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Date: Thu, 21 Aug 2014 08:32:52 -0400
From: Josh Boyer <jwboyer@...oraproject.org>
To: Tomas Winkler <tomas.winkler@...el.com>
Cc: Greg KH <gregkh@...uxfoundation.org>,
Arnd Bergmann <arnd@...db.de>,
"Linux-Kernel@...r. Kernel. Org" <linux-kernel@...r.kernel.org>
Subject: Re: [char-misc-next 03/14] mei: me_client lookup function to return
me_client object
On Thu, Aug 21, 2014 at 7:29 AM, Tomas Winkler <tomas.winkler@...el.com> wrote:
> In order to support dynamic addition/removal of me clients we cannot
cannot what?
> It is incontinent to use static array and we can use list.
> As the first step we change the lookup function to return
> me client address instead of the index.
This changelog seems to have some missing parts to it.
josh
>
> Signed-off-by: Tomas Winkler <tomas.winkler@...el.com>
> ---
> drivers/misc/mei/amthif.c | 29 +++++++++++------------------
> drivers/misc/mei/bus.c | 10 +++++-----
> drivers/misc/mei/client.c | 43 ++++++++++++++++++++-----------------------
> drivers/misc/mei/client.h | 5 +++--
> drivers/misc/mei/hbm.c | 23 +++++++++--------------
> drivers/misc/mei/main.c | 30 ++++++++++++++----------------
> drivers/misc/mei/nfc.c | 15 ++++++++-------
> drivers/misc/mei/wd.c | 8 ++++----
> 8 files changed, 74 insertions(+), 89 deletions(-)
>
> diff --git a/drivers/misc/mei/amthif.c b/drivers/misc/mei/amthif.c
> index ab60959..c1fc6dd 100644
> --- a/drivers/misc/mei/amthif.c
> +++ b/drivers/misc/mei/amthif.c
> @@ -68,27 +68,26 @@ void mei_amthif_reset_params(struct mei_device *dev)
> int mei_amthif_host_init(struct mei_device *dev)
> {
> struct mei_cl *cl = &dev->iamthif_cl;
> + struct mei_me_client *me_cl;
> unsigned char *msg_buf;
> - int ret, i;
> + int ret;
>
> dev->iamthif_state = MEI_IAMTHIF_IDLE;
>
> mei_cl_init(cl, dev);
>
> - i = mei_me_cl_by_uuid(dev, &mei_amthif_guid);
> - if (i < 0) {
> - dev_info(&dev->pdev->dev,
> - "amthif: failed to find the client %d\n", i);
> + me_cl = mei_me_cl_by_uuid(dev, &mei_amthif_guid);
> + if (!me_cl) {
> + dev_info(&dev->pdev->dev, "amthif: failed to find the client");
> return -ENOTTY;
> }
>
> - cl->me_client_id = dev->me_clients[i].client_id;
> + cl->me_client_id = me_cl->client_id;
>
> /* Assign iamthif_mtu to the value received from ME */
>
> - dev->iamthif_mtu = dev->me_clients[i].props.max_msg_length;
> - dev_dbg(&dev->pdev->dev, "IAMTHIF_MTU = %d\n",
> - dev->me_clients[i].props.max_msg_length);
> + dev->iamthif_mtu = me_cl->props.max_msg_length;
> + dev_dbg(&dev->pdev->dev, "IAMTHIF_MTU = %d\n", dev->iamthif_mtu);
>
> kfree(dev->iamthif_msg_buf);
> dev->iamthif_msg_buf = NULL;
> @@ -157,12 +156,11 @@ struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev,
> int mei_amthif_read(struct mei_device *dev, struct file *file,
> char __user *ubuf, size_t length, loff_t *offset)
> {
> - int rets;
> - int wait_ret;
> - struct mei_cl_cb *cb = NULL;
> struct mei_cl *cl = file->private_data;
> + struct mei_cl_cb *cb;
> unsigned long timeout;
> - int i;
> + int rets;
> + int wait_ret;
>
