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Nathan Chancellor 0bd3514664 staging: r8188eu: Reorganize error handling in rtw_drv_init() 
After commit 987219ad34 ("staging: r8188eu: remove lines from Makefile
that silence build warnings"), clang warns:

drivers/staging/r8188eu/os_dep/usb_intf.c:726:6: warning: variable
'status' is used uninitialized whenever 'if' condition is true
[-Wsometimes-uninitialized]
        if (!if1) {
            ^~~~
drivers/staging/r8188eu/os_dep/usb_intf.c:741:6: note: uninitialized use
occurs here
        if (status != _SUCCESS)
            ^~~~~~
drivers/staging/r8188eu/os_dep/usb_intf.c:726:2: note: remove the 'if'
if its condition is always false
        if (!if1) {
        ^~~~~~~~~~~
drivers/staging/r8188eu/os_dep/usb_intf.c:714:12: note: initialize the
variable 'status' to silence this warning
        int status;
                  ^
                   = 0
1 warning generated.

status is not initialized if the call to usb_dvobj_init() or
rtw_usb_if1_init() fails.

Looking at the error function as a whole, the error handling is odd
compared to the rest of the kernel, which prefers to set error codes on
goto paths, rather than a global "status" variable which determines the
error code at the end of the function and function calls in the case of
error.

Rearrange the error handling of this function to bring it more inline
with how the kernel does it in most cases, which helps readability.

The call to rtw_usb_if1_deinit() is eliminated because it is not
possible to ever hit it; if rtw_usb_if1_init() fails, the goto call
jumps over the call to rtw_usb_if1_deinit() and in the success case,
status is set to _SUCCESS.

Acked-by: Phillip Potter <phil@philpotter.co.uk>
Acked-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20210812204027.338872-4-nathan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-08-13 08:37:19 +02:00
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README 

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.