diff options
| author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-07-30 20:00:44 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-07-30 20:00:44 -0300 |
| commit | e523ddb42e0588210df880e0e32f0de801803e94 (patch) | |
| tree | 94f37cdcb052dc091173d9882a69cb58359b2f01 /linux | |
| parent | b790d1d65f747cf5694a44470f45539c42859b0e (diff) | |
| download | mediapointer-dvb-s2-e523ddb42e0588210df880e0e32f0de801803e94.tar.gz mediapointer-dvb-s2-e523ddb42e0588210df880e0e32f0de801803e94.tar.bz2 | |
hdpvr: fix lock imbalances
From: Jiri Slaby <jirislaby@gmail.com>
There are many lock imbalances in this driver. Fix all found.
Priority: normal
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'linux')
| -rw-r--r-- | linux/drivers/media/video/hdpvr/hdpvr-core.c | 12 | ||||
| -rw-r--r-- | linux/drivers/media/video/hdpvr/hdpvr-video.c | 6 |
2 files changed, 10 insertions, 8 deletions
diff --git a/linux/drivers/media/video/hdpvr/hdpvr-core.c b/linux/drivers/media/video/hdpvr/hdpvr-core.c index 188bd5aea..1c9bc94c9 100644 --- a/linux/drivers/media/video/hdpvr/hdpvr-core.c +++ b/linux/drivers/media/video/hdpvr/hdpvr-core.c @@ -126,7 +126,7 @@ static int device_authorization(struct hdpvr_device *dev) char *print_buf = kzalloc(5*buf_size+1, GFP_KERNEL); if (!print_buf) { v4l2_err(&dev->v4l2_dev, "Out of memory\n"); - goto error; + return retval; } #endif @@ -140,7 +140,7 @@ static int device_authorization(struct hdpvr_device *dev) if (ret != 46) { v4l2_err(&dev->v4l2_dev, "unexpected answer of status request, len %d\n", ret); - goto error; + goto unlock; } #ifdef HDPVR_DEBUG else { @@ -163,7 +163,7 @@ static int device_authorization(struct hdpvr_device *dev) v4l2_err(&dev->v4l2_dev, "unknown firmware version 0x%x\n", dev->usbc_buf[1]); ret = -EINVAL; - goto error; + goto unlock; } response = dev->usbc_buf+38; @@ -188,10 +188,10 @@ static int device_authorization(struct hdpvr_device *dev) 10000); v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, "magic request returned %d\n", ret); - mutex_unlock(&dev->usbc_mutex); retval = ret != 8; -error: +unlock: + mutex_unlock(&dev->usbc_mutex); return retval; } @@ -350,6 +350,7 @@ static int hdpvr_probe(struct usb_interface *interface, mutex_lock(&dev->io_mutex); if (hdpvr_alloc_buffers(dev, NUM_BUFFERS)) { + mutex_unlock(&dev->io_mutex); v4l2_err(&dev->v4l2_dev, "allocating transfer buffers failed\n"); goto error; @@ -381,7 +382,6 @@ static int hdpvr_probe(struct usb_interface *interface, error: if (dev) { - mutex_unlock(&dev->io_mutex); /* this frees allocated memory */ hdpvr_delete(dev); } diff --git a/linux/drivers/media/video/hdpvr/hdpvr-video.c b/linux/drivers/media/video/hdpvr/hdpvr-video.c index ccd47f57f..5937de23c 100644 --- a/linux/drivers/media/video/hdpvr/hdpvr-video.c +++ b/linux/drivers/media/video/hdpvr/hdpvr-video.c @@ -375,6 +375,7 @@ static int hdpvr_open(struct file *file) * in resumption */ mutex_lock(&dev->io_mutex); dev->open_count++; + mutex_unlock(&dev->io_mutex); fh->dev = dev; @@ -383,7 +384,6 @@ static int hdpvr_open(struct file *file) retval = 0; err: - mutex_unlock(&dev->io_mutex); return retval; } @@ -519,8 +519,10 @@ static unsigned int hdpvr_poll(struct file *filp, poll_table *wait) mutex_lock(&dev->io_mutex); - if (video_is_unregistered(dev->video_dev)) + if (video_is_unregistered(dev->video_dev)) { + mutex_unlock(&dev->io_mutex); return -EIO; + } if (dev->status == STATUS_IDLE) { if (hdpvr_start_streaming(dev)) { |