> /* Only possible if we are in timeout */
> if (!cl) {
> @@ -170,11 +168,6 @@ int mei_amthif_read(struct mei_device *dev, struct file *file,
> return -ETIME;
> }
>
> - i = mei_me_cl_by_id(dev, dev->iamthif_cl.me_client_id);
> - if (i < 0) {
> - dev_dbg(&dev->pdev->dev, "amthif client not found.\n");
> - return -ENOTTY;
> - }
> dev_dbg(&dev->pdev->dev, "checking amthif data\n");
> cb = mei_amthif_find_read_list_entry(dev, file);
>
> diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c
> index 0e993ef..c829676 100644
> --- a/drivers/misc/mei/bus.c
> +++ b/drivers/misc/mei/bus.c
> @@ -229,8 +229,8 @@ static int ___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 id;
> int rets;
>
> if (WARN_ON(!cl || !cl->dev))
> @@ -242,11 +242,11 @@ static int ___mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length,
> return -ENODEV;
>
> /* Check if we have an ME client device */
> - id = mei_me_cl_by_id(dev, cl->me_client_id);
> - if (id < 0)
> - return id;
> + me_cl = mei_me_cl_by_id(dev, cl->me_client_id);
> + if (!me_cl)
> + return -ENOTTY;
>
> - if (length > dev->me_clients[id].props.max_msg_length)
> + if (length > me_cl->props.max_msg_length)
> return -EFBIG;
>
> cb = mei_io_cb_init(cl, NULL);
> diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
> index a90052e..2d5f305 100644
> --- a/drivers/misc/mei/client.c
> +++ b/drivers/misc/mei/client.c
> @@ -33,18 +33,19 @@
> *
> * Locking: called under "dev->device_lock" lock
> *
> - * returns me client index or -ENOENT if not found
> + * returns me client or NULL if not found
> */
> -int mei_me_cl_by_uuid(const struct mei_device *dev, const uuid_le *uuid)
> +struct mei_me_client *mei_me_cl_by_uuid(const struct mei_device *dev,
> + const uuid_le *uuid)
> {
> int i;
>
> for (i = 0; i < dev->me_clients_num; ++i)
> if (uuid_le_cmp(*uuid,
> dev->me_clients[i].props.protocol_name) == 0)
> - return i;
> + return &dev->me_clients[i];
>
> - return -ENOENT;
> + return NULL;
> }
>
>
> @@ -56,18 +57,18 @@ int mei_me_cl_by_uuid(const struct mei_device *dev, const uuid_le *uuid)
> *
> * Locking: called under "dev->device_lock" lock
> *
> - * returns index on success, -ENOENT on failure.
> + * returns me client or NULL if not found
> */
>
> -int mei_me_cl_by_id(struct mei_device *dev, u8 client_id)
> +struct mei_me_client *mei_me_cl_by_id(struct mei_device *dev, u8 client_id)
> {
> int i;
>
> for (i = 0; i < dev->me_clients_num; i++)
> if (dev->me_clients[i].client_id == client_id)
> - return i;
> + return &dev->me_clients[i];
>
> - return -ENOENT;
> + return NULL;
> }
>
>
> @@ -646,7 +647,6 @@ int mei_cl_flow_ctrl_creds(struct mei_cl *cl)
> {
> struct mei_device *dev;
> struct mei_me_client *me_cl;
> - int id;
>
> if (WARN_ON(!cl || !cl->dev))
> return -EINVAL;
> @@ -659,13 +659,12 @@ int mei_cl_flow_ctrl_creds(struct mei_cl *cl)
> if (cl->mei_flow_ctrl_creds > 0)
> return 1;
>
> - id = mei_me_cl_by_id(dev, cl->me_client_id);
> - if (id < 0) {
> + me_cl = mei_me_cl_by_id(dev, cl->me_client_id);
> + if (!me_cl) {
> cl_err(dev, cl, "no such me client %d\n", cl->me_client_id);
> - return id;
