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Filename Latest commit message Latest commit date
Mattias Jacobsson 090158555f USB: misc: appledisplay: fix backlight update_status return code
Upon success the update_status handler returns a positive number
corresponding to the number of bytes transferred by usb_control_msg.
However the return code of the update_status handler should indicate if
an error occurred(negative) or how many bytes of the user's input to sysfs
that was consumed. Return code zero indicates all bytes were consumed.

The bug can for example result in the update_status handler being called
twice, the second time with only the "unconsumed" part of the user's input
to sysfs. Effectively setting an incorrect brightness.

Change the update_status handler to return zero for all successful
transactions and forward usb_control_msg's error code upon failure.

Signed-off-by: Mattias Jacobsson <2pi@mok.nu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-10-18 19:44:39 +02:00
arch Merge 4.19-rc7 into usb-next 2018-10-08 15:40:42 +02:00
block blk-mq: I/O and timer unplugs are inverted in blktrace 2018-09-27 13:12:44 -06:00
certs
crypto
Documentation usb: host: add DT bindings for faraday fotg2 2018-10-15 15:57:29 +02:00
drivers USB: misc: appledisplay: fix backlight update_status return code 2018-10-18 19:44:39 +02:00
firmware
fs ocfs2: fix locking for res->tracking and dlm->tracking_list 2018-10-05 16:32:05 -07:00
include - Add pinctrl support for dual-role switch at chipidea-core 2018-10-08 16:27:14 +02:00
init
ipc ipc/shm.c: use ERR_CAST() for shm_lock() error return 2018-10-05 16:32:04 -07:00
kernel Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-10-06 02:11:30 -07:00
lib lib/xz: Put CRC32_POLY_LE in xz_private.h 2018-10-02 08:44:59 +10:00
LICENSES
mm Merge branch 'akpm' 2018-10-05 16:33:03 -07:00
net ipv6: take rcu lock in rawv6_send_hdrinc() 2018-10-05 14:45:34 -07:00
samples
scripts linux-kselftest-4.19-rc5 2018-09-17 07:24:28 +02:00
security Revert "uapi/linux/keyctl.h: don't use C++ reserved keyword as a struct member name" 2018-09-25 13:28:58 +02:00
sound ALSA: hda/realtek - Cannot adjust speaker's volume on Dell XPS 27 7760 2018-10-04 07:50:48 +02:00
tools Merge 4.19-rc7 into usb-next 2018-10-08 15:40:42 +02:00
usr
virt KVM: Remove obsolete kvm_unmap_hva notifier backend 2018-09-07 15:06:02 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS Merge 4.19-rc7 into usb-next 2018-10-08 15:40:42 +02:00
Makefile Linux 4.19-rc7 2018-10-07 17:26:02 +02:00
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.
See Documentation/00-INDEX for a list of what is contained in each file.

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.