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Date: Mon, 3 Jan 2011 14:49:34 +0100
From: Tejun Heo <tj@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: Tejun Heo <tj@...nel.org>, Andy Walls <awalls@...metrocast.net>,
linux-media@...r.kernel.org
Subject: [PATCH 11/32] v4l/cx18: update workqueue usage
With cmwq, there's no reason to use separate out_work_queue. Drop it
and use system_wq instead. The in_work_queue needs to be ordered so
can't use one of the system wqs; however, as it isn't used to reclaim
memory, allocate the workqueue with alloc_ordered_workqueue() without
WQ_MEM_RECLAIM.
Signed-off-by: Tejun Heo <tj@...nel.org>
Cc: Andy Walls <awalls@...metrocast.net>
Cc: linux-media@...r.kernel.org
---
Only compile tested. Please feel free to take it into the subsystem
tree or simply ack - I'll route it through the wq tree.
Thanks.
drivers/media/video/cx18/cx18-driver.c | 24 ++----------------------
drivers/media/video/cx18/cx18-driver.h | 3 ---
drivers/media/video/cx18/cx18-streams.h | 3 +--
3 files changed, 3 insertions(+), 27 deletions(-)
diff --git a/drivers/media/video/cx18/cx18-driver.c b/drivers/media/video/cx18/cx18-driver.c
index df60f27..41c0822 100644
--- a/drivers/media/video/cx18/cx18-driver.c
+++ b/drivers/media/video/cx18/cx18-driver.c
@@ -656,7 +656,7 @@ static int __devinit cx18_create_in_workq(struct cx18 *cx)
{
snprintf(cx->in_workq_name, sizeof(cx->in_workq_name), "%s-in",
cx->v4l2_dev.name);
- cx->in_work_queue = create_singlethread_workqueue(cx->in_workq_name);
+ cx->in_work_queue = alloc_ordered_workqueue(cx->in_workq_name, 0);
if (cx->in_work_queue == NULL) {
CX18_ERR("Unable to create incoming mailbox handler thread\n");
return -ENOMEM;
@@ -664,18 +664,6 @@ static int __devinit cx18_create_in_workq(struct cx18 *cx)
return 0;
}
-static int __devinit cx18_create_out_workq(struct cx18 *cx)
-{
- snprintf(cx->out_workq_name, sizeof(cx->out_workq_name), "%s-out",
- cx->v4l2_dev.name);
- cx->out_work_queue = create_workqueue(cx->out_workq_name);
- if (cx->out_work_queue == NULL) {
- CX18_ERR("Unable to create outgoing mailbox handler threads\n");
- return -ENOMEM;
- }
- return 0;
-}
-
static void __devinit cx18_init_in_work_orders(struct cx18 *cx)
{
int i;
@@ -702,15 +690,9 @@ static int __devinit cx18_init_struct1(struct cx18 *cx)
mutex_init(&cx->epu2apu_mb_lock);
mutex_init(&cx->epu2cpu_mb_lock);
- ret = cx18_create_out_workq(cx);
- if (ret)
- return ret;
-
ret = cx18_create_in_workq(cx);
- if (ret) {
- destroy_workqueue(cx->out_work_queue);
+ if (ret)
return ret;
- }
cx18_init_in_work_orders(cx);
@@ -1094,7 +1076,6 @@ free_mem:
release_mem_region(cx->base_addr, CX18_MEM_SIZE);
free_workqueues:
destroy_workqueue(cx->in_work_queue);
- destroy_workqueue(cx->out_work_queue);
err:
if (retval == 0)
retval = -ENODEV;
@@ -1244,7 +1225,6 @@ static void cx18_remove(struct pci_dev *pci_dev)
cx18_halt_firmware(cx);
destroy_workqueue(cx->in_work_queue);
- destroy_workqueue(cx->out_work_queue);
cx18_streams_cleanup(cx, 1);
diff --git a/drivers/media/video/cx18/cx18-driver.h b/drivers/media/video/cx18/cx18-driver.h
index 77be58c..f7f71d1 100644
--- a/drivers/media/video/cx18/cx18-driver.h
+++ b/drivers/media/video/cx18/cx18-driver.h
@@ -614,9 +614,6 @@ struct cx18 {
struct cx18_in_work_order in_work_order[CX18_MAX_IN_WORK_ORDERS];
char epu_debug_str[256]; /* CX18_EPU_DEBUG is rare: use shared space */
- struct workqueue_struct *out_work_queue;
- char out_workq_name[12]; /* "cx18-NN-out" */
-
/* i2c */
struct i2c_adapter i2c_adap[2];
struct i2c_algo_bit_data i2c_algo[2];
diff --git a/drivers/media/video/cx18/cx18-streams.h b/drivers/media/video/cx18/cx18-streams.h
index 77412be..5837ffb 100644
--- a/drivers/media/video/cx18/cx18-streams.h
+++ b/drivers/media/video/cx18/cx18-streams.h
@@ -41,8 +41,7 @@ static inline bool cx18_stream_enabled(struct cx18_stream *s)
/* Related to submission of mdls to firmware */
static inline void cx18_stream_load_fw_queue(struct cx18_stream *s)
{
- struct cx18 *cx = s->cx;
- queue_work(cx->out_work_queue, &s->out_work_order);
+ schedule_work(&s->out_work_order);
}
static inline void cx18_stream_put_mdl_fw(struct cx18_stream *s,
--
1.7.1
--
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