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[ Upstream commit26a9630c72] Currently the mask operation on variable conf is just 3 bits so the switch statement case value of 8 is unreachable dead code. The function daio_mgr_dao_init can be passed a 4 bit value, function dao_rsc_init calls it with conf set to: conf = (desc->msr & 0x7) | (desc->passthru << 3); so clearly when desc->passthru is set to 1 then conf can be at least 8. Fix this by changing the mask to 0xf. Fixes:8cc7236148("ALSA: SB X-Fi driver merge") Signed-off-by: Colin Ian King <colin.king@canonical.com> Link: https://lore.kernel.org/r/20210227001527.1077484-1-colin.king@canonical.com Signed-off-by: Takashi Iwai <tiwai@suse.de> 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.