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
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31
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) 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 *pos = NULL;
struct mei_cl_cb *cb_next = NULL; struct mei_cl_cb *next = NULL;
list_for_each_entry_safe(pos, next, &list->mei_cb.cb_list, cb_list) {
if (list_empty(&list->mei_cb.cb_list)) if (pos) {
return;
list_for_each_entry_safe(cb_pos, cb_next,
&list->mei_cb.cb_list, cb_list) {
if (cb_pos) {
struct mei_cl *cl_tmp; 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)) if (mei_cl_cmp_id(cl, cl_tmp))
list_del(&cb_pos->cb_list); list_del(&pos->cb_list);
} }
} }
} }
@ -335,14 +330,12 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled)
} }
} }
/* remove all waiting requests */ /* remove all waiting requests */
if (!list_empty(&dev->write_list.mei_cb.cb_list)) { list_for_each_entry_safe(cb_pos, cb_next,
list_for_each_entry_safe(cb_pos, cb_next, &dev->write_list.mei_cb.cb_list, cb_list) {
&dev->write_list.mei_cb.cb_list, cb_list) { if (cb_pos) {
if (cb_pos) { list_del(&cb_pos->cb_list);
list_del(&cb_pos->cb_list); mei_free_cb_private(cb_pos);
mei_free_cb_private(cb_pos); cb_pos = NULL;
cb_pos = NULL;
}
} }
} }
} }

