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[ Upstream commit84f2faa785] Serial core handles serial_rs485 sanitization. When em485 init fails, there are two possible paths of entry: 1) uart_rs485_config (init path) that fully clears port->rs485 on error. 2) ioctl path with a pre-existing, valid port->rs485 unto which the kernel falls back on error and port->rs485 should therefore be kept untouched. The temporary rs485 struct is not returned to userspace in case of error so its flag don't matter. ...Thus SER_RS485_ENABLED clearing on error can/should be dropped. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Link: https://lore.kernel.org/r/20220606100433.13793-37-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Stable-dep-of:93810191f5("serial: 8250: omap: Fix missing PM runtime calls for omap8250_set_mctrl()") Signed-off-by: Sasha Levin <sashal@kernel.org>
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.