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mei: introduce mei_data2slots wrapper

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Introduce mei_data2slots wrapper for sake of
readability. This wrapper close up the open code
for computing slots from a message length:
rond up dwords count from payload and header byte size

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 2012-07-04 19:24:52 +03:00 committed by Greg Kroah-Hartman
parent 7cb1ba9b67
commit 7bdf72d3d8
3 changed files with 18 additions and 23 deletions
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2
drivers/misc/mei/interface.c
View file

@ -135,7 +135,7 @@ int mei_write_message(struct mei_device *dev, struct mei_msg_hdr *header,
empty_slots = mei_hbuf_empty_slots(dev);
dev_dbg(&dev->pdev->dev, "empty slots = %hu.\n", empty_slots);
dw_cnt = (length + sizeof(*header) + 3) / 4;
dw_cnt = mei_data2slots(length);
if (empty_slots < 0 || dw_cnt > empty_slots)
return -EIO;

6
drivers/misc/mei/interface.h
View file

@ -50,6 +50,12 @@ static inline size_t mei_hbuf_max_data(const struct mei_device *dev)
return dev->hbuf_depth * sizeof(u32) - sizeof(struct mei_msg_hdr);
}
/* get slots (dwords) from a message length + header (bytes) */
static inline unsigned char mei_data2slots(size_t length)
{
return DIV_ROUND_UP(sizeof(struct mei_msg_hdr) + length, 4);
}
int mei_count_full_read_slots(struct mei_device *dev);

33
drivers/misc/mei/interrupt.c
View file

@ -267,8 +267,7 @@ static int _mei_irq_thread_iamthif_read(struct mei_device *dev, s32 *slots)
+ sizeof(struct hbm_flow_control))) {
return -EMSGSIZE;
}
*slots -= (sizeof(struct mei_msg_hdr) +
sizeof(struct hbm_flow_control) + 3) / 4;
*slots -= mei_data2slots(sizeof(struct hbm_flow_control));
if (mei_send_flow_control(dev, &dev->iamthif_cl)) {
dev_dbg(&dev->pdev->dev, "iamthif flow control failed\n");
return -EIO;
@ -302,8 +301,7 @@ static int _mei_irq_thread_close(struct mei_device *dev, s32 *slots,
{
if ((*slots * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) +
sizeof(struct hbm_client_disconnect_request))) {
*slots -= (sizeof(struct mei_msg_hdr) +
sizeof(struct hbm_client_disconnect_request) + 3) / 4;
*slots -= mei_data2slots(sizeof(struct hbm_client_disconnect_request));
if (mei_disconnect(dev, cl)) {
cl->status = 0;
@ -841,8 +839,8 @@ static int _mei_irq_thread_read(struct mei_device *dev, s32 *slots,
return -EBADMSG;
}
*slots -= (sizeof(struct mei_msg_hdr) +
sizeof(struct hbm_flow_control) + 3) / 4;
*slots -= mei_data2slots(sizeof(struct hbm_flow_control));
if (mei_send_flow_control(dev, cl)) {
cl->status = -ENODEV;
cb_pos->information = 0;
@ -874,8 +872,7 @@ static int _mei_irq_thread_ioctl(struct mei_device *dev, s32 *slots,
if ((*slots * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) +
sizeof(struct hbm_client_connect_request))) {
cl->state = MEI_FILE_CONNECTING;
*slots -= (sizeof(struct mei_msg_hdr) +
sizeof(struct hbm_client_connect_request) + 3) / 4;
*slots -= mei_data2slots(sizeof(struct hbm_client_connect_request));
if (mei_connect(dev, cl)) {
cl->status = -ENODEV;
cb_pos->information = 0;
@ -931,8 +928,7 @@ static int _mei_irq_thread_cmpl(struct mei_device *dev, s32 *slots,
cb_pos->information);
dev_dbg(&dev->pdev->dev, "mei_hdr->length =%d\n",
mei_hdr->length);
*slots -= (sizeof(struct mei_msg_hdr) +
mei_hdr->length + 3) / 4;
*slots -= mei_data2slots(mei_hdr->length);
if (mei_write_message(dev, mei_hdr,
(unsigned char *)
(cb_pos->request_buffer.data +
@ -959,9 +955,7 @@ static int _mei_irq_thread_cmpl(struct mei_device *dev, s32 *slots,
(*slots * sizeof(u32)) - sizeof(struct mei_msg_hdr);
mei_hdr->msg_complete = 0;
mei_hdr->reserved = 0;
(*slots) -= (sizeof(struct mei_msg_hdr) +
mei_hdr->length + 3) / 4;
*slots -= mei_data2slots(mei_hdr->length);
if (mei_write_message(dev, mei_hdr,
(unsigned char *)
(cb_pos->request_buffer.data +
@ -1020,8 +1014,7 @@ static int _mei_irq_thread_cmpl_iamthif(struct mei_device *dev, s32 *slots,
mei_hdr->msg_complete = 1;
mei_hdr->reserved = 0;
*slots -= (sizeof(struct mei_msg_hdr) +
mei_hdr->length + 3) / 4;
*slots -= mei_data2slots(mei_hdr->length);
if (mei_write_message(dev, mei_hdr,
(dev->iamthif_msg_buf +
@ -1055,8 +1048,7 @@ static int _mei_irq_thread_cmpl_iamthif(struct mei_device *dev, s32 *slots,
mei_hdr->msg_complete = 0;
mei_hdr->reserved = 0;
*slots -= (sizeof(struct mei_msg_hdr) +
mei_hdr->length + 3) / 4;
*slots -= mei_data2slots(mei_hdr->length);
if (mei_write_message(dev, mei_hdr,
(dev->iamthif_msg_buf +
@ -1266,12 +1258,9 @@ static int mei_irq_thread_write_handler(struct mei_io_list *cmpl_list,
dev->wd_pending = false;
if (dev->wd_timeout)
*slots -= (sizeof(struct mei_msg_hdr) +
MEI_START_WD_DATA_SIZE + 3) / 4;
*slots -= mei_data2slots(MEI_START_WD_DATA_SIZE);
else
*slots -= (sizeof(struct mei_msg_hdr) +
MEI_WD_PARAMS_SIZE + 3) / 4;
*slots -= mei_data2slots(MEI_START_WD_DATA_SIZE);
}
}
if (dev->stop)