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178cc55d51
Currently rtl_usb performs register writes using the async
usb_submit_urb() function. This appears to work fine for the RTL8192CU,
but the RTL8192DU (soon to be supported by rtlwifi) has a problem:
it transmits everything at the 1M rate in the 2.4 GHz band. (The 5 GHz
band is still untested.)
With this patch, rtl_usb performs the register writes using the
synchronous usb_control_msg() function, and the RTL8192DU works
normally. The RTL8192CU still works.
The vendor drivers use the async writes in only one function,
rtl8192du_trigger_gpio_0 / rtl8192cu_trigger_gpio_0, which probably
doesn't even run in real life. They use sync writes everywhere else.
Also, remove "sync" and "async" from the names of the members of
struct rtl_io to avoid confusion:
write{8,16,32}_async -> write{8,16,32}
read{8,16,32}_sync -> read{8,16,32}
Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
Acked-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://msgid.link/fb71bae6-8b19-4b6e-b4a6-0d260f2139e1@gmail.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.