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authorHans de Goede <hdegoede@redhat.com>2011-06-26 00:39:19 +0400
committerMauro Carvalho Chehab <mchehab@redhat.com>2011-07-28 00:53:43 +0400
commitb824bb4b12548fedd622686d443310d574eb084e (patch)
tree09b71717e080d9809a73e4a198d15a7a892f0fb6 /drivers/media/video/pwc
parent1a4ede65f30315a31cb9b239bec0d4bb32834691 (diff)
downloadlinux-b824bb4b12548fedd622686d443310d574eb084e.tar.xz
[media] pwc: Get rid of error_status and unplugged variables
Having 2 ways of tracking disconnection is too much, remove both and instead simply set pdev->udev to NULL on disconnect. Also check for pdev->udev being NULL in all possible entry paths. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/pwc')
-rw-r--r--drivers/media/video/pwc/pwc-if.c38
-rw-r--r--drivers/media/video/pwc/pwc-v4l.c24
-rw-r--r--drivers/media/video/pwc/pwc.h2
3 files changed, 41 insertions, 23 deletions
diff --git a/drivers/media/video/pwc/pwc-if.c b/drivers/media/video/pwc/pwc-if.c
index 907db23fdb5d..6bff33b357b9 100644
--- a/drivers/media/video/pwc/pwc-if.c
+++ b/drivers/media/video/pwc/pwc-if.c
@@ -570,14 +570,7 @@ static void pwc_isoc_cleanup(struct pwc_device *pdev)
pwc_iso_stop(pdev);
pwc_iso_free(pdev);
-
- /* Stop camera, but only if we are sure the camera is still there (unplug
- is signalled by EPIPE)
- */
- if (pdev->error_status != EPIPE) {
- PWC_DEBUG_OPEN("Setting alternate interface 0.\n");
- usb_set_interface(pdev->udev, 0, 0);
- }
+ usb_set_interface(pdev->udev, 0, 0);
pdev->iso_init = 0;
PWC_DEBUG_OPEN("<< pwc_isoc_cleanup()\n");
@@ -719,6 +712,9 @@ static int pwc_video_open(struct file *file)
PWC_DEBUG_OPEN(">> video_open called(vdev = 0x%p).\n", vdev);
pdev = video_get_drvdata(vdev);
+ if (!pdev->udev)
+ return -ENODEV;
+
if (pdev->vopen) {
PWC_DEBUG_OPEN("I'm busy, someone is using the device.\n");
return -EBUSY;
@@ -760,7 +756,6 @@ static int pwc_video_open(struct file *file)
/* Reset buffers & parameters */
pdev->visoc_errors = 0;
- pdev->error_status = 0;
pwc_construct(pdev); /* set min/max sizes correct */
/* Set some defaults */
@@ -837,7 +832,7 @@ static int pwc_video_close(struct file *file)
pwc_free_buffers(pdev);
/* Turn off LEDS and power down camera, but only when not unplugged */
- if (!pdev->unplugged) {
+ if (pdev->udev) {
/* Turn LEDs off */
if (pwc_set_leds(pdev, 0, 0) < 0)
PWC_DEBUG_MODULE("Failed to set LED on/off time.\n");
@@ -859,8 +854,8 @@ static ssize_t pwc_video_read(struct file *file, char __user *buf,
struct video_device *vdev = file->private_data;
struct pwc_device *pdev = video_get_drvdata(vdev);
- if (pdev->error_status)
- return -pdev->error_status;
+ if (!pdev->udev)
+ return -ENODEV;
return vb2_read(&pdev->vb_queue, buf, count, ppos,
file->f_flags & O_NONBLOCK);
@@ -871,7 +866,7 @@ static unsigned int pwc_video_poll(struct file *file, poll_table *wait)
struct video_device *vdev = file->private_data;
struct pwc_device *pdev = video_get_drvdata(vdev);
- if (pdev->error_status)
+ if (!pdev->udev)
return POLL_ERR;
return vb2_poll(&pdev->vb_queue, file, wait);
@@ -923,8 +918,8 @@ static int buffer_prepare(struct vb2_buffer *vb)
struct pwc_device *pdev = vb2_get_drv_priv(vb->vb2_queue);
/* Don't allow queing new buffers after device disconnection */
- if (pdev->error_status)
- return -pdev->error_status;
+ if (!pdev->udev)
+ return -ENODEV;
return 0;
}
@@ -964,6 +959,9 @@ static int start_streaming(struct vb2_queue *vq)
{
struct pwc_device *pdev = vb2_get_drv_priv(vq);
+ if (!pdev->udev)
+ return -ENODEV;
+
return pwc_isoc_init(pdev);
}
@@ -971,7 +969,8 @@ static int stop_streaming(struct vb2_queue *vq)