227
drivers/staging/mei/interrupt.c
View file

@ -412,21 +412,20 @@ static void mei_client_connect_response(struct mei_device *dev,
dev->iamthif_state = MEI_IAMTHIF_IDLE; dev->iamthif_state = MEI_IAMTHIF_IDLE;
return; return;
} }
if (!list_empty(&dev->ctrl_rd_list.mei_cb.cb_list)) { list_for_each_entry_safe(cb_pos, cb_next,
list_for_each_entry_safe(cb_pos, cb_next, &dev->ctrl_rd_list.mei_cb.cb_list, cb_list) {
&dev->ctrl_rd_list.mei_cb.cb_list, cb_list) {
cl = (struct mei_cl *)cb_pos->file_private; cl = (struct mei_cl *)cb_pos->file_private;
if (!cl) { if (!cl) {
list_del(&cb_pos->cb_list);
return;
}
if (MEI_IOCTL == cb_pos->major_file_operations) {
if (is_treat_specially_client(cl, rs)) {
list_del(&cb_pos->cb_list); list_del(&cb_pos->cb_list);
return; cl->status = 0;
} cl->timer_count = 0;
if (MEI_IOCTL == cb_pos->major_file_operations) { break;
if (is_treat_specially_client(cl, rs)) {
list_del(&cb_pos->cb_list);
cl->status = 0;
cl->timer_count = 0;
break;
}
} }
} }
} }
@ -453,28 +452,26 @@ static void mei_client_disconnect_response(struct mei_device *dev,
rs->host_addr, rs->host_addr,
rs->status); rs->status);
if (!list_empty(&dev->ctrl_rd_list.mei_cb.cb_list)) { list_for_each_entry_safe(cb_pos, cb_next,
list_for_each_entry_safe(cb_pos, cb_next, &dev->ctrl_rd_list.mei_cb.cb_list, cb_list) {
&dev->ctrl_rd_list.mei_cb.cb_list, cb_list) { cl = (struct mei_cl *)cb_pos->file_private;
cl = (struct mei_cl *)cb_pos->file_private;
if (!cl) { if (!cl) {
list_del(&cb_pos->cb_list); list_del(&cb_pos->cb_list);
return; return;
} }
dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in ctrl_rd_list.\n"); dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in ctrl_rd_list.\n");
if (cl->host_client_id == rs->host_addr && if (cl->host_client_id == rs->host_addr &&
cl->me_client_id == rs->me_addr) { cl->me_client_id == rs->me_addr) {
list_del(&cb_pos->cb_list); list_del(&cb_pos->cb_list);
if (!rs->status) if (!rs->status)
cl->state = MEI_FILE_DISCONNECTED; cl->state = MEI_FILE_DISCONNECTED;
cl->status = 0; cl->status = 0;
cl->timer_count = 0; cl->timer_count = 0;
break; 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 *cl;
struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL; struct mei_cl_cb *pos = NULL, *next = NULL;
struct mei_io_list *list; struct mei_io_list *list;
int ret; int ret;
@ -1235,36 +1232,31 @@ 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"); dev_dbg(&dev->pdev->dev, "complete all waiting for write cb.\n");
list = &dev->write_waiting_list; list = &dev->write_waiting_list;
if (!list_empty(&list->mei_cb.cb_list)) { list_for_each_entry_safe(pos, next,
list_for_each_entry_safe(cb_pos, cb_next, &list->mei_cb.cb_list, cb_list) {
&list->mei_cb.cb_list, cb_list) { cl = (struct mei_cl *)pos->file_private;
cl = (struct mei_cl *)cb_pos->file_private; if (cl == NULL)
if (cl) { continue;
cl->status = 0;
list_del(&cb_pos->cb_list);
if (MEI_WRITING == cl->writing_state &&
(cb_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,
&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(
dev, slots);
if (ret)
return ret;
}
}
}
cl->status = 0;
list_del(&pos->cb_list);
if (MEI_WRITING == cl->writing_state &&
(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(&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(
dev, slots);
if (ret)
return ret;
}
} }
} }
@ -1312,24 +1304,24 @@ static int mei_irq_thread_write_handler(struct mei_io_list *cmpl_list,
/* complete control write list CB */ /* complete control write list CB */
dev_dbg(&dev->pdev->dev, "complete control write list cb.\n"); 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) { &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) { if (!cl) {
list_del(&cb_pos->cb_list); list_del(&pos->cb_list);
return -ENODEV; return -ENODEV;
} }
switch (cb_pos->major_file_operations) { switch (pos->major_file_operations) {
case MEI_CLOSE: case MEI_CLOSE:
/* send disconnect message */ /* 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) if (ret)
return ret; return ret;
break; break;
case MEI_READ: case MEI_READ:
/* send flow control message */ /* 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) if (ret)
return ret; return ret;
@ -1338,7 +1330,7 @@ static int mei_irq_thread_write_handler(struct mei_io_list *cmpl_list,
/* connect message */ /* connect message */
if (!mei_other_client_is_connecting(dev, cl)) if (!mei_other_client_is_connecting(dev, cl))
continue; 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) if (ret)
return ret; return ret;
@ -1350,53 +1342,49 @@ static int mei_irq_thread_write_handler(struct mei_io_list *cmpl_list,
} }
/* complete write list CB */ /* complete write list CB */
if (!list_empty(&dev->write_list.mei_cb.cb_list)) { dev_dbg(&dev->pdev->dev, "complete write list cb.\n");
dev_dbg(&dev->pdev->dev, "complete write list cb.\n"); list_for_each_entry_safe(pos, next,
list_for_each_entry_safe(cb_pos, cb_next, &dev->write_list.mei_cb.cb_list, cb_list) {
&dev->write_list.mei_cb.cb_list, cb_list) { cl = (struct mei_cl *)pos->file_private;
cl = (struct mei_cl *)cb_pos->file_private; if (cl == NULL)
continue;
if (cl) { if (cl != &dev->iamthif_cl) {
if (cl != &dev->iamthif_cl) { if (!mei_flow_ctrl_creds(dev, cl)) {
if (!mei_flow_ctrl_creds(dev, dev_dbg(&dev->pdev->dev,
cl)) { "No flow control"
dev_dbg(&dev->pdev->dev, " credentials for client"
"No flow control" " %d, not sending.\n",
" credentials for client" cl->host_client_id);
" %d, not sending.\n", continue;
cl->host_client_id);
continue;
}
ret = _mei_irq_thread_cmpl(dev, slots,
cb_pos,
cl, cmpl_list);
if (ret)
return ret;
} 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)) {
dev_dbg(&dev->pdev->dev,
"No flow control"
" credentials for amthi"
" client %d.\n",
cl->host_client_id);
continue;
}
ret = _mei_irq_thread_cmpl_iamthif(dev,
slots,
cb_pos,
cl,
cmpl_list);
if (ret)
return ret;
}
} }
ret = _mei_irq_thread_cmpl(dev, slots,
pos,
cl, cmpl_list);
if (ret)
return ret;
} 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)) {
dev_dbg(&dev->pdev->dev,
"No flow control"
" credentials for amthi"
" client %d.\n",
cl->host_client_id);
continue;
}
ret = _mei_irq_thread_cmpl_iamthif(dev,
slots,
pos,
cl,
cmpl_list);
if (ret)
return ret;
} }
} }
return 0; return 0;
} }
@ -1487,18 +1475,13 @@ void mei_timer(struct work_struct *work)
amthi_complete_list = &dev->amthi_read_complete_list. amthi_complete_list = &dev->amthi_read_complete_list.
mei_cb.cb_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, cl_pos = cb_pos->file_object->private_data;
amthi_complete_list,
cb_list) {
cl_pos = cb_pos->file_object->private_data; /* Finding the AMTHI entry. */
if (cl_pos == &dev->iamthif_cl)
/* Finding the AMTHI entry. */ list_del(&cb_pos->cb_list);
if (cl_pos == &dev->iamthif_cl)
list_del(&cb_pos->cb_list);
}
} }
if (dev->iamthif_current_cb) if (dev->iamthif_current_cb)
mei_free_cb_private(dev->iamthif_current_cb); mei_free_cb_private(dev->iamthif_current_cb);

