Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=475d5263114d55eb9024e6ab4b6ea74e28386970
Commit: 475d5263114d55eb9024e6ab4b6ea74e28386970
Parent: 3bcc95760c9ee7adb8509173b78914339baa7f4f
Author: Jiri Slaby <[EMAIL PROTECTED]>
AuthorDate: Mon Oct 15 13:07:30 2007 -0300
Committer: Mauro Carvalho Chehab <[EMAIL PROTECTED]>
CommitDate: Mon Oct 22 12:01:31 2007 -0200
V4L/DVB (6323): V4L: cinergyT2, remove bad usage of ERESTARTSYS
cinergyT2, remove bad usage of ERESTARTSYS
test of cinergyt2->disconnect_pending doesn't ensure pending signal and so
ERESTARTSYS would reach userspace, which is not permitted. Change it to
EAGAIN.
Signed-off-by: Jiri Slaby <[EMAIL PROTECTED]>
Signed-off-by: Mauro Carvalho Chehab <[EMAIL PROTECTED]>
---
drivers/media/dvb/cinergyT2/cinergyT2.c | 42 +++++++++++++++++++++---------
1 files changed, 29 insertions(+), 13 deletions(-)
diff --git a/drivers/media/dvb/cinergyT2/cinergyT2.c
b/drivers/media/dvb/cinergyT2/cinergyT2.c
index a05e5c1..db08b0a 100644
--- a/drivers/media/dvb/cinergyT2/cinergyT2.c
+++ b/drivers/media/dvb/cinergyT2/cinergyT2.c
@@ -345,7 +345,9 @@ static int cinergyt2_start_feed(struct dvb_demux_feed
*dvbdmxfeed)
struct dvb_demux *demux = dvbdmxfeed->demux;
struct cinergyt2 *cinergyt2 = demux->priv;
- if (cinergyt2->disconnect_pending ||
mutex_lock_interruptible(&cinergyt2->sem))
+ if (cinergyt2->disconnect_pending)
+ return -EAGAIN;
+ if (mutex_lock_interruptible(&cinergyt2->sem))
return -ERESTARTSYS;
if (cinergyt2->streaming == 0)
@@ -361,7 +363,9 @@ static int cinergyt2_stop_feed(struct dvb_demux_feed
*dvbdmxfeed)
struct dvb_demux *demux = dvbdmxfeed->demux;
struct cinergyt2 *cinergyt2 = demux->priv;
- if (cinergyt2->disconnect_pending ||
mutex_lock_interruptible(&cinergyt2->sem))
+ if (cinergyt2->disconnect_pending)
+ return -EAGAIN;
+ if (mutex_lock_interruptible(&cinergyt2->sem))
return -ERESTARTSYS;
if (--cinergyt2->streaming == 0)
@@ -481,12 +485,16 @@ static int cinergyt2_open (struct inode *inode, struct
file *file)
{
struct dvb_device *dvbdev = file->private_data;
struct cinergyt2 *cinergyt2 = dvbdev->priv;
- int err = -ERESTARTSYS;
+ int err = -EAGAIN;
- if (cinergyt2->disconnect_pending ||
mutex_lock_interruptible(&cinergyt2->wq_sem))
+ if (cinergyt2->disconnect_pending)
+ goto out;
+ err = mutex_lock_interruptible(&cinergyt2->wq_sem);
+ if (err)
goto out;
- if (mutex_lock_interruptible(&cinergyt2->sem))
+ err = mutex_lock_interruptible(&cinergyt2->sem);
+ if (err)
goto out_unlock1;
if ((err = dvb_generic_open(inode, file)))
@@ -550,7 +558,9 @@ static unsigned int cinergyt2_poll (struct file *file,
struct poll_table_struct
struct cinergyt2 *cinergyt2 = dvbdev->priv;
unsigned int mask = 0;
- if (cinergyt2->disconnect_pending ||
mutex_lock_interruptible(&cinergyt2->sem))
+ if (cinergyt2->disconnect_pending)
+ return -EAGAIN;
+ if (mutex_lock_interruptible(&cinergyt2->sem))
return -ERESTARTSYS;
poll_wait(file, &cinergyt2->poll_wq, wait);
@@ -625,7 +635,9 @@ static int cinergyt2_ioctl (struct inode *inode, struct
file *file,
if (copy_from_user(&p, (void __user*) arg, sizeof(p)))
return -EFAULT;
- if (cinergyt2->disconnect_pending ||
mutex_lock_interruptible(&cinergyt2->sem))
+ if (cinergyt2->disconnect_pending)
+ return -EAGAIN;
+ if (mutex_lock_interruptible(&cinergyt2->sem))
return -ERESTARTSYS;
param->cmd = CINERGYT2_EP1_SET_TUNER_PARAMETERS;
@@ -996,7 +1008,9 @@ static int cinergyt2_suspend (struct usb_interface *intf,
pm_message_t state)
{
struct cinergyt2 *cinergyt2 = usb_get_intfdata (intf);
- if (cinergyt2->disconnect_pending ||
mutex_lock_interruptible(&cinergyt2->wq_sem))
+ if (cinergyt2->disconnect_pending)
+ return -EAGAIN;
+ if (mutex_lock_interruptible(&cinergyt2->wq_sem))
return -ERESTARTSYS;
cinergyt2_suspend_rc(cinergyt2);
@@ -1017,16 +1031,18 @@ static int cinergyt2_resume (struct usb_interface *intf)
{
struct cinergyt2 *cinergyt2 = usb_get_intfdata (intf);
struct dvbt_set_parameters_msg *param = &cinergyt2->param;
- int err = -ERESTARTSYS;
+ int err = -EAGAIN;
- if (cinergyt2->disconnect_pending ||
mutex_lock_interruptible(&cinergyt2->wq_sem))
+ if (cinergyt2->disconnect_pending)
+ goto out;
+ err = mutex_lock_interruptible(&cinergyt2->wq_sem);
+ if (err)
goto out;
- if (mutex_lock_interruptible(&cinergyt2->sem))
+ err = mutex_lock_interruptible(&cinergyt2->sem);
+ if (err)
goto out_unlock1;
- err = 0;
-
if (!cinergyt2->sleeping) {
cinergyt2_sleep(cinergyt2, 0);
cinergyt2_command(cinergyt2, (char *) param, sizeof(*param),
NULL, 0);
-
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