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Date: Wed, 18 Jul 2012 21:29:11 -0700
From: Andres Salomon <dilinger@...ued.net>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Paul Fox <pgf@...top.org>, Daniel Drake <dsd@...top.org>,
"Richard A. Smith" <richard@...top.org>,
linux-kernel@...r.kernel.org, libertas-dev@...ts.infradead.org,
linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
platform-driver-x86@...r.kernel.org, devel@...verdev.osuosl.org,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
Dan Williams <dcbw@...hat.com>,
"John W. Linville" <linville@...driver.com>,
Matthew Garrett <mjg@...hat.com>,
Anton Vorontsov <cbou@...l.ru>,
David Woodhouse <dwmw2@...radead.org>,
Chris Ball <cjb@...top.org>,
Jon Nettleton <jon.nettleton@...il.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH 8/9] Platform: OLPC: move global variables into priv struct
Populate olpc_ec_priv.
Signed-off-by: Andres Salomon <dilinger@...ued.net>
---
drivers/platform/olpc/olpc-ec.c | 48
++++++++++++++++++++++---------------- 1 files changed, 28
insertions(+), 20 deletions(-)
diff --git a/drivers/platform/olpc/olpc-ec.c
b/drivers/platform/olpc/olpc-ec.c index 1a15a79..0f9f859 100644
--- a/drivers/platform/olpc/olpc-ec.c
+++ b/drivers/platform/olpc/olpc-ec.c
@@ -31,6 +31,12 @@ struct ec_cmd_desc {
struct olpc_ec_priv {
struct olpc_ec_driver *drv;
+ struct work_struct worker;
+ struct mutex cmd_lock;
+
+ /* Pending EC commands */
+ struct list_head cmd_q;
+ spinlock_t cmd_q_lock;
struct dentry *dbgfs_dir;
@@ -46,16 +52,9 @@ struct olpc_ec_priv {
bool suspended;
};
-static void olpc_ec_worker(struct work_struct *w);
-
-static DECLARE_WORK(ec_worker, olpc_ec_worker);
-static LIST_HEAD(ec_cmd_q);
-static DEFINE_SPINLOCK(ec_cmd_q_lock);
-
static struct olpc_ec_driver *ec_driver;
static struct olpc_ec_priv *ec_priv;
static void *ec_cb_arg;
-static DEFINE_MUTEX(ec_cb_lock);
void olpc_ec_driver_register(struct olpc_ec_driver *drv, void *arg)
{
@@ -66,49 +65,51 @@ EXPORT_SYMBOL_GPL(olpc_ec_driver_register);
static void olpc_ec_worker(struct work_struct *w)
{
+ struct olpc_ec_priv *ec = container_of(w, struct olpc_ec_priv,
worker); struct ec_cmd_desc *desc = NULL;
unsigned long flags;
/* Grab the first pending command from the queue */
- spin_lock_irqsave(&ec_cmd_q_lock, flags);
- if (!list_empty(&ec_cmd_q)) {
- desc = list_first_entry(&ec_cmd_q, struct ec_cmd_desc,
node);
+ spin_lock_irqsave(&ec->cmd_q_lock, flags);
+ if (!list_empty(&ec->cmd_q)) {
+ desc = list_first_entry(&ec->cmd_q, struct
ec_cmd_desc, node); list_del(&desc->node);
}
- spin_unlock_irqrestore(&ec_cmd_q_lock, flags);
+ spin_unlock_irqrestore(&ec->cmd_q_lock, flags);
/* Do we actually have anything to do? */
if (!desc)
return;
/* Protect the EC hw with a mutex; only run one cmd at a time
*/
- mutex_lock(&ec_cb_lock);
+ mutex_lock(&ec->cmd_lock);
desc->err = ec_driver->ec_cmd(desc->cmd, desc->inbuf,
desc->inlen, desc->outbuf, desc->outlen, ec_cb_arg);
- mutex_unlock(&ec_cb_lock);
+ mutex_unlock(&ec->cmd_lock);
/* Finished, wake up olpc_ec_cmd() */
complete(&desc->finished);
/* Run the worker thread again in case there are more cmds
pending */
- schedule_work(&ec_worker);
+ schedule_work(&ec->worker);
}
/*
* Throw a cmd descripter onto the list. We now have SMP OLPC
machines, so
* locking is pretty critical.
*/
-static void queue_ec_descriptor(struct ec_cmd_desc *desc)
+static void queue_ec_descriptor(struct ec_cmd_desc *desc,
+ struct olpc_ec_priv *ec)
{
unsigned long flags;
INIT_LIST_HEAD(&desc->node);
- spin_lock_irqsave(&ec_cmd_q_lock, flags);
- list_add_tail(&desc->node, &ec_cmd_q);
- spin_unlock_irqrestore(&ec_cmd_q_lock, flags);
+ spin_lock_irqsave(&ec->cmd_q_lock, flags);
+ list_add_tail(&desc->node, &ec->cmd_q);
+ spin_unlock_irqrestore(&ec->cmd_q_lock, flags);
- schedule_work(&ec_worker);
+ schedule_work(&ec->worker);
}
int olpc_ec_cmd(u8 cmd, u8 *inbuf, size_t inlen, u8 *outbuf, size_t
outlen) @@ -137,7 +138,7 @@ int olpc_ec_cmd(u8 cmd, u8 *inbuf, size_t
inlen, u8 *outbuf, size_t outlen) desc.err = 0;
init_completion(&desc.finished);
- queue_ec_descriptor(&desc);
+ queue_ec_descriptor(&desc, ec);
/* Timeouts must be handled in the platform-specific EC hook */
wait_for_completion(&desc.finished);
@@ -266,7 +267,14 @@ static int olpc_ec_probe(struct platform_device
*pdev) ec = kzalloc(sizeof(*ec), GFP_KERNEL);
if (!ec)
return -ENOMEM;
+
ec->drv = ec_driver;
+ INIT_WORK(&ec->worker, olpc_ec_worker);
+ mutex_init(&ec->cmd_lock);
+
+ INIT_LIST_HEAD(&ec->cmd_q);
+ spin_lock_init(&ec->cmd_q_lock);
+
ec_priv = ec;
platform_set_drvdata(pdev, ec);
--
1.7.2.5
--
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