50
drivers/staging/mei/iorw.c
View file

@ -228,17 +228,15 @@ struct mei_cl_cb *find_amthi_read_list_entry(
struct file *file) struct file *file)
{ {
struct mei_cl *cl_temp; struct mei_cl *cl_temp;
struct mei_cl_cb *cb_pos = NULL; struct mei_cl_cb *pos = NULL;
struct mei_cl_cb *cb_next = NULL; struct mei_cl_cb *next = NULL;
if (!list_empty(&dev->amthi_read_complete_list.mei_cb.cb_list)) { list_for_each_entry_safe(pos, next,
list_for_each_entry_safe(cb_pos, cb_next, &dev->amthi_read_complete_list.mei_cb.cb_list, cb_list) {
&dev->amthi_read_complete_list.mei_cb.cb_list, cb_list) { cl_temp = (struct mei_cl *)pos->file_private;
cl_temp = (struct mei_cl *)cb_pos->file_private; if (cl_temp && cl_temp == &dev->iamthif_cl &&
if (cl_temp && cl_temp == &dev->iamthif_cl && pos->file_object == file)
cb_pos->file_object == file) return pos;
return cb_pos;
}
} }
return NULL; 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) void mei_run_next_iamthif_cmd(struct mei_device *dev)
{ {
struct mei_cl *cl_tmp; struct mei_cl *cl_tmp;
struct mei_cl_cb *cb_pos = NULL; struct mei_cl_cb *pos = NULL;
struct mei_cl_cb *cb_next = NULL; struct mei_cl_cb *next = NULL;
int status; int status;
if (!dev) if (!dev)
@ -564,24 +562,22 @@ void mei_run_next_iamthif_cmd(struct mei_device *dev)
dev->iamthif_timer = 0; dev->iamthif_timer = 0;
dev->iamthif_file_object = NULL; 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");
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) { &dev->amthi_cmd_list.mei_cb.cb_list, cb_list) {
list_del(&cb_pos->cb_list); list_del(&pos->cb_list);
cl_tmp = (struct mei_cl *)cb_pos->file_private; cl_tmp = (struct mei_cl *)pos->file_private;
if (cl_tmp && cl_tmp == &dev->iamthif_cl) { if (cl_tmp && cl_tmp == &dev->iamthif_cl) {
status = amthi_write(dev, cb_pos); status = amthi_write(dev, pos);
if (status) { if (status) {
dev_dbg(&dev->pdev->dev, dev_dbg(&dev->pdev->dev,
"amthi write failed status = %d\n", "amthi write failed status = %d\n",
status); status);
return; return;
}
break;
} }
break;
} }
} }
} }

21
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_device *dev,
struct mei_cl *cl) struct mei_cl *cl)
{ {
struct mei_cl_cb *cb_pos = NULL; struct mei_cl_cb *pos = NULL;
struct mei_cl_cb *cb_next = NULL; struct mei_cl_cb *next = NULL;
if (!list_empty(&dev->read_list.mei_cb.cb_list)) { dev_dbg(&dev->pdev->dev, "remove read_list CB\n");
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 *)pos->file_private;
dev_dbg(&dev->pdev->dev, "remove read_list CB\n"); if (mei_cl_cmp_id(cl, cl_temp))
list_for_each_entry_safe(cb_pos, cb_next, return pos;
&dev->read_list.mei_cb.cb_list, cb_list) {
struct mei_cl *cl_temp;
cl_temp = (struct mei_cl *)cb_pos->file_private;
if (mei_cl_cmp_id(cl, cl_temp))
return cb_pos;
}
} }
return NULL; return NULL;
} }