ int __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length)
mutex_lock(&dev->device_lock);
if (!cl->read_cb) {
- err = mei_cl_read_start(cl, length);
- if (err < 0) {
- mutex_unlock(&dev->device_lock);
- return err;
- }
+ rets = mei_cl_read_start(cl, length);
+ if (rets < 0)
+ goto out;
}
if (cl->reading_state != MEI_READ_COMPLETE &&
@@ -313,13 +311,13 @@ int __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length)
cb = cl->read_cb;
if (cl->reading_state != MEI_READ_COMPLETE) {
- r_length = 0;
+ rets = 0;
goto out;
}
r_length = min_t(size_t, length, cb->buf_idx);
-
memcpy(buf, cb->response_buffer.data, r_length);
+ rets = r_length;
mei_io_cb_free(cb);
cl->reading_state = MEI_IDLE;
@@ -328,20 +326,20 @@ int __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length)
out:
mutex_unlock(&dev->device_lock);
- return r_length;
+ return rets;
}
-inline int __mei_cl_async_send(struct mei_cl *cl, u8 *buf, size_t length)
+inline ssize_t __mei_cl_async_send(struct mei_cl *cl, u8 *buf, size_t length)
{
return ___mei_cl_send(cl, buf, length, 0);
}
-inline int __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length)
+inline ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length)
{
return ___mei_cl_send(cl, buf, length, 1);
}
-int mei_cl_send(struct mei_cl_device *device, u8 *buf, size_t length)
+ssize_t mei_cl_send(struct mei_cl_device *device, u8 *buf, size_t length)
{
struct mei_cl *cl = device->cl;
@@ -355,7 +353,7 @@ int mei_cl_send(struct mei_cl_device *device, u8 *buf, size_t length)
}
EXPORT_SYMBOL_GPL(mei_cl_send);
-int mei_cl_recv(struct mei_cl_device *device, u8 *buf, size_t length)
+ssize_t mei_cl_recv(struct mei_cl_device *device, u8 *buf, size_t length)
{
struct mei_cl *cl = device->cl;
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 3dad74a8d496..7f350af2ee10 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -345,9 +345,9 @@ struct mei_cl_device *mei_cl_add_device(struct mei_device *dev,
struct mei_cl_ops *ops);
void mei_cl_remove_device(struct mei_cl_device *device);
-int __mei_cl_async_send(struct mei_cl *cl, u8 *buf, size_t length);
-int __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length);
-int __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length);
+ssize_t __mei_cl_async_send(struct mei_cl *cl, u8 *buf, size_t length);
+ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length);
+ssize_t __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length);
void mei_cl_bus_rx_event(struct mei_cl *cl);
void mei_cl_bus_remove_devices(struct mei_device *dev);
int mei_cl_bus_init(void);
diff --git a/include/linux/mei_cl_bus.h b/include/linux/mei_cl_bus.h
index 164aad1f9f12..0819d36a3a74 100644
--- a/include/linux/mei_cl_bus.h
+++ b/include/linux/mei_cl_bus.h
@@ -25,8 +25,8 @@ int __mei_cl_driver_register(struct mei_cl_driver *driver,
void mei_cl_driver_unregister(struct mei_cl_driver *driver);
-int mei_cl_send(struct mei_cl_device *device, u8 *buf, size_t length);
-int mei_cl_recv(struct mei_cl_device *device, u8 *buf, size_t length);
+ssize_t mei_cl_send(struct mei_cl_device *device, u8 *buf, size_t length);
+ssize_t mei_cl_recv(struct mei_cl_device *device, u8 *buf, size_t length);
typedef void (*mei_cl_event_cb_t)(struct mei_cl_device *device,
u32 events, void *context);