linux-stable.git/Documentation, branch v4.19.151

ata: make qc_prep return ata_completion_errors

2020-10-01T11:14:54+00:00

commit 95364f36701e62dd50eee91e1303187fd1a9f567 upstream.

In case a driver wants to return an error from qc_prep, return enum
ata_completion_errors. sata_mv is one of those drivers -- see the next
patch. Other drivers return the newly defined AC_ERR_OK.

[v2] use enum ata_completion_errors and AC_ERR_OK.

Signed-off-by: Jiri Slaby 
Cc: Jens Axboe 
Cc: linux-ide@vger.kernel.org
Signed-off-by: Jens Axboe 
Signed-off-by: Greg Kroah-Hartman

dt-bindings: sound: wm8994: Correct required supplies based on actual implementaion

2020-10-01T11:14:43+00:00

[ Upstream commit 8c149b7d75e53be47648742f40fc90d9fc6fa63a ]

The required supplies in bindings were actually not matching
implementation making the bindings incorrect and misleading.  The Linux
kernel driver requires all supplies to be present.  Also for wlf,wm8994
uses just DBVDD-supply instead of DBVDDn-supply (n: <1,3>).

Reported-by: Jonathan Bakker 
Signed-off-by: Krzysztof Kozlowski 
Link: https://lore.kernel.org/r/20200501133534.6706-1-krzk@kernel.org
Signed-off-by: Mark Brown 
Signed-off-by: Sasha Levin

kbuild: support LLVM=1 to switch the default tools to Clang/LLVM

2020-09-26T16:01:32+00:00

commit a0d1c951ef08ed24f35129267e3595d86f57f5d3 upstream.

As Documentation/kbuild/llvm.rst implies, building the kernel with a
full set of LLVM tools gets very verbose and unwieldy.

Provide a single switch LLVM=1 to use Clang and LLVM tools instead
of GCC and Binutils. You can pass it from the command line or as an
environment variable.

Please note LLVM=1 does not turn on the integrated assembler. You need
to pass LLVM_IAS=1 to use it. When the upstream kernel is ready for the
integrated assembler, I think we can make it default.

We discussed what we need, and we agreed to go with a simple boolean
flag that switches both target and host tools:

  https://lkml.org/lkml/2020/3/28/494
  https://lkml.org/lkml/2020/4/3/43

Some items discussed, but not adopted:

- LLVM_DIR

  When multiple versions of LLVM are installed, I just thought supporting
  LLVM_DIR=/path/to/my/llvm/bin/ might be useful.

  CC      = $(LLVM_DIR)clang
  LD      = $(LLVM_DIR)ld.lld
    ...

  However, we can handle this by modifying PATH. So, we decided to not do
  this.

- LLVM_SUFFIX

  Some distributions (e.g. Debian) package specific versions of LLVM with
  naming conventions that use the version as a suffix.

  CC      = clang$(LLVM_SUFFIX)
  LD      = ld.lld(LLVM_SUFFIX)
    ...

  will allow a user to pass LLVM_SUFFIX=-11 to use clang-11 etc.,
  but the suffixed versions in /usr/bin/ are symlinks to binaries in
  /usr/lib/llvm-#/bin/, so this can also be handled by PATH.

Signed-off-by: Masahiro Yamada 
Reviewed-by: Nathan Chancellor 
Tested-by: Nathan Chancellor  # build
Tested-by: Nick Desaulniers 
Reviewed-by: Nick Desaulniers 
Signed-off-by: Nick Desaulniers 
[nd: conflict in exported vars list from not backporting commit
 e83b9f55448a ("kbuild: add ability to generate BTF type info for vmlinux")]
[nd: hunk against Documentation/kbuild/kbuild.rst dropped due to not backporting
 commit cd238effefa2 ("docs: kbuild: convert docs to ReST and rename to *.rst")]
Signed-off-by: Greg Kroah-Hartman

kbuild: replace AS=clang with LLVM_IAS=1

2020-09-26T16:01:32+00:00

commit 7e20e47c70f810d678d02941fa3c671209c4ca97 upstream.

The 'AS' variable is unused for building the kernel. Only the remaining
usage is to turn on the integrated assembler. A boolean flag is a better
fit for this purpose.

AS=clang was added for experts. So, I replaced it with LLVM_IAS=1,
breaking the backward compatibility.

