From 7bdf72d3d8059a50214069ea4b87c2174645f40f Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Wed, 4 Jul 2012 19:24:52 +0300 Subject: [PATCH] mei: introduce mei_data2slots wrapper 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 Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/interface.c | 2 +- drivers/misc/mei/interface.h | 6 ++++++ drivers/misc/mei/interrupt.c | 33 +++++++++++---------------------- 3 files changed, 18 insertions(+), 23 deletions(-) diff --git a/drivers/misc/mei/interface.c b/drivers/misc/mei/interface.c index 88ada64c0b54..509c3957ff45 100644 --- a/drivers/misc/mei/interface.c +++ b/drivers/misc/mei/interface.c @@ -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; diff --git a/drivers/misc/mei/interface.h b/drivers/misc/mei/interface.h index cd9b778e8dc5..fb5c7db4723b 100644 --- a/drivers/misc/mei/interface.h +++ b/drivers/misc/mei/interface.h @@ -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); diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c index 4c1afcf6f4e9..92d762100268 100644 --- a/drivers/misc/mei/interrupt.c +++ b/drivers/misc/mei/interrupt.c @@ -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) -- 2.20.1