From 65c6edb300ee5c2aaac6d20c5fc8d11c3827593e Mon Sep 17 00:00:00 2001 From: Dean Anderson Date: Tue, 20 Apr 2010 17:21:32 -0300 Subject: [PATCH] V4L/DVB: s2255drv: fix: v4l2_dev should be registered once only. usb_set_intfdata should not be used when using v4l2_device_register and a non-NULL argument for the device. Signed-off-by: Dean Anderson Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/s2255drv.c | 39 +++++++++++++++++----------------- 1 file changed, 19 insertions(+), 20 deletions(-) diff --git a/drivers/media/video/s2255drv.c b/drivers/media/video/s2255drv.c index e1de2c4940b0..e6dc7fac5b01 100644 --- a/drivers/media/video/s2255drv.c +++ b/drivers/media/video/s2255drv.c @@ -229,7 +229,7 @@ struct s2255_fmt; /*forward declaration */ struct s2255_dev { struct video_device vdev[MAX_CHANNELS]; - struct v4l2_device v4l2_dev[MAX_CHANNELS]; + struct v4l2_device v4l2_dev; int channels; /* number of channels registered */ int frames; struct mutex lock; @@ -278,7 +278,14 @@ struct s2255_dev { u16 pid; /* product id */ struct kref kref; }; -#define to_s2255_dev(d) container_of(d, struct s2255_dev, kref) + +/* kref will be removed soon */ +#define to_s2255_dev_from_kref(d) container_of(d, struct s2255_dev, kref) + +static inline struct s2255_dev *to_s2255_dev(struct v4l2_device *v4l2_dev) +{ + return container_of(v4l2_dev, struct s2255_dev, v4l2_dev); +} struct s2255_fmt { char *name; @@ -1829,7 +1836,7 @@ static unsigned int s2255_poll(struct file *file, static void s2255_destroy(struct kref *kref) { - struct s2255_dev *dev = to_s2255_dev(kref); + struct s2255_dev *dev = to_s2255_dev_from_kref(kref); /* board shutdown stops the read pipe if it is running */ s2255_board_shutdown(dev); /* make sure firmware still not trying to load */ @@ -1947,11 +1954,9 @@ static int s2255_probe_v4l(struct s2255_dev *dev) int ret; int i; int cur_nr = video_nr; - for (i = 0; i < MAX_CHANNELS; i++) { - ret = v4l2_device_register(&dev->udev->dev, &dev->v4l2_dev[i]); - if (ret) - goto unreg_v4l2; - } + ret = v4l2_device_register(&dev->interface->dev, &dev->v4l2_dev); + if (ret) + return ret; /* initialize all video 4 linux */ /* register 4 video devices */ for (i = 0; i < MAX_CHANNELS; i++) { @@ -1976,7 +1981,7 @@ static int s2255_probe_v4l(struct s2255_dev *dev) break; } dev->channels++; - v4l2_info(&dev->v4l2_dev[i], "V4L2 device registered as %s\n", + v4l2_info(&dev->v4l2_dev, "V4L2 device registered as %s\n", video_device_node_name(&dev->vdev[i])); } @@ -1985,15 +1990,13 @@ static int s2255_probe_v4l(struct s2255_dev *dev) S2255_MAJOR_VERSION, S2255_MINOR_VERSION); /* if no channels registered, return error and probe will fail*/ - if (dev->channels == 0) + if (dev->channels == 0) { + v4l2_device_unregister(&dev->v4l2_dev); return ret; + } if (dev->channels != MAX_CHANNELS) printk(KERN_WARNING "s2255: Not all channels available.\n"); return 0; -unreg_v4l2: - for (i-- ; i > 0; i--) - v4l2_device_unregister(&dev->v4l2_dev[i]); - return ret; } /* this function moves the usb stream read pipe data @@ -2596,8 +2599,6 @@ static int s2255_probe(struct usb_interface *interface, dev_err(&interface->dev, "Could not find bulk-in endpoint\n"); goto errorEP; } - /* set intfdata */ - usb_set_intfdata(interface, dev); init_timer(&dev->timer); dev->timer.function = s2255_timer; dev->timer.data = (unsigned long)dev->fw_data; @@ -2682,13 +2683,12 @@ errorFWDATA1: return retval; } - /* disconnect routine. when board is removed physically or with rmmod */ static void s2255_disconnect(struct usb_interface *interface) { - struct s2255_dev *dev = NULL; + struct s2255_dev *dev = to_s2255_dev(usb_get_intfdata(interface)); int i; - dev = usb_get_intfdata(interface); + v4l2_device_unregister(&dev->v4l2_dev); /* unregister each video device. */ for (i = 0; i < MAX_CHANNELS; i++) if (video_is_registered(&dev->vdev[i])) @@ -2702,7 +2702,6 @@ static void s2255_disconnect(struct usb_interface *interface) dev->vidstatus_ready[i] = 1; wake_up(&dev->wait_vidstatus[i]); } - usb_set_intfdata(interface, NULL); kref_put(&dev->kref, s2255_destroy); dev_info(&interface->dev, "%s\n", __func__); } -- 2.20.1