Suggested-by: Nick Desaulniers 
Signed-off-by: Masahiro Yamada 
Reviewed-by: Nathan Chancellor 
Reviewed-by: Nick Desaulniers 
Signed-off-by: Nick Desaulniers 
Signed-off-by: Greg Kroah-Hartman

Documentation/llvm: fix the name of llvm-size

2020-09-26T16:01:31+00:00

commit 0f44fbc162b737ff6251ae248184390ae2279fee upstream.

The tool is called llvm-size, not llvm-objsize.

Fixes: fcf1b6a35c16 ("Documentation/llvm: add documentation on building w/ Clang/LLVM")
Signed-off-by: Fangrui Song 
Reviewed-by: Nick Desaulniers 
Reviewed-by: Nathan Chancellor 
Signed-off-by: Masahiro Yamada 
Signed-off-by: Nick Desaulniers 
Signed-off-by: Greg Kroah-Hartman

Documentation/llvm: add documentation on building w/ Clang/LLVM

2020-09-26T16:01:31+00:00

commit fcf1b6a35c16ac500fa908a4022238e5d666eabf upstream.

added to kbuild documentation. Provides more official info on building
kernels with Clang and LLVM than our wiki.

Suggested-by: Kees Cook 
Reviewed-by: Kees Cook 
Reviewed-by: Nathan Chancellor 
Reviewed-by: Sedat Dilek 
Signed-off-by: Nick Desaulniers 
Signed-off-by: Masahiro Yamada 
[nd: hunk against Documentation/kbuild/index.rst dropped due to not backporting
 commit cd238effefa2 ("docs: kbuild: convert docs to ReST and rename to *.rst")]
Signed-off-by: Greg Kroah-Hartman

affs: fix basic permission bits to actually work

2020-09-09T17:04:30+00:00

commit d3a84a8d0dde4e26bc084b36ffcbdc5932ac85e2 upstream.

The basic permission bits (protection bits in AmigaOS) have been broken
in Linux' AFFS - it would only set bits, but never delete them.
Also, contrary to the documentation, the Archived bit was not handled.

Let's fix this for good, and set the bits such that Linux and classic
AmigaOS can coexist in the most peaceful manner.

Also, update the documentation to represent the current state of things.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable@vger.kernel.org
Signed-off-by: Max Staudt 
Signed-off-by: David Sterba 
Signed-off-by: Greg Kroah-Hartman

dt-bindings: iio: io-channel-mux: Fix compatible string in example code

2020-08-21T09:05:30+00:00

commit add48ba425192c6e04ce70549129cacd01e2a09e upstream.

The correct compatible string is "gpio-mux" (see
bindings/mux/gpio-mux.txt).

Cc: stable@vger.kernel.org # v4.13+
Reviewed-by: Peter Rosin 
Signed-off-by: Christian Eggers 
Link: https://lore.kernel.org/r/20200727101605.24384-1-ceggers@arri.de
Signed-off-by: Rob Herring 
Signed-off-by: Greg Kroah-Hartman

iio: improve IIO_CONCENTRATION channel type description

2020-08-19T06:14:54+00:00

[ Upstream commit df16c33a4028159d1ba8a7061c9fa950b58d1a61 ]

IIO_CONCENTRATION together with INFO_RAW specifier is used for reporting
raw concentrations of pollutants. Raw value should be meaningless
before being properly scaled. Because of that description shouldn't
mention raw value unit whatsoever.

Fix this by rephrasing existing description so it follows conventions
used throughout IIO ABI docs.

Fixes: 8ff6b3bc94930 ("iio: chemical: Add IIO_CONCENTRATION channel type")
Signed-off-by: Tomasz Duszynski 
Acked-by: Matt Ranostay 
Signed-off-by: Jonathan Cameron 
Signed-off-by: Sasha Levin

doc: dt: bindings: usb: dwc3: Update entries for disabling SS instances in park mode

2020-07-22T07:32:04+00:00

[ Upstream commit 3d157c28d2289edf0439e8308e8de3a06acaaf0e ]

This patch updates the documentation with the information related
to the quirks that needs to be added for disabling all SuperSpeed XHCI
instances in park mode.

Cc: Dongjin Kim 
Cc: Jianxin Pan 
Cc: Thinh Nguyen 
Cc: Jun Li 
Reported-by: Tim 
Signed-off-by: Neil Armstrong 
Acked-by: Rob Herring 
Signed-off-by: Felipe Balbi 
Signed-off-by: Sasha Levin