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in the case, qbuf once before start stream, than start stream and qbuf other buffers error info WARNING: CPU: 2 PID: 2811 at drivers/media/common/videobuf2/videobuf2-core.c:2035 __vb2_queue_cancel+0x1f8/0x260 Modules linked in: bcmdhd(O) r8168 CPU: 2 PID: 2811 Comm: PPThread Tainted: G W O 6.1.99 #520 Hardware name: Rockchip RK3576 EVB1 V10 Board + Rockchip RK628 HDMI to MIPI Extboard (DT) pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __vb2_queue_cancel+0x1f8/0x260 lr : __vb2_queue_cancel+0x38/0x260 sp : ffffffc00d3d3aa0 x29: ffffffc00d3d3aa0 x28: 00000000400004d8 x27: ffffff80eaa3c520 x26: ffffff80c7886e80 x25: 0000000000000009 x24: 00000000000e001b x23: ffffff80c6179880 x22: 0000000000000000 x21: ffffff80c4ae0a18 x20: ffffff80c4ae09f8 x19: ffffff80c4ae06a0 x18: ffffffc00a491070 x17: 696e696620676e69 x16: ffffffffffffffff x15: 0000000000000004 x14: ffffffc009fbbf80 x13: 0000000000003fff x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000000 x9 : 80d7bbf14371e500 x8 : 0000000000000001 x7 : 205b5d3937333231 x6 : 392e32393431205b x5 : ffffffc00a3d9617 x4 : ffffffc00d3d3707 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffffff80eaa3bd00 x0 : ffffff80eaa3bd00 Call trace: __vb2_queue_cancel+0x1f8/0x260 vb2_core_queue_release+0x20/0x50 vb2_fop_release+0x98/0xb0 rkcif_fh_release+0x30/0xb0 v4l2_release+0x94/0xf0 __fput+0x80/0x25c ____fput+0x10/0x1c task_work_run+0xb4/0xd8 do_exit+0x294/0x9bc do_group_exit+0x70/0x98 get_signal+0x72c/0x828 do_notify_resume+0x134/0x2140 el0_svc+0x4c/0x68 el0t_64_sync_handler+0x68/0xb4 el0t_64_sync+0x164/0x168 Signed-off-by: Zefa Chen <zefa.chen@rock-chips.com> Change-Id: I891866ffa8a3d14eddd2c03a693b39f392afb035
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.