> + return -ENOENT;
> }
>
> - me_cl = &dev->me_clients[id];
> if (me_cl->mei_flow_ctrl_creds) {
> if (WARN_ON(me_cl->props.single_recv_buf == 0))
> return -EINVAL;
> @@ -688,21 +687,19 @@ int mei_cl_flow_ctrl_reduce(struct mei_cl *cl)
> {
> struct mei_device *dev;
> struct mei_me_client *me_cl;
> - int id;
>
> if (WARN_ON(!cl || !cl->dev))
> return -EINVAL;
>
> dev = cl->dev;
>
> - id = mei_me_cl_by_id(dev, cl->me_client_id);
> - if (id < 0) {
> + me_cl = mei_me_cl_by_id(dev, cl->me_client_id);
> + if (!me_cl) {
> cl_err(dev, cl, "no such me client %d\n", cl->me_client_id);
> - return id;
> + return -ENOENT;
> }
>
> - me_cl = &dev->me_clients[id];
> - if (me_cl->props.single_recv_buf != 0) {
> + if (me_cl->props.single_recv_buf) {
> if (WARN_ON(me_cl->mei_flow_ctrl_creds <= 0))
> return -EINVAL;
> me_cl->mei_flow_ctrl_creds--;
> @@ -725,8 +722,8 @@ int mei_cl_read_start(struct mei_cl *cl, size_t length)
> {
> struct mei_device *dev;
> struct mei_cl_cb *cb;
> + struct mei_me_client *me_cl;
> int rets;
> - int i;
>
> if (WARN_ON(!cl || !cl->dev))
> return -ENODEV;
> @@ -740,8 +737,8 @@ int mei_cl_read_start(struct mei_cl *cl, size_t length)
> cl_dbg(dev, cl, "read is pending.\n");
> return -EBUSY;
> }
> - i = mei_me_cl_by_id(dev, cl->me_client_id);
> - if (i < 0) {
> + me_cl = mei_me_cl_by_id(dev, cl->me_client_id);
> + if (!me_cl) {
> cl_err(dev, cl, "no such me client %d\n", cl->me_client_id);
> return -ENOTTY;
> }
> @@ -760,7 +757,7 @@ int mei_cl_read_start(struct mei_cl *cl, size_t length)
> }
>
> /* always allocate at least client max message */
> - length = max_t(size_t, length, dev->me_clients[i].props.max_msg_length);
> + length = max_t(size_t, length, me_cl->props.max_msg_length);
> rets = mei_io_cb_alloc_resp_buf(cb, length);
> if (rets)
> goto out;
> diff --git a/drivers/misc/mei/client.h b/drivers/misc/mei/client.h
> index bf2b0b1..ddb95b2 100644
> --- a/drivers/misc/mei/client.h
> +++ b/drivers/misc/mei/client.h
> @@ -24,8 +24,9 @@
>
> #include "mei_dev.h"
>
> -int mei_me_cl_by_uuid(const struct mei_device *dev, const uuid_le *cuuid);
> -int mei_me_cl_by_id(struct mei_device *dev, u8 client_id);
> +struct mei_me_client *mei_me_cl_by_uuid(const struct mei_device *dev,
> + const uuid_le *cuuid);
> +struct mei_me_client *mei_me_cl_by_id(struct mei_device *dev, u8 client_id);
>
> /*
> * MEI IO Functions
> diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c
> index 2b4ea16..0b21675 100644
> --- a/drivers/misc/mei/hbm.c
> +++ b/drivers/misc/mei/hbm.c
> @@ -402,25 +402,20 @@ static int mei_hbm_add_single_flow_creds(struct mei_device *dev,
> struct hbm_flow_control *flow)
> {
> struct mei_me_client *me_cl;
> - int id;
>
> - id = mei_me_cl_by_id(dev, flow->me_addr);
> - if (id < 0) {
> + me_cl = mei_me_cl_by_id(dev, flow->me_addr);
> + if (!me_cl) {
> dev_err(&dev->pdev->dev, "no such me client %d\n",
> flow->me_addr);
> - return id;
> + return -ENOENT;
> }
>
> - me_cl = &dev->me_clients[id];
> - if (me_cl->props.single_recv_buf) {
> - me_cl->mei_flow_ctrl_creds++;
> - dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n",
