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path: root/drivers/media/video/em28xx/em28xx-video.c
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Diffstat (limited to 'drivers/media/video/em28xx/em28xx-video.c')
-rw-r--r--drivers/media/video/em28xx/em28xx-video.c60
1 files changed, 48 insertions, 12 deletions
diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c
index 49ab0629702e..c53649e5315b 100644
--- a/drivers/media/video/em28xx/em28xx-video.c
+++ b/drivers/media/video/em28xx/em28xx-video.c
@@ -513,10 +513,17 @@ static struct videobuf_queue_ops em28xx_video_qops = {
*/
static int em28xx_config(struct em28xx *dev)
{
+ int retval;
/* Sets I2C speed to 100 KHz */
- if (!dev->is_em2800)
- em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
+ if (!dev->is_em2800) {
+ retval = em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
+ if (retval < 0) {
+ em28xx_errdev("%s: em28xx_write_regs_req failed! retval [%d]\n",
+ __func__, retval);
+ return retval;
+ }
+ }
/* enable vbi capturing */
@@ -1512,6 +1519,7 @@ static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
struct em28xx_fh *fh;
enum v4l2_buf_type fh_type = 0;
+ lock_kernel();
list_for_each_entry(h, &em28xx_devlist, devlist) {
if (h->vdev->minor == minor) {
dev = h;
@@ -1527,8 +1535,10 @@ static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
dev = h;
}
}
- if (NULL == dev)
+ if (NULL == dev) {
+ unlock_kernel();
return -ENODEV;
+ }
em28xx_videodbg("open minor=%d type=%s users=%d\n",
minor, v4l2_type_names[fh_type], dev->users);
@@ -1537,6 +1547,7 @@ static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
if (!fh) {
em28xx_errdev("em28xx-video.c: Out of memory?!\n");
+ unlock_kernel();
return -ENOMEM;
}
mutex_lock(&dev->lock);
@@ -1573,6 +1584,7 @@ static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
sizeof(struct em28xx_buffer), fh);
mutex_unlock(&dev->lock);
+ unlock_kernel();
return errCode;
}
@@ -1588,8 +1600,7 @@ static void em28xx_release_resources(struct em28xx *dev)
/*FIXME: I2C IR should be disconnected */
em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
- dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
- dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
+ dev->vdev->num, dev->vbi_dev->num);
list_del(&dev->devlist);
if (dev->sbutton_input_dev)
em28xx_deregister_snapshot_button(dev);
@@ -1948,13 +1959,23 @@ static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
}
/* register i2c bus */
- em28xx_i2c_register(dev);
+ errCode = em28xx_i2c_register(dev);
+ if (errCode < 0) {
+ em28xx_errdev("%s: em28xx_i2c_register - errCode [%d]!\n",
+ __func__, errCode);
+ return errCode;
+ }
/* Do board specific init and eeprom reading */
em28xx_card_setup(dev);
/* Configure audio */
- em28xx_audio_analog_set(dev);
+ errCode = em28xx_audio_analog_set(dev);
+ if (errCode < 0) {
+ em28xx_errdev("%s: em28xx_audio_analog_set - errCode [%d]!\n",
+ __func__, errCode);
+ return errCode;
+ }
/* configure the device */
em28xx_config_i2c(dev);
@@ -1974,6 +1995,11 @@ static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
dev->ctl_input = 2;
errCode = em28xx_config(dev);
+ if (errCode < 0) {
+ em28xx_errdev("%s: em28xx_config - errCode [%d]!\n",
+ __func__, errCode);
+ return errCode;
+ }
list_add_tail(&dev->devlist, &em28xx_devlist);
@@ -2026,17 +2052,27 @@ static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
if (dev->has_msp34xx) {
/* Send a reset to other chips via gpio */
- em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
+ errCode = em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
+ if (errCode < 0) {
+ em28xx_errdev("%s: em28xx_write_regs_req - msp34xx(1) failed! errCode [%d]\n",
+ __func__, errCode);
+ return errCode;
+ }
msleep(3);
- em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
+
+ errCode = em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
+ if (errCode < 0) {
+ em28xx_errdev("%s: em28xx_write_regs_req - msp34xx(2) failed! errCode [%d]\n",
+ __func__, errCode);
+ return errCode;
+ }
msleep(3);
}
video_mux(dev, 0);
em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
- dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
- dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
+ dev->vdev->num, dev->vbi_dev->num);
mutex_lock(&em28xx_extension_devlist_lock);
if (!list_empty(&em28xx_extension_devlist)) {
@@ -2236,7 +2272,7 @@ static void em28xx_usb_disconnect(struct usb_interface *interface)
em28xx_warn
("device /dev/video%d is open! Deregistration and memory "
"deallocation are deferred on close.\n",
- dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
+ dev->vdev->num);
dev->state |= DEV_MISCONFIGURED;
em28xx_uninit_isoc(dev);