* [PATCH] unlock 12c_mutex before return
@ 2007-10-23 0:00 Roel Kluin
2007-10-23 0:06 ` Roel Kluin
2007-10-23 9:50 ` Andreas Schwab
0 siblings, 2 replies; 4+ messages in thread
From: Roel Kluin @ 2007-10-23 0:00 UTC (permalink / raw)
To: lkml
unlock 12c_mutex before return -EINVAL
Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
---
diff --git a/drivers/media/dvb/dvb-usb/au6610.c b/drivers/media/dvb/dvb-usb/au6610.c
index 18e0b16..31f47c7 100644
--- a/drivers/media/dvb/dvb-usb/au6610.c
+++ b/drivers/media/dvb/dvb-usb/au6610.c
@@ -82,8 +82,10 @@ static int au6610_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
return -EAGAIN;
- if (num > 2)
+ if (num > 2) {
+ mutex_unlock(&d->i2c_mutex);
return -EINVAL;
+ }
for (i = 0; i < num; i++) {
/* write/read request */
^ permalink raw reply related [flat|nested] 4+ messages in thread* Re: [PATCH] unlock 12c_mutex before return
2007-10-23 0:00 [PATCH] unlock 12c_mutex before return Roel Kluin
@ 2007-10-23 0:06 ` Roel Kluin
2007-10-23 9:50 ` Andreas Schwab
1 sibling, 0 replies; 4+ messages in thread
From: Roel Kluin @ 2007-10-23 0:06 UTC (permalink / raw)
To: lkml
And a similar one in drivers/media/dvb/dvb-usb/gl861.c
--
unlock 12c_mutex before return -EINVAL
Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
---
diff --git a/drivers/media/dvb/dvb-usb/gl861.c b/drivers/media/dvb/dvb-usb/gl861.c
index f01d99c..20c340a 100644
--- a/drivers/media/dvb/dvb-usb/gl861.c
+++ b/drivers/media/dvb/dvb-usb/gl861.c
@@ -59,8 +59,10 @@ static int gl861_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
return -EAGAIN;
- if (num > 2)
+ if (num > 2) {
+ mutex_unlock(&d->i2c_mutex);
return -EINVAL;
+ }
for (i = 0; i < num; i++) {
/* write/read request */
^ permalink raw reply related [flat|nested] 4+ messages in thread* Re: [PATCH] unlock 12c_mutex before return
2007-10-23 0:00 [PATCH] unlock 12c_mutex before return Roel Kluin
2007-10-23 0:06 ` Roel Kluin
@ 2007-10-23 9:50 ` Andreas Schwab
2007-10-23 12:32 ` Roel Kluin
1 sibling, 1 reply; 4+ messages in thread
From: Andreas Schwab @ 2007-10-23 9:50 UTC (permalink / raw)
To: Roel Kluin; +Cc: lkml
Roel Kluin <12o3l@tiscali.nl> writes:
> unlock 12c_mutex before return -EINVAL
>
> Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
> ---
> diff --git a/drivers/media/dvb/dvb-usb/au6610.c b/drivers/media/dvb/dvb-usb/au6610.c
> index 18e0b16..31f47c7 100644
> --- a/drivers/media/dvb/dvb-usb/au6610.c
> +++ b/drivers/media/dvb/dvb-usb/au6610.c
> @@ -82,8 +82,10 @@ static int au6610_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
> if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
> return -EAGAIN;
>
> - if (num > 2)
> + if (num > 2) {
> + mutex_unlock(&d->i2c_mutex);
> return -EINVAL;
How about moving the check before the lock?
Andreas.
--
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
PGP key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH] unlock 12c_mutex before return
2007-10-23 9:50 ` Andreas Schwab
@ 2007-10-23 12:32 ` Roel Kluin
0 siblings, 0 replies; 4+ messages in thread
From: Roel Kluin @ 2007-10-23 12:32 UTC (permalink / raw)
To: Andreas Schwab; +Cc: lkml
Andreas Schwab wrote:
>> - if (num > 2)
>> + if (num > 2) {
>> + mutex_unlock(&d->i2c_mutex);
>> return -EINVAL;
>
> How about moving the check before the lock?
Good suggestion. Patch below covers both previous patches.
--
Move check before lock
Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
---
diff --git a/drivers/media/dvb/dvb-usb/au6610.c b/drivers/media/dvb/dvb-usb/au6610.c
index 18e0b16..f3ff813 100644
--- a/drivers/media/dvb/dvb-usb/au6610.c
+++ b/drivers/media/dvb/dvb-usb/au6610.c
@@ -79,12 +79,12 @@ static int au6610_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
struct dvb_usb_device *d = i2c_get_adapdata(adap);
int i;
- if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
- return -EAGAIN;
-
if (num > 2)
return -EINVAL;
+ if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
+ return -EAGAIN;
+
for (i = 0; i < num; i++) {
/* write/read request */
if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
diff --git a/drivers/media/dvb/dvb-usb/gl861.c b/drivers/media/dvb/dvb-usb/gl861.c
index f01d99c..6b99d9f 100644
--- a/drivers/media/dvb/dvb-usb/gl861.c
+++ b/drivers/media/dvb/dvb-usb/gl861.c
@@ -56,12 +56,12 @@ static int gl861_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
struct dvb_usb_device *d = i2c_get_adapdata(adap);
int i;
- if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
- return -EAGAIN;
-
if (num > 2)
return -EINVAL;
+ if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
+ return -EAGAIN;
+
for (i = 0; i < num; i++) {
/* write/read request */
if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
^ permalink raw reply related [flat|nested] 4+ messages in thread
end of thread, other threads:[~2007-10-23 12:32 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2007-10-23 0:00 [PATCH] unlock 12c_mutex before return Roel Kluin
2007-10-23 0:06 ` Roel Kluin
2007-10-23 9:50 ` Andreas Schwab
2007-10-23 12:32 ` Roel Kluin
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