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mei: amthif: replace amthif_rd_complete_list with rd_completed

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Now when we have per client rd_completed list we can remove
the amthif specific amthif_rd_complete_list.
In addition in the function mei_amthif_read do not loop over the
rd_completed list like the original code as the code path is unlocked.

Reviewed-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:
Tomas Winkler 2016-02-07 23:35:26 +02:00 committed by Greg Kroah-Hartman
parent 5cf8b2a9be
commit 9abd8b3129
5 changed files with 13 additions and 37 deletions
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39
drivers/misc/mei/amthif.c
View File

@ -84,26 +84,6 @@ int mei_amthif_host_init(struct mei_device *dev, struct mei_me_client *me_cl)
return ret;
}
/**
* mei_amthif_find_read_list_entry - finds a amthilist entry for current file
*
* @dev: the device structure
* @file: pointer to file object
*
* Return: returned a list entry on success, NULL on failure.
*/
struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev,
const struct file *file)
{
struct mei_cl_cb *cb;
list_for_each_entry(cb, &dev->amthif_rd_complete_list.list, list)
if (cb->fp == file)
return cb;
return NULL;
}
/**
* mei_amthif_read - read data from AMTHIF client
*
@ -123,12 +103,13 @@ 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)
{
struct mei_cl *cl = file->private_data;
struct mei_cl_cb *cb;
int rets;
int wait_ret;
dev_dbg(dev->dev, "checking amthif data\n");
cb = mei_amthif_find_read_list_entry(dev, file);
cb = mei_cl_read_cb(cl, file);
/* Check for if we can block or not*/
if (cb == NULL && file->f_flags & O_NONBLOCK)
@ -141,7 +122,7 @@ int mei_amthif_read(struct mei_device *dev, struct file *file,
mutex_unlock(&dev->device_lock);
wait_ret = wait_event_interruptible(dev->iamthif_cl.wait,
(cb = mei_amthif_find_read_list_entry(dev, file)));
!list_empty(&cl->rd_completed));
/* Locking again the Mutex */
mutex_lock(&dev->device_lock);
@ -149,7 +130,7 @@ int mei_amthif_read(struct mei_device *dev, struct file *file,
if (wait_ret)
return -ERESTARTSYS;
dev_dbg(dev->dev, "woke up from sleep\n");
cb = mei_cl_read_cb(cl, file);
}
if (cb->status) {
@ -420,11 +401,12 @@ int mei_amthif_irq_read_msg(struct mei_cl *cl,
/**
* mei_amthif_complete - complete amthif callback.
*
* @dev: the device structure.
* @cl: host client
* @cb: callback block.
*/
void mei_amthif_complete(struct mei_device *dev, struct mei_cl_cb *cb)
void mei_amthif_complete(struct mei_cl *cl, struct mei_cl_cb *cb)
{
struct mei_device *dev = cl->dev;
if (cb->fop_type == MEI_FOP_WRITE) {
if (!cb->status) {
@ -436,7 +418,7 @@ void mei_amthif_complete(struct mei_device *dev, struct mei_cl_cb *cb)
* in case of error enqueue the write cb to complete read list
* so it can be propagated to the reader
*/
list_add_tail(&cb->list, &dev->amthif_rd_complete_list.list);
list_add_tail(&cb->list, &cl->rd_completed);
wake_up_interruptible(&dev->iamthif_cl.wait);
return;
}
@ -444,7 +426,7 @@ void mei_amthif_complete(struct mei_device *dev, struct mei_cl_cb *cb)
if (!dev->iamthif_canceled) {
dev->iamthif_state = MEI_IAMTHIF_READ_COMPLETE;
dev->iamthif_stall_timer = 0;
list_add_tail(&cb->list, &dev->amthif_rd_complete_list.list);
list_add_tail(&cb->list, &cl->rd_completed);
dev_dbg(dev->dev, "amthif read completed\n");
} else {
mei_amthif_run_next_cmd(dev);
@ -506,10 +488,11 @@ static bool mei_clear_list(struct mei_device *dev,
static bool mei_clear_lists(struct mei_device *dev, const struct file *file)
{
bool removed = false;
struct mei_cl *cl = &dev->iamthif_cl;
/* remove callbacks associated with a file */
mei_clear_list(dev, file, &dev->amthif_cmd_list.list);
if (mei_clear_list(dev, file, &dev->amthif_rd_complete_list.list))
if (mei_clear_list(dev, file, &cl->rd_completed))
removed = true;
mei_clear_list(dev, file, &dev->ctrl_rd_list.list);

1
drivers/misc/mei/client.c
View File

@ -536,7 +536,6 @@ int mei_cl_flush_queues(struct mei_cl *cl, const struct file *fp)
mei_io_list_flush(&cl->dev->ctrl_wr_list, cl);
mei_io_list_flush(&cl->dev->ctrl_rd_list, cl);
mei_io_list_flush(&cl->dev->amthif_cmd_list, cl);
mei_io_list_flush(&cl->dev->amthif_rd_complete_list, cl);
mei_cl_read_cb_flush(cl, fp);

1
drivers/misc/mei/init.c
View File

@ -402,7 +402,6 @@ void mei_device_init(struct mei_device *dev,
INIT_LIST_HEAD(&dev->iamthif_cl.link);
mei_io_list_init(&dev->amthif_cmd_list);
mei_io_list_init(&dev->amthif_rd_complete_list);
bitmap_zero(dev->host_clients_map, MEI_CLIENTS_MAX);
dev->open_handle_count = 0;

2
drivers/misc/mei/interrupt.c
View File

@ -48,7 +48,7 @@ void mei_irq_compl_handler(struct mei_device *dev, struct mei_cl_cb *compl_list)
dev_dbg(dev->dev, "completing call back.\n");
if (cl == &dev->iamthif_cl)
mei_amthif_complete(dev, cb);
mei_amthif_complete(cl, cb);
else
mei_cl_complete(cl, cb);
}

7
drivers/misc/mei/mei_dev.h
View File

@ -406,7 +406,6 @@ const char *mei_pg_state_str(enum mei_pg_state state);
* @allow_fixed_address: allow user space to connect a fixed client
*
* @amthif_cmd_list : amthif list for cmd waiting
* @amthif_rd_complete_list : amthif list for reading completed cmd data
* @iamthif_fp : file for current amthif operation
* @iamthif_cl : amthif host client
* @iamthif_current_cb : amthif current operation callback
@ -496,7 +495,6 @@ struct mei_device {
/* amthif list for cmd waiting */
struct mei_cl_cb amthif_cmd_list;
/* driver managed amthif list for reading completed amthif cmd data */
struct mei_cl_cb amthif_rd_complete_list;
const struct file *iamthif_fp;
struct mei_cl iamthif_cl;
struct mei_cl_cb *iamthif_current_cb;
@ -589,15 +587,12 @@ unsigned int mei_amthif_poll(struct mei_device *dev,
int mei_amthif_release(struct mei_device *dev, struct file *file);
struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev,
const struct file *file);
int mei_amthif_write(struct mei_cl *cl, struct mei_cl_cb *cb);
int mei_amthif_run_next_cmd(struct mei_device *dev);
int mei_amthif_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
struct mei_cl_cb *cmpl_list);
void mei_amthif_complete(struct mei_device *dev, struct mei_cl_cb *cb);
void mei_amthif_complete(struct mei_cl *cl, struct mei_cl_cb *cb);
int mei_amthif_irq_read_msg(struct mei_cl *cl,
struct mei_msg_hdr *mei_hdr,
struct mei_cl_cb *complete_list);