redonkable/alistair23-linux
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staging/mei: don't check if list is empty before looping

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1. No need to check if a list is empty before list_for_each_ looping as
this is already checked by loop stopping conditional.

The side effect is reduced indentation depth
from:
	if (!list_empty)
		list_for_each()
to:
	list_for_each()

2. drop cb_ prefix from cl_pos, cl_next variables used in list_for_each
loops. The code is more compact and readable

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Tomas Winkler 2011-11-27 21:43:34 +02:00 committed by Greg Kroah-Hartman
parent c83720941f
commit b7cd2d9fdc
4 changed files with 149 additions and 180 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

19
drivers/staging/mei/init.c
View file

@ -48,20 +48,15 @@ void mei_io_list_init(struct mei_io_list *list)
*/
void mei_io_list_flush(struct mei_io_list *list, struct mei_cl *cl)
{
struct mei_cl_cb *cb_pos = NULL;
struct mei_cl_cb *cb_next = NULL;
struct mei_cl_cb *pos = NULL;
struct mei_cl_cb *next = NULL;
if (list_empty(&list->mei_cb.cb_list))
return;
list_for_each_entry_safe(cb_pos, cb_next,
&list->mei_cb.cb_list, cb_list) {
if (cb_pos) {
list_for_each_entry_safe(pos, next, &list->mei_cb.cb_list, cb_list) {
if (pos) {
struct mei_cl *cl_tmp;
cl_tmp = (struct mei_cl *)cb_pos->file_private;
cl_tmp = (struct mei_cl *)pos->file_private;
if (mei_cl_cmp_id(cl, cl_tmp))
list_del(&cb_pos->cb_list);
list_del(&pos->cb_list);
}
}
}
@ -335,7 +330,6 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled)
}
}
/* remove all waiting requests */
if (!list_empty(&dev->write_list.mei_cb.cb_list)) {
list_for_each_entry_safe(cb_pos, cb_next,
&dev->write_list.mei_cb.cb_list, cb_list) {
if (cb_pos) {
@ -344,7 +338,6 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled)
cb_pos = NULL;
}
}
}
}

