From ca455fafc2ef6a26089ba082b89e5d6e89cb2f8f Mon Sep 17 00:00:00 2001 From: Alexander Usyskin Date: Tue, 24 May 2016 16:03:35 -0400 Subject: [PATCH] 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 Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/amthif.c | 34 +++++++++++----------------------- drivers/misc/mei/main.c | 2 +- drivers/misc/mei/mei_dev.h | 5 +---- 3 files changed, 13 insertions(+), 28 deletions(-) diff --git a/drivers/misc/mei/amthif.c b/drivers/misc/mei/amthif.c index a039a5d..13d8904 100644 --- 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 --- 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 --- 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); -- 2.7.4