From: Alexander Usyskin Date: Mon, 25 Jul 2016 22:06:07 +0000 (+0300) Subject: mei: amthif: drop mei_amthif_read X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9d27e73c1897c17e535987a4758fddb7a2fe1fd3;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git mei: amthif: drop mei_amthif_read mei_amthif_read have only one difference from mei_read, it is not calling mei_read_start(). Make mei_read_start return immediately for amthif client and drop the special mei_amthif_read function. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/misc/mei/amthif.c b/drivers/misc/mei/amthif.c index e8029235504d..2222b60e9208 100644 --- a/drivers/misc/mei/amthif.c +++ b/drivers/misc/mei/amthif.c @@ -84,106 +84,6 @@ int mei_amthif_host_init(struct mei_device *dev, struct mei_me_client *me_cl) return ret; } -/** - * mei_amthif_read - read data from AMTHIF client - * - * @dev: the device structure - * @file: pointer to file object - * @ubuf: pointer to user data in user space - * @length: data length to read - * @offset: data read offset - * - * Locking: called under "dev->device_lock" lock - * - * Return: - * returned data length on success, - * zero if no data to read, - * negative on failure. - */ -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_cl_read_cb(cl, file); - - /* Check for if we can block or not*/ - if (cb == NULL && file->f_flags & O_NONBLOCK) - return -EAGAIN; - - - dev_dbg(dev->dev, "waiting for amthif data\n"); - while (cb == NULL) { - /* unlock the Mutex */ - mutex_unlock(&dev->device_lock); - - wait_ret = wait_event_interruptible(cl->rx_wait, - !list_empty(&cl->rd_completed) || - !mei_cl_is_connected(cl)); - - /* Locking again the Mutex */ - mutex_lock(&dev->device_lock); - - if (wait_ret) - return -ERESTARTSYS; - - if (!mei_cl_is_connected(cl)) { - rets = -ENODEV; - goto out; - } - - cb = mei_cl_read_cb(cl, file); - } - - if (cb->status) { - rets = cb->status; - dev_dbg(dev->dev, "read operation failed %d\n", rets); - goto free; - } - - dev_dbg(dev->dev, "Got amthif data\n"); - /* if the whole message will fit remove it from the list */ - if (cb->buf_idx >= *offset && length >= (cb->buf_idx - *offset)) - list_del_init(&cb->list); - else if (cb->buf_idx <= *offset) { - /* end of the message has been reached */ - list_del_init(&cb->list); - rets = 0; - goto free; - } - /* else means that not full buffer will be read and do not - * remove message from deletion list - */ - - dev_dbg(dev->dev, "amthif cb->buf.size - %zu cb->buf_idx - %zu\n", - cb->buf.size, cb->buf_idx); - - /* length is being truncated to PAGE_SIZE, however, - * the buf_idx may point beyond */ - length = min_t(size_t, length, (cb->buf_idx - *offset)); - - if (copy_to_user(ubuf, cb->buf.data + *offset, length)) { - dev_dbg(dev->dev, "failed to copy data to userland\n"); - rets = -EFAULT; - } else { - rets = length; - if ((*offset + length) < cb->buf_idx) { - *offset += length; - goto out; - } - } -free: - dev_dbg(dev->dev, "free amthif cb memory.\n"); - *offset = 0; - mei_io_cb_free(cb); -out: - return rets; -} - /** * mei_amthif_read_start - queue message for sending read credential * diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c index c924ba92c834..45a7652820cf 100644 --- a/drivers/misc/mei/client.c +++ b/drivers/misc/mei/client.c @@ -1462,7 +1462,7 @@ int mei_cl_read_start(struct mei_cl *cl, size_t length, const struct file *fp) return -ENOTTY; } - if (mei_cl_is_fixed_address(cl)) + if (mei_cl_is_fixed_address(cl) || cl == &dev->iamthif_cl) return 0; /* HW currently supports only one pending read */ diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c index 650061b6ab9b..fa50635512e8 100644 --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -164,11 +164,6 @@ static ssize_t mei_read(struct file *file, char __user *ubuf, goto out; } - if (cl == &dev->iamthif_cl) { - rets = mei_amthif_read(dev, file, ubuf, length, offset); - goto out; - } - cb = mei_cl_read_cb(cl, file); if (cb) goto copy_buffer; diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index 7c8fa8d70e11..2ef1ad6c391a 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -564,9 +564,6 @@ void mei_amthif_reset_params(struct mei_device *dev); 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 file *file, poll_table *wait); int mei_amthif_release(struct mei_device *dev, struct file *file);