Fix Lenovo-E550 camera kernel issue (ubuntu)

ignore_chining_errors.patch

--- drivers/media/usb/uvc/uvc_driver.c.orig 2015-06-06 22:48:39.375283516 +0900
+++ drivers/media/usb/uvc/uvc_driver.c  2015-06-06 22:48:08.371766829 +0900
@@ -1496,7 +1496,8 @@
    if (entity == NULL) {
        uvc_trace(UVC_TRACE_DESCR, "Found reference to "
            "unknown entity %d.\n", id);
-       return -EINVAL;
+//     return -EINVAL;
+return 0;
    }

    *_entity = entity;
@@ -1518,7 +1519,8 @@
        if (entity->chain.next || entity->chain.prev) {
            uvc_trace(UVC_TRACE_DESCR, "Found reference to "
                "entity %d already in chain.\n", entity->id);
-           return -EINVAL;
+//         return -EINVAL;
+return 0;
        }

        /* Process entity */

Lenovo-E550.camera_fix.README

To fix the Lenovo E550 builtin camera recognition error

1. Get the current kernel source:

apt-get source linux-image-$(uname -r)

2. Apply the patch (in the root of the kernel source):

patch -p1 < ../ignore_chining_errors.patch

3. Edit debian.master/changelog, add +vadim to the version number at the top of the file

4. Build kernel:

fakeroot debian/rules clean
fakeroot debian/rules binary-headers binary-generic

5. Install resulting .deb packages:

sudo dpkg -i linux*2.6.38-7.37*.deb

6. Reboot