Cai YiWei eac9782a73 media: rockchip: isp: replace iommu detach/attach
fix NULL Pointer when isp to reset
[ 4486.719609]  __iommu_dma_unmap+0x14/0x7c
[ 4486.719968]  iommu_dma_unmap_sg+0x64/0x90
[ 4486.720348]  __iommu_unmap_sg_attrs+0x48/0x5c
[ 4486.720745]  vb2_dma_sg_dmabuf_ops_detach+0x60/0x80
[ 4486.721192]  dma_buf_detach+0x88/0x9c

iommu_detach_device will set domain to null,
and __iommu_dma_unmap using domain but no check.

Change-Id: I3c679565c6a7e67783e1750fc4d028191a9c9fcf
Signed-off-by: Cai YiWei <cyw@rock-chips.com>
2021-11-04 09:52:05 +08:00
2019-08-29 19:45:37 +08:00
2019-08-29 19:45:37 +08:00

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.
See Documentation/00-INDEX for a list of what is contained in each file.

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.
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