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authorTomas Winkler <tomas.winkler@intel.com>2012-07-04 19:24:52 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-07-10 14:58:35 -0700
commit7bdf72d3d8059a50214069ea4b87c2174645f40f (patch)
treeb54edc0497ab402791422a50905e59fc49f71f51 /drivers/misc
parent7cb1ba9b679afe5fc335205fd6fb25fd3e51e33a (diff)
downloadlinux-7bdf72d3d8059a50214069ea4b87c2174645f40f.tar.bz2
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 <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/mei/interface.c2
-rw-r--r--drivers/misc/mei/interface.h6
-rw-r--r--drivers/misc/mei/interrupt.c33
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)