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i2c: i801: Use wait_event_timeout to wait for interrupts 

Some systems have been reported to have trouble with interrupts. Use
wait_event_timeout() instead of wait_event() so we don't get stuck in
that case, and log the problem.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Jean Delvare 2014-11-12 10:20:40 +01:00 committed by Wolfram Sang
parent 0285f8f5fd
commit b3b8df9772
1 changed files with 22 additions and 3 deletions
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25
drivers/i2c/busses/i2c-i801.c
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@ -2,7 +2,7 @@
Copyright (c) 1998 - 2002 Frodo Looijaard <frodol@dds.nl>,
Philip Edelbrock <phil@netroedge.com>, and Mark D. Studebaker
<mdsxyz123@yahoo.com>
Copyright (C) 2007 - 2012 Jean Delvare <jdelvare@suse.de>
Copyright (C) 2007 - 2014 Jean Delvare <jdelvare@suse.de>
Copyright (C) 2010 Intel Corporation,
David Woodhouse <dwmw2@infradead.org>
@ -371,6 +371,7 @@ static int i801_transaction(struct i801_priv *priv, int xact)
{
int status;
int result;
const struct i2c_adapter *adap = &priv->adapter;
result = i801_check_pre(priv);
if (result < 0)
@ -379,7 +380,14 @@ static int i801_transaction(struct i801_priv *priv, int xact)
if (priv->features & FEATURE_IRQ) {
outb_p(xact | SMBHSTCNT_INTREN | SMBHSTCNT_START,
SMBHSTCNT(priv));
wait_event(priv->waitq, (status = priv->status));
result = wait_event_timeout(priv->waitq,
(status = priv->status),
adap->timeout);
if (!result) {
status = -ETIMEDOUT;
dev_warn(&priv->pci_dev->dev,
"Timeout waiting for interrupt!\n");
}
priv->status = 0;
return i801_check_post(priv, status);
}
@ -527,6 +535,7 @@ static int i801_block_transaction_byte_by_byte(struct i801_priv *priv,
int smbcmd;
int status;
int result;
const struct i2c_adapter *adap = &priv->adapter;
result = i801_check_pre(priv);
if (result < 0)
@ -555,7 +564,14 @@ static int i801_block_transaction_byte_by_byte(struct i801_priv *priv,
priv->data = &data->block[1];
outb_p(priv->cmd | SMBHSTCNT_START, SMBHSTCNT(priv));
wait_event(priv->waitq, (status = priv->status));
result = wait_event_timeout(priv->waitq,
(status = priv->status),
adap->timeout);
if (!result) {
status = -ETIMEDOUT;
dev_warn(&priv->pci_dev->dev,
"Timeout waiting for interrupt!\n");
}
priv->status = 0;
return i801_check_post(priv, status);
}
@ -1212,6 +1228,9 @@ static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id)
outb_p(inb_p(SMBAUXCTL(priv)) &
~(SMBAUXCTL_CRC | SMBAUXCTL_E32B), SMBAUXCTL(priv));
/* Default timeout in interrupt mode: 200 ms */
priv->adapter.timeout = HZ / 5;
if (priv->features & FEATURE_IRQ) {
init_waitqueue_head(&priv->waitq);