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0f317ebb5f
When reading RepeaterAuth_Send_ReceiverID_List, RxInfo is read by itself once to retrieve the DEVICE_COUNT to calculate the size of the ReceiverID list then read a second time as a part of reading ReceiverID list. On some MST docking stations, RxInfo can only be read after the RxStatus READY bit is set otherwise the read will return -EIO. The spec states that the READY bit should be cleared as soon as RxInfo has been read. In this case, the first RxInfo read succeeds but after the READY bit is cleared, the second read fails. Fix it by reading RxInfo once and storing it before reading the rest of RepeaterAuth_Send_ReceiverID_List once we know the size. Modify get_receiver_id_list_size() to read and store RxInfo in the message buffer and also parse DEVICE_COUNT so we know the size of RepeaterAuth_Send_ReceiverID_List. Afterwards, retrieve the rest of the message at the offset for seq_num_V. Changes in v5: - Don't change the offset define for Send_ReceiverID_List When reading, update message offset to account for RxInfo being read Changes in v4: - rebase and edit commit message Changes in v3: - remove comment Changes in v2: - remove unnecessary moving of drm_i915_private from patch 1 Signed-off-by: Juston Li <juston.li@intel.com> Reviewed-by: Ramalingam C <ramalingam.c@intel.com> Reviewed-by: Anshuman Gupta <anshuman.gupta@intel.com> Tested-by: Suraj K <suraj.kandpal@intel.com> Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210819184835.1181323-3-juston.li@intel.com |
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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.