> - flow->me_addr);
> - dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n",
> - me_cl->mei_flow_ctrl_creds);
> - } else {
> - BUG(); /* error in flow control */
> - }
> + if (WARN_ON(me_cl->props.single_recv_buf == 0))
> + return -EINVAL;
> +
> + me_cl->mei_flow_ctrl_creds++;
> + dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single) creds = %d.\n",
> + flow->me_addr, me_cl->mei_flow_ctrl_creds);
>
> return 0;
> }
> diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
> index 401a3d5..a65b7cc 100644
> --- a/drivers/misc/mei/main.c
> +++ b/drivers/misc/mei/main.c
> @@ -303,11 +303,11 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
> size_t length, loff_t *offset)
> {
> struct mei_cl *cl = file->private_data;
> + struct mei_me_client *me_cl;
> struct mei_cl_cb *write_cb = NULL;
> struct mei_device *dev;
> unsigned long timeout = 0;
> int rets;
> - int id;
>
> if (WARN_ON(!cl || !cl->dev))
> return -ENODEV;
> @@ -321,8 +321,8 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
> goto out;
> }
>
> - id = mei_me_cl_by_id(dev, cl->me_client_id);
> - if (id < 0) {
> + me_cl = mei_me_cl_by_id(dev, cl->me_client_id);
> + if (!me_cl) {
> rets = -ENOTTY;
> goto out;
> }
> @@ -332,7 +332,7 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
> goto out;
> }
>
> - if (length > dev->me_clients[id].props.max_msg_length) {
> + if (length > me_cl->props.max_msg_length) {
> rets = -EFBIG;
> goto out;
> }
> @@ -428,8 +428,8 @@ static int mei_ioctl_connect_client(struct file *file,
> {
> struct mei_device *dev;
> struct mei_client *client;
> + struct mei_me_client *me_cl;
> struct mei_cl *cl;
> - int i;
> int rets;
>
> cl = file->private_data;
> @@ -450,22 +450,22 @@ static int mei_ioctl_connect_client(struct file *file,
> }
>
> /* find ME client we're trying to connect to */
> - i = mei_me_cl_by_uuid(dev, &data->in_client_uuid);
> - if (i < 0 || dev->me_clients[i].props.fixed_address) {
> + me_cl = mei_me_cl_by_uuid(dev, &data->in_client_uuid);
> + if (!me_cl || me_cl->props.fixed_address) {
> dev_dbg(&dev->pdev->dev, "Cannot connect to FW Client UUID = %pUl\n",
> &data->in_client_uuid);
> rets = -ENOTTY;
> goto end;
> }
>
> - cl->me_client_id = dev->me_clients[i].client_id;
> + cl->me_client_id = me_cl->client_id;
>
> dev_dbg(&dev->pdev->dev, "Connect to FW Client ID = %d\n",
> cl->me_client_id);
> dev_dbg(&dev->pdev->dev, "FW Client - Protocol Version = %d\n",
> - dev->me_clients[i].props.protocol_version);
> + me_cl->props.protocol_version);
> dev_dbg(&dev->pdev->dev, "FW Client - Max Msg Len = %d\n",
> - dev->me_clients[i].props.max_msg_length);
> + me_cl->props.max_msg_length);
>
> /* if we're connecting to amthif client then we will use the
> * existing connection
> @@ -484,10 +484,8 @@ static int mei_ioctl_connect_client(struct file *file,
> file->private_data = &dev->iamthif_cl;
>
> client = &data->out_client_properties;
> - client->max_msg_length =
> - dev->me_clients[i].props.max_msg_length;
> - client->protocol_version =
> - dev->me_clients[i].props.protocol_version;
