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mei: drop reserved host client ids

Browse source 
The reserved host clients can be obsoleted now, a portion of the
platforms is shipped without iAMT enabled, where the reservation is not
relevant and for platforms with iAMT dynamic allocation is sufficient.
Dropping reserved ids makes enumeration more flexible and generic

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Usyskin 2016-02-07 23:35:40 +02:00 committed by Greg Kroah-Hartman
parent 6938c1923f
commit 7851e00870
7 changed files with 11 additions and 24 deletions
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2
drivers/misc/mei/amthif.c
View file

@ -71,7 +71,7 @@ int mei_amthif_host_init(struct mei_device *dev, struct mei_me_client *me_cl)
mei_cl_init(cl, dev);
ret = mei_cl_link(cl, MEI_IAMTHIF_HOST_CLIENT_ID);
ret = mei_cl_link(cl);
if (ret < 0) {
dev_err(dev->dev, "amthif: failed cl_link %d\n", ret);
return ret;

2
drivers/misc/mei/bus-fixup.c
View file

@ -239,7 +239,7 @@ static void mei_nfc(struct mei_cl_device *cldev)
mutex_lock(&bus->device_lock);
/* we need to connect to INFO GUID */
cl = mei_cl_alloc_linked(bus, MEI_HOST_CLIENT_ID_ANY);
cl = mei_cl_alloc_linked(bus);
if (IS_ERR(cl)) {
ret = PTR_ERR(cl);
cl = NULL;

2
drivers/misc/mei/bus.c
View file

@ -417,7 +417,7 @@ int mei_cldev_enable(struct mei_cl_device *cldev)
if (!cl) {
mutex_lock(&bus->device_lock);
cl = mei_cl_alloc_linked(bus, MEI_HOST_CLIENT_ID_ANY);
cl = mei_cl_alloc_linked(bus);
mutex_unlock(&bus->device_lock);
if (IS_ERR(cl))
return PTR_ERR(cl);

15
drivers/misc/mei/client.c
View file

@ -587,27 +587,23 @@ struct mei_cl *mei_cl_allocate(struct mei_device *dev)
* mei_cl_link - allocate host id in the host map
*
* @cl: host client
* @id: fixed host id or MEI_HOST_CLIENT_ID_ANY (-1) for generic one
*
* Return: 0 on success
* -EINVAL on incorrect values
* -EMFILE if open count exceeded.
*/
int mei_cl_link(struct mei_cl *cl, int id)
int mei_cl_link(struct mei_cl *cl)
{
struct mei_device *dev;
long open_handle_count;
int id;
if (WARN_ON(!cl || !cl->dev))
return -EINVAL;
dev = cl->dev;
/* If Id is not assigned get one*/
if (id == MEI_HOST_CLIENT_ID_ANY)
id = find_first_zero_bit(dev->host_clients_map,
MEI_CLIENTS_MAX);
id = find_first_zero_bit(dev->host_clients_map, MEI_CLIENTS_MAX);
if (id >= MEI_CLIENTS_MAX) {
dev_err(dev->dev, "id exceeded %d", MEI_CLIENTS_MAX);
return -EMFILE;
@ -1143,11 +1139,10 @@ int mei_cl_connect(struct mei_cl *cl, struct mei_me_client *me_cl,
* mei_cl_alloc_linked - allocate and link host client
*
* @dev: the device structure
* @id: fixed host id or MEI_HOST_CLIENT_ID_ANY (-1) for generic one
*
* Return: cl on success ERR_PTR on failure
*/
struct mei_cl *mei_cl_alloc_linked(struct mei_device *dev, int id)
struct mei_cl *mei_cl_alloc_linked(struct mei_device *dev)
{
struct mei_cl *cl;
int ret;
@ -1158,7 +1153,7 @@ struct mei_cl *mei_cl_alloc_linked(struct mei_device *dev, int id)
goto err;
}
ret = mei_cl_link(cl, id);
ret = mei_cl_link(cl);
if (ret)
goto err;

4
drivers/misc/mei/client.h
View file

@ -107,10 +107,10 @@ struct mei_cl *mei_cl_allocate(struct mei_device *dev);
void mei_cl_init(struct mei_cl *cl, struct mei_device *dev);
int mei_cl_link(struct mei_cl *cl, int id);
int mei_cl_link(struct mei_cl *cl);
int mei_cl_unlink(struct mei_cl *cl);
struct mei_cl *mei_cl_alloc_linked(struct mei_device *dev, int id);
struct mei_cl *mei_cl_alloc_linked(struct mei_device *dev);
struct mei_cl_cb *mei_cl_read_cb(const struct mei_cl *cl,
const struct file *fp);

2
drivers/misc/mei/main.c
View file

@ -65,7 +65,7 @@ static int mei_open(struct inode *inode, struct file *file)
goto err_unlock;
}
cl = mei_cl_alloc_linked(dev, MEI_HOST_CLIENT_ID_ANY);
cl = mei_cl_alloc_linked(dev);
if (IS_ERR(cl)) {
err = PTR_ERR(cl);
goto err_unlock;

8
drivers/misc/mei/mei_dev.h
View file

@ -53,14 +53,6 @@ extern const uuid_le mei_amthif_guid;
*/
#define MEI_MAX_OPEN_HANDLE_COUNT (MEI_CLIENTS_MAX - 1)
/*
* Internal Clients Number
*/
#define MEI_HOST_CLIENT_ID_ANY (-1)
#define MEI_HBM_HOST_CLIENT_ID 0 /* not used, just for documentation */
#define MEI_IAMTHIF_HOST_CLIENT_ID 2
/* File state */
enum file_state {
MEI_FILE_INITIALIZING = 0,