73
drivers/staging/mei/interrupt.c
View file

@ -412,9 +412,9 @@ static void mei_client_connect_response(struct mei_device *dev,
dev->iamthif_state = MEI_IAMTHIF_IDLE;
return;
}
if (!list_empty(&dev->ctrl_rd_list.mei_cb.cb_list)) {
list_for_each_entry_safe(cb_pos, cb_next,
&dev->ctrl_rd_list.mei_cb.cb_list, cb_list) {
cl = (struct mei_cl *)cb_pos->file_private;
if (!cl) {
list_del(&cb_pos->cb_list);
@ -429,7 +429,6 @@ static void mei_client_connect_response(struct mei_device *dev,
}
}
}
}
}
/**
@ -453,7 +452,6 @@ static void mei_client_disconnect_response(struct mei_device *dev,
rs->host_addr,
rs->status);
if (!list_empty(&dev->ctrl_rd_list.mei_cb.cb_list)) {
list_for_each_entry_safe(cb_pos, cb_next,
&dev->ctrl_rd_list.mei_cb.cb_list, cb_list) {
cl = (struct mei_cl *)cb_pos->file_private;
@ -476,7 +474,6 @@ static void mei_client_disconnect_response(struct mei_device *dev,
break;
}
}
}
}
/**
@ -1222,7 +1219,7 @@ static int mei_irq_thread_write_handler(struct mei_io_list *cmpl_list,
{
struct mei_cl *cl;
struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL;
struct mei_cl_cb *pos = NULL, *next = NULL;
struct mei_io_list *list;
int ret;
@ -1235,29 +1232,27 @@ static int mei_irq_thread_write_handler(struct mei_io_list *cmpl_list,
dev_dbg(&dev->pdev->dev, "complete all waiting for write cb.\n");
list = &dev->write_waiting_list;
if (!list_empty(&list->mei_cb.cb_list)) {
list_for_each_entry_safe(cb_pos, cb_next,
list_for_each_entry_safe(pos, next,
&list->mei_cb.cb_list, cb_list) {
cl = (struct mei_cl *)cb_pos->file_private;
if (cl) {
cl = (struct mei_cl *)pos->file_private;
if (cl == NULL)
continue;
cl->status = 0;
list_del(&cb_pos->cb_list);
list_del(&pos->cb_list);
if (MEI_WRITING == cl->writing_state &&
(cb_pos->major_file_operations ==
MEI_WRITE) &&
(pos->major_file_operations == MEI_WRITE) &&
(cl != &dev->iamthif_cl)) {
dev_dbg(&dev->pdev->dev,
"MEI WRITE COMPLETE\n");
cl->writing_state =
MEI_WRITE_COMPLETE;
list_add_tail(&cb_pos->cb_list,
cl->writing_state = MEI_WRITE_COMPLETE;
list_add_tail(&pos->cb_list,
&cmpl_list->mei_cb.cb_list);
}
if (cl == &dev->iamthif_cl) {
dev_dbg(&dev->pdev->dev, "check iamthif flow control.\n");
if (dev->iamthif_flow_control_pending) {
ret =
_mei_irq_thread_iamthif_read(
ret = _mei_irq_thread_iamthif_read(
dev, slots);
if (ret)
return ret;
@ -1265,9 +1260,6 @@ static int mei_irq_thread_write_handler(struct mei_io_list *cmpl_list,
}
}
}
}
if (dev->stop && !dev->wd_pending) {
dev->wd_stopped = true;
wake_up_interruptible(&dev->wait_stop_wd);
@ -1312,24 +1304,24 @@ static int mei_irq_thread_write_handler(struct mei_io_list *cmpl_list,
/* complete control write list CB */
dev_dbg(&dev->pdev->dev, "complete control write list cb.\n");
list_for_each_entry_safe(cb_pos, cb_next,
list_for_each_entry_safe(pos, next,
&dev->ctrl_wr_list.mei_cb.cb_list, cb_list) {
cl = (struct mei_cl *) cb_pos->file_private;
cl = (struct mei_cl *) pos->file_private;
if (!cl) {
list_del(&cb_pos->cb_list);
list_del(&pos->cb_list);
return -ENODEV;
}
switch (cb_pos->major_file_operations) {
switch (pos->major_file_operations) {
case MEI_CLOSE:
/* send disconnect message */
ret = _mei_irq_thread_close(dev, slots, cb_pos, cl, cmpl_list);
ret = _mei_irq_thread_close(dev, slots, pos, cl, cmpl_list);
if (ret)
return ret;
break;
case MEI_READ:
/* send flow control message */
ret = _mei_irq_thread_read(dev, slots, cb_pos, cl, cmpl_list);
ret = _mei_irq_thread_read(dev, slots, pos, cl, cmpl_list);
if (ret)
return ret;
@ -1338,7 +1330,7 @@ static int mei_irq_thread_write_handler(struct mei_io_list *cmpl_list,
/* connect message */
if (!mei_other_client_is_connecting(dev, cl))
continue;
ret = _mei_irq_thread_ioctl(dev, slots, cb_pos, cl, cmpl_list);
ret = _mei_irq_thread_ioctl(dev, slots, pos, cl, cmpl_list);
if (ret)
return ret;
@ -1350,16 +1342,15 @@ static int mei_irq_thread_write_handler(struct mei_io_list *cmpl_list,
}
/* complete write list CB */
if (!list_empty(&dev->write_list.mei_cb.cb_list)) {
dev_dbg(&dev->pdev->dev, "complete write list cb.\n");
list_for_each_entry_safe(cb_pos, cb_next,
list_for_each_entry_safe(pos, next,
&dev->write_list.mei_cb.cb_list, cb_list) {
cl = (struct mei_cl *)cb_pos->file_private;
cl = (struct mei_cl *)pos->file_private;
if (cl == NULL)
continue;
if (cl) {
if (cl != &dev->iamthif_cl) {
if (!mei_flow_ctrl_creds(dev,
cl)) {
if (!mei_flow_ctrl_creds(dev, cl)) {
dev_dbg(&dev->pdev->dev,
"No flow control"
" credentials for client"
@ -1368,7 +1359,7 @@ static int mei_irq_thread_write_handler(struct mei_io_list *cmpl_list,
continue;
}
ret = _mei_irq_thread_cmpl(dev, slots,
cb_pos,
pos,
cl, cmpl_list);
if (ret)
return ret;
@ -1376,8 +1367,7 @@ static int mei_irq_thread_write_handler(struct mei_io_list *cmpl_list,
} else if (cl == &dev->iamthif_cl) {
/* IAMTHIF IOCTL */
dev_dbg(&dev->pdev->dev, "complete amthi write cb.\n");
if (!mei_flow_ctrl_creds(dev,
cl)) {
if (!mei_flow_ctrl_creds(dev, cl)) {
dev_dbg(&dev->pdev->dev,
"No flow control"
" credentials for amthi"
@ -1387,17 +1377,15 @@ static int mei_irq_thread_write_handler(struct mei_io_list *cmpl_list,
}
ret = _mei_irq_thread_cmpl_iamthif(dev,
slots,
cb_pos,
pos,
cl,
cmpl_list);
if (ret)
return ret;
}
}
}
}
return 0;
}
@ -1487,11 +1475,7 @@ void mei_timer(struct work_struct *work)
amthi_complete_list = &dev->amthi_read_complete_list.
mei_cb.cb_list;
if (!list_empty(amthi_complete_list)) {
list_for_each_entry_safe(cb_pos, cb_next,
amthi_complete_list,
cb_list) {
list_for_each_entry_safe(cb_pos, cb_next, amthi_complete_list, cb_list) {
cl_pos = cb_pos->file_object->private_data;
@ -1499,7 +1483,6 @@ void mei_timer(struct work_struct *work)
if (cl_pos == &dev->iamthif_cl)
list_del(&cb_pos->cb_list);
}
}
if (dev->iamthif_current_cb)
mei_free_cb_private(dev->iamthif_current_cb);

