mei: amthif: drop READ_COMPLETE state

AMTHIF code now uses read completed queue to store replies from the FW.
It is possible to send the next request as soon as a read from the FW is
completed. With these changes we don't need the READ_COMPLETE state.

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>

diff --git a/drivers/misc/mei/amthif.c b/drivers/misc/mei/amthif.c
index a039a5d..13d8904 100644 (file)
--- a/drivers/misc/mei/amthif.c
+++ b/drivers/misc/mei/amthif.c
@@ -299,8 +299,7 @@ int mei_amthif_write(struct mei_cl *cl, struct mei_cl_cb *cb)
        /*
         * The previous request is still in processing, queue this one.
         */
-       if (dev->iamthif_state > MEI_IAMTHIF_IDLE &&
-           dev->iamthif_state < MEI_IAMTHIF_READ_COMPLETE)
+       if (dev->iamthif_state != MEI_IAMTHIF_IDLE)
                return 0;
 
        return mei_amthif_run_next_cmd(dev);
@@ -309,7 +308,6 @@ int mei_amthif_write(struct mei_cl *cl, struct mei_cl_cb *cb)
 /**
  * mei_amthif_poll - the amthif poll function
  *
- * @dev: the device structure
  * @file: pointer to file structure
  * @wait: pointer to poll_table structure
  *
@@ -317,26 +315,19 @@ int mei_amthif_write(struct mei_cl *cl, struct mei_cl_cb *cb)
  *
  * Locking: called under "dev->device_lock" lock
  */
-
-unsigned int mei_amthif_poll(struct mei_device *dev,
-               struct file *file, poll_table *wait)
+unsigned int mei_amthif_poll(struct file *file, poll_table *wait)
 {
+       struct mei_cl *cl = file->private_data;
+       struct mei_cl_cb *cb = mei_cl_read_cb(cl, file);
        unsigned int mask = 0;
 
-       poll_wait(file, &dev->iamthif_cl.rx_wait, wait);
-
-       if (dev->iamthif_state == MEI_IAMTHIF_READ_COMPLETE &&
-           dev->iamthif_fp == file) {
-
+       poll_wait(file, &cl->rx_wait, wait);
+       if (cb)
                mask |= POLLIN | POLLRDNORM;
-               mei_amthif_run_next_cmd(dev);
-       }
 
        return mask;
 }
 
-
-
 /**
  * mei_amthif_irq_write - write iamthif command in irq thread context.
  *
@@ -393,7 +384,6 @@ int mei_amthif_irq_read_msg(struct mei_cl *cl,
                return 0;
 
        dev_dbg(dev->dev, "completed amthif read.\n ");
-       dev->iamthif_current_cb = NULL;
        dev->iamthif_stall_timer = 0;
 
        return 0;
@@ -425,14 +415,16 @@ void mei_amthif_complete(struct mei_cl *cl, 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, &cl->rd_completed);
                dev_dbg(dev->dev, "amthif read completed\n");
        } else {
-               mei_amthif_run_next_cmd(dev);
+               mei_io_cb_free(cb);
        }
 
+       dev->iamthif_current_cb = NULL;
+       dev->iamthif_stall_timer = 0;
+       mei_amthif_run_next_cmd(dev);
+
        dev_dbg(dev->dev, "completing amthif call back.\n");
        wake_up_interruptible(&cl->rx_wait);
 }
@@ -539,10 +531,6 @@ int mei_amthif_release(struct mei_device *dev, struct file *file)
                dev_dbg(dev->dev, "amthif canceled iamthif state %d\n",
                    dev->iamthif_state);
                dev->iamthif_canceled = true;
-               if (dev->iamthif_state == MEI_IAMTHIF_READ_COMPLETE) {
-                       dev_dbg(dev->dev, "run next amthif iamthif cb\n");
-                       mei_amthif_run_next_cmd(dev);
-               }
        }
 
        if (mei_clear_lists(dev, file))

diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index 52635b0..622ff19 100644 (file)
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -610,7 +610,7 @@ static unsigned int mei_poll(struct file *file, poll_table *wait)
        }
 
        if (cl == &dev->iamthif_cl) {
-               mask = mei_amthif_poll(dev, file, wait);
+               mask = mei_amthif_poll(file, wait);
                goto out;
        }
 

diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index e5e3250..fa60077 100644 (file)
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -80,9 +80,7 @@ const char *mei_dev_state_str(int state);
 enum iamthif_states {
        MEI_IAMTHIF_IDLE,
        MEI_IAMTHIF_WRITING,
-       MEI_IAMTHIF_FLOW_CONTROL,
        MEI_IAMTHIF_READING,
-       MEI_IAMTHIF_READ_COMPLETE
 };
 
 enum mei_file_transaction_states {
@@ -572,8 +570,7 @@ int mei_amthif_host_init(struct mei_device *dev, struct mei_me_client *me_cl);
 int mei_amthif_read(struct mei_device *dev, struct file *file,
                char __user *ubuf, size_t length, loff_t *offset);
 
-unsigned int mei_amthif_poll(struct mei_device *dev,
-               struct file *file, poll_table *wait);
+unsigned int mei_amthif_poll(struct file *file, poll_table *wait);
 
 int mei_amthif_release(struct mei_device *dev, struct file *file);