{
struct pwc_device *pdev = vb2_get_drv_priv(vq);
- pwc_isoc_cleanup(pdev);
+ if (pdev->udev)
+ pwc_isoc_cleanup(pdev);
pwc_cleanup_queued_bufs(pdev);
return 0;
@@ -1389,15 +1388,12 @@ static void usb_pwc_disconnect(struct usb_interface *intf)
struct pwc_device *pdev = usb_get_intfdata(intf);
mutex_lock(&pdev->modlock);
- usb_set_intfdata (intf, NULL);
-
- /* We got unplugged; this is signalled by an EPIPE error code */
- pdev->error_status = EPIPE;
- pdev->unplugged = 1;
+ usb_set_intfdata(intf, NULL);
/* No need to keep the urbs around after disconnection */
pwc_isoc_cleanup(pdev);
pwc_cleanup_queued_bufs(pdev);
+ pdev->udev = NULL;
mutex_unlock(&pdev->modlock);
diff --git a/drivers/media/video/pwc/pwc-v4l.c b/drivers/media/video/pwc/pwc-v4l.c
index cda38837adcd..8bd0a681990d 100644
--- a/drivers/media/video/pwc/pwc-v4l.c
+++ b/drivers/media/video/pwc/pwc-v4l.c
@@ -288,6 +288,9 @@ static int pwc_vidioc_set_fmt(struct pwc_device *pdev, struct v4l2_format *f)
{
int ret, fps, snapshot, compression, pixelformat;
+ if (!pdev->udev)
+ return -ENODEV;
+
ret = pwc_vidioc_try_fmt(pdev, f);
if (ret<0)
return ret;
@@ -346,6 +349,9 @@ static int pwc_querycap(struct file *file, void *fh, struct v4l2_capability *cap
struct video_device *vdev = video_devdata(file);
struct pwc_device *pdev = video_drvdata(file);
+ if (!pdev->udev)
+ return -ENODEV;
+
strcpy(cap->driver, PWC_NAME);
strlcpy(cap->card, vdev->name, sizeof(cap->card));
usb_make_path(pdev->udev, cap->bus_info, sizeof(cap->bus_info));
@@ -414,6 +420,9 @@ static int pwc_g_ctrl(struct file *file, void *fh, struct v4l2_control *c)
struct pwc_device *pdev = video_drvdata(file);
int ret;
+ if (!pdev->udev)
+ return -ENODEV;
+
switch (c->id) {
case V4L2_CID_BRIGHTNESS:
c->value = pwc_get_brightness(pdev);
@@ -517,6 +526,9 @@ static int pwc_s_ctrl(struct file *file, void *fh, struct v4l2_control *c)
struct pwc_device *pdev = video_drvdata(file);
int ret;
+ if (!pdev->udev)
+ return -ENODEV;
+
switch (c->id) {
case V4L2_CID_BRIGHTNESS:
c->value <<= 9;
@@ -692,6 +704,9 @@ static int pwc_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
{
struct pwc_device *pdev = video_drvdata(file);
+ if (!pdev->udev)
+ return -ENODEV;
+
return vb2_qbuf(&pdev->vb_queue, buf);
}
@@ -699,6 +714,9 @@ static int pwc_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
{
struct pwc_device *pdev = video_drvdata(file);
+ if (!pdev->udev)
+ return -ENODEV;
+
return vb2_dqbuf(&pdev->vb_queue, buf, file->f_flags & O_NONBLOCK);
}
@@ -706,6 +724,9 @@ static int pwc_streamon(struct file *file, void *fh, enum v4l2_buf_type i)
{
struct pwc_device *pdev = video_drvdata(file);
+ if (!pdev->udev)
+ return -ENODEV;
+
return vb2_streamon(&pdev->vb_queue, i);
}
@@ -713,6 +734,9 @@ static int pwc_streamoff(struct file *file, void *fh, enum v4l2_buf_type i)
{
struct pwc_device *pdev = video_drvdata(file);
+ if (!pdev->udev)
+ return -ENODEV;
+
return vb2_streamoff(&pdev->vb_queue, i);
}
diff --git a/drivers/media/video/pwc/pwc.h b/drivers/media/video/pwc/pwc.h
index cfe82319f343..13b85246a261 100644
--- a/drivers/media/video/pwc/pwc.h
+++ b/drivers/media/video/pwc/pwc.h
@@ -161,7 +161,6 @@ struct pwc_device
int release; /* release number */
int features; /* feature bits */
char serial[30]; /* serial number (string) */
- int error_status; /* set when something goes wrong */
int usb_init; /* set when the cam has been initialized */
/*** Video data ***/
@@ -180,7 +179,6 @@ struct pwc_device
char vsnapshot; /* snapshot mode */
char vsync; /* used by isoc handler */
char vmirror; /* for ToUCaM series */
- char unplugged;
int cmd_len;
unsigned char cmd_buf[13];