28
drivers/staging/mei/iorw.c
View file

@ -228,17 +228,15 @@ struct mei_cl_cb *find_amthi_read_list_entry(
struct file *file)
{
struct mei_cl *cl_temp;
struct mei_cl_cb *cb_pos = NULL;
struct mei_cl_cb *cb_next = NULL;
struct mei_cl_cb *pos = NULL;
struct mei_cl_cb *next = NULL;
if (!list_empty(&dev->amthi_read_complete_list.mei_cb.cb_list)) {
list_for_each_entry_safe(cb_pos, cb_next,
list_for_each_entry_safe(pos, next,
&dev->amthi_read_complete_list.mei_cb.cb_list, cb_list) {
cl_temp = (struct mei_cl *)cb_pos->file_private;
cl_temp = (struct mei_cl *)pos->file_private;
if (cl_temp && cl_temp == &dev->iamthif_cl &&
cb_pos->file_object == file)
return cb_pos;
}
pos->file_object == file)
return pos;
}
return NULL;
}
@ -549,8 +547,8 @@ int amthi_write(struct mei_device *dev, struct mei_cl_cb *cb)
void mei_run_next_iamthif_cmd(struct mei_device *dev)
{
struct mei_cl *cl_tmp;
struct mei_cl_cb *cb_pos = NULL;
struct mei_cl_cb *cb_next = NULL;
struct mei_cl_cb *pos = NULL;
struct mei_cl_cb *next = NULL;
int status;
if (!dev)
@ -564,16 +562,15 @@ void mei_run_next_iamthif_cmd(struct mei_device *dev)
dev->iamthif_timer = 0;
dev->iamthif_file_object = NULL;
if (!list_empty(&dev->amthi_cmd_list.mei_cb.cb_list)) {
dev_dbg(&dev->pdev->dev, "complete amthi cmd_list cb.\n");
list_for_each_entry_safe(cb_pos, cb_next,
list_for_each_entry_safe(pos, next,
&dev->amthi_cmd_list.mei_cb.cb_list, cb_list) {
list_del(&cb_pos->cb_list);
cl_tmp = (struct mei_cl *)cb_pos->file_private;
list_del(&pos->cb_list);
cl_tmp = (struct mei_cl *)pos->file_private;
if (cl_tmp && cl_tmp == &dev->iamthif_cl) {
status = amthi_write(dev, cb_pos);
status = amthi_write(dev, pos);
if (status) {
dev_dbg(&dev->pdev->dev,
"amthi write failed status = %d\n",
@ -583,7 +580,6 @@ void mei_run_next_iamthif_cmd(struct mei_device *dev)
break;
}
}
}
}
/**

13
drivers/staging/mei/main.c
View file

@ -198,20 +198,17 @@ static struct mei_cl_cb *find_read_list_entry(
struct mei_device *dev,
struct mei_cl *cl)
{
struct mei_cl_cb *cb_pos = NULL;
struct mei_cl_cb *cb_next = NULL;
if (!list_empty(&dev->read_list.mei_cb.cb_list)) {
struct mei_cl_cb *pos = NULL;
struct mei_cl_cb *next = NULL;
dev_dbg(&dev->pdev->dev, "remove read_list CB\n");
list_for_each_entry_safe(cb_pos, cb_next,
list_for_each_entry_safe(pos, next,
&dev->read_list.mei_cb.cb_list, cb_list) {
struct mei_cl *cl_temp;
cl_temp = (struct mei_cl *)cb_pos->file_private;
cl_temp = (struct mei_cl *)pos->file_private;
if (mei_cl_cmp_id(cl, cl_temp))
return cb_pos;
}
return pos;
}
return NULL;
}