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The es581_tx_can_msg() does below cast: | tx_can_msg = (struct es581_4_tx_can_msg *) | &es581_4_urb_cmd->bulk_tx_can_msg.tx_can_msg_buf[msg_len - 1]; The -1 offset is to skip the first member of struct es581_4_tx_can_msg. However, es581_4_urb_cmd already has a raw_msg field which can be used instead without the use of an offset calculation. The function es58x_fd_tx_can_msg() is also modified to mirror es581_tx_can_msg(). Link: https://lore.kernel.org/r/20210628155420.1176217-7-mailhol.vincent@wanadoo.fr Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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.