> + client->max_msg_length = me_cl->props.max_msg_length;
> + client->protocol_version = me_cl->props.protocol_version;
> rets = dev->iamthif_cl.status;
>
> goto end;
> @@ -496,8 +494,8 @@ static int mei_ioctl_connect_client(struct file *file,
>
> /* prepare the output buffer */
> client = &data->out_client_properties;
> - client->max_msg_length = dev->me_clients[i].props.max_msg_length;
> - client->protocol_version = dev->me_clients[i].props.protocol_version;
> + client->max_msg_length = me_cl->props.max_msg_length;
> + client->protocol_version = me_cl->props.protocol_version;
> dev_dbg(&dev->pdev->dev, "Can connect?\n");
>
>
> diff --git a/drivers/misc/mei/nfc.c b/drivers/misc/mei/nfc.c
> index 5ccc23b..964b4c6 100644
> --- a/drivers/misc/mei/nfc.c
> +++ b/drivers/misc/mei/nfc.c
> @@ -480,7 +480,8 @@ int mei_nfc_host_init(struct mei_device *dev)
> {
> struct mei_nfc_dev *ndev = &nfc_dev;
> struct mei_cl *cl_info, *cl = NULL;
> - int i, ret;
> + struct mei_me_client *me_cl;
> + int ret;
>
> /* already initialized */
> if (ndev->cl_info)
> @@ -498,14 +499,14 @@ int mei_nfc_host_init(struct mei_device *dev)
> }
>
> /* check for valid client id */
> - i = mei_me_cl_by_uuid(dev, &mei_nfc_info_guid);
> - if (i < 0) {
> + me_cl = mei_me_cl_by_uuid(dev, &mei_nfc_info_guid);
> + if (!me_cl) {
> dev_info(&dev->pdev->dev, "nfc: failed to find the client\n");
> ret = -ENOTTY;
> goto err;
> }
>
> - cl_info->me_client_id = dev->me_clients[i].client_id;
> + cl_info->me_client_id = me_cl->client_id;
>
> ret = mei_cl_link(cl_info, MEI_HOST_CLIENT_ID_ANY);
> if (ret)
> @@ -516,14 +517,14 @@ int mei_nfc_host_init(struct mei_device *dev)
> list_add_tail(&cl_info->device_link, &dev->device_list);
>
> /* check for valid client id */
> - i = mei_me_cl_by_uuid(dev, &mei_nfc_guid);
> - if (i < 0) {
> + me_cl = mei_me_cl_by_uuid(dev, &mei_nfc_guid);
> + if (!me_cl) {
> dev_info(&dev->pdev->dev, "nfc: failed to find the client\n");
> ret = -ENOTTY;
> goto err;
> }
>
> - cl->me_client_id = dev->me_clients[i].client_id;
> + cl->me_client_id = me_cl->client_id;
>
> ret = mei_cl_link(cl, MEI_HOST_CLIENT_ID_ANY);
> if (ret)
> diff --git a/drivers/misc/mei/wd.c b/drivers/misc/mei/wd.c
> index a84a664..8b241ee 100644
> --- a/drivers/misc/mei/wd.c
> +++ b/drivers/misc/mei/wd.c
> @@ -59,7 +59,7 @@ static void mei_wd_set_start_timeout(struct mei_device *dev, u16 timeout)
> int mei_wd_host_init(struct mei_device *dev)
> {
> struct mei_cl *cl = &dev->wd_cl;
> - int id;
> + struct mei_me_client *me_cl;
> int ret;
>
> mei_cl_init(cl, dev);
> @@ -69,13 +69,13 @@ int mei_wd_host_init(struct mei_device *dev)
>
>
> /* check for valid client id */
> - id = mei_me_cl_by_uuid(dev, &mei_wd_guid);
> - if (id < 0) {
> + me_cl = mei_me_cl_by_uuid(dev, &mei_wd_guid);
> + if (!me_cl) {
> dev_info(&dev->pdev->dev, "wd: failed to find the client\n");
> return -ENOTTY;
> }
>
> - cl->me_client_id = dev->me_clients[id].client_id;
> + cl->me_client_id = me_cl->client_id;
>
> ret = mei_cl_link(cl, MEI_WD_HOST_CLIENT_ID);
>
> --
> 1.9.3
>
> --
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