mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 21:57:43 +00:00
i2c: i801: Replace waitqueue with completion API
Using the completion API is more intuitive and it allows to simplify the code. Note that we don't have to set priv->status = 0 any longer with the completion API. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Tested-by: Jean Delvare <jdelvare@suse.de> Reviewed-by: Daniel Kurtz <djkurtz@chromium.org> Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
parent
78f420acc4
commit
1de93d5d52
1 changed files with 19 additions and 29 deletions
|
@ -103,7 +103,7 @@
|
|||
#include <linux/dmi.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/wait.h>
|
||||
#include <linux/completion.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/platform_data/itco_wdt.h>
|
||||
|
@ -270,7 +270,7 @@ struct i801_priv {
|
|||
unsigned int features;
|
||||
|
||||
/* isr processing */
|
||||
wait_queue_head_t waitq;
|
||||
struct completion done;
|
||||
u8 status;
|
||||
|
||||
/* Command state used by isr for byte-by-byte block transactions */
|
||||
|
@ -496,24 +496,19 @@ static int i801_wait_byte_done(struct i801_priv *priv)
|
|||
static int i801_transaction(struct i801_priv *priv, int xact)
|
||||
{
|
||||
int status;
|
||||
int result;
|
||||
unsigned long result;
|
||||
const struct i2c_adapter *adap = &priv->adapter;
|
||||
|
||||
result = i801_check_pre(priv);
|
||||
if (result < 0)
|
||||
return result;
|
||||
status = i801_check_pre(priv);
|
||||
if (status < 0)
|
||||
return status;
|
||||
|
||||
if (priv->features & FEATURE_IRQ) {
|
||||
reinit_completion(&priv->done);
|
||||
outb_p(xact | SMBHSTCNT_INTREN | SMBHSTCNT_START,
|
||||
SMBHSTCNT(priv));
|
||||
result = wait_event_timeout(priv->waitq,
|
||||
(status = priv->status),
|
||||
adap->timeout);
|
||||
if (!result)
|
||||
status = -ETIMEDOUT;
|
||||
|
||||
priv->status = 0;
|
||||
return i801_check_post(priv, status);
|
||||
result = wait_for_completion_timeout(&priv->done, adap->timeout);
|
||||
return i801_check_post(priv, result ? priv->status : -ETIMEDOUT);
|
||||
}
|
||||
|
||||
/* the current contents of SMBHSTCNT can be overwritten, since PEC,
|
||||
|
@ -638,7 +633,7 @@ static irqreturn_t i801_host_notify_isr(struct i801_priv *priv)
|
|||
* DEV_ERR - Invalid command, NAK or communication timeout
|
||||
* BUS_ERR - SMI# transaction collision
|
||||
* FAILED - transaction was canceled due to a KILL request
|
||||
* When any of these occur, update ->status and wake up the waitq.
|
||||
* When any of these occur, update ->status and signal completion.
|
||||
* ->status must be cleared before kicking off the next transaction.
|
||||
*
|
||||
* 2) For byte-by-byte (I2C read/write) transactions, one BYTE_DONE interrupt
|
||||
|
@ -675,7 +670,7 @@ static irqreturn_t i801_isr(int irq, void *dev_id)
|
|||
if (status) {
|
||||
outb_p(status, SMBHSTSTS(priv));
|
||||
priv->status = status;
|
||||
wake_up(&priv->waitq);
|
||||
complete(&priv->done);
|
||||
}
|
||||
|
||||
return IRQ_HANDLED;
|
||||
|
@ -694,15 +689,15 @@ static int i801_block_transaction_byte_by_byte(struct i801_priv *priv,
|
|||
int i, len;
|
||||
int smbcmd;
|
||||
int status;
|
||||
int result;
|
||||
unsigned long result;
|
||||
const struct i2c_adapter *adap = &priv->adapter;
|
||||
|
||||
if (command == I2C_SMBUS_BLOCK_PROC_CALL)
|
||||
return -EOPNOTSUPP;
|
||||
|
||||
result = i801_check_pre(priv);
|
||||
if (result < 0)
|
||||
return result;
|
||||
status = i801_check_pre(priv);
|
||||
if (status < 0)
|
||||
return status;
|
||||
|
||||
len = data->block[0];
|
||||
|
||||
|
@ -726,15 +721,10 @@ static int i801_block_transaction_byte_by_byte(struct i801_priv *priv,
|
|||
priv->count = 0;
|
||||
priv->data = &data->block[1];
|
||||
|
||||
reinit_completion(&priv->done);
|
||||
outb_p(priv->cmd | SMBHSTCNT_START, SMBHSTCNT(priv));
|
||||
result = wait_event_timeout(priv->waitq,
|
||||
(status = priv->status),
|
||||
adap->timeout);
|
||||
if (!result)
|
||||
status = -ETIMEDOUT;
|
||||
|
||||
priv->status = 0;
|
||||
return i801_check_post(priv, status);
|
||||
result = wait_for_completion_timeout(&priv->done, adap->timeout);
|
||||
return i801_check_post(priv, result ? priv->status : -ETIMEDOUT);
|
||||
}
|
||||
|
||||
for (i = 1; i <= len; i++) {
|
||||
|
@ -1889,7 +1879,7 @@ static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id)
|
|||
}
|
||||
|
||||
if (priv->features & FEATURE_IRQ) {
|
||||
init_waitqueue_head(&priv->waitq);
|
||||
init_completion(&priv->done);
|
||||
|
||||
err = devm_request_irq(&dev->dev, dev->irq, i801_isr,
|
||||
IRQF_SHARED,
|
||||
|
|
Loading…
Reference in a new issue