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https://github.com/Fishwaldo/Star64_linux.git
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Driver Core patches for 5.10-rc1
Here is the "big" set of driver core patches for 5.10-rc1
They include a lot of different things, all related to the driver core
and/or some driver logic:
- sysfs common write functions to make it easier to audit sysfs
attributes
- device connection cleanups and fixes
- devm helpers for a few functions
- NOIO allocations for when devices are being removed
- minor cleanups and fixes
All have been in linux-next for a while with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core updates from Greg KH:
"Here is the "big" set of driver core patches for 5.10-rc1
They include a lot of different things, all related to the driver core
and/or some driver logic:
- sysfs common write functions to make it easier to audit sysfs
attributes
- device connection cleanups and fixes
- devm helpers for a few functions
- NOIO allocations for when devices are being removed
- minor cleanups and fixes
All have been in linux-next for a while with no reported issues"
* tag 'driver-core-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (31 commits)
regmap: debugfs: use semicolons rather than commas to separate statements
platform/x86: intel_pmc_core: do not create a static struct device
drivers core: node: Use a more typical macro definition style for ACCESS_ATTR
drivers core: Use sysfs_emit for shared_cpu_map_show and shared_cpu_list_show
mm: and drivers core: Convert hugetlb_report_node_meminfo to sysfs_emit
drivers core: Miscellaneous changes for sysfs_emit
drivers core: Reindent a couple uses around sysfs_emit
drivers core: Remove strcat uses around sysfs_emit and neaten
drivers core: Use sysfs_emit and sysfs_emit_at for show(device *...) functions
sysfs: Add sysfs_emit and sysfs_emit_at to format sysfs output
dyndbg: use keyword, arg varnames for query term pairs
driver core: force NOIO allocations during unplug
platform_device: switch to simpler IDA interface
driver core: platform: Document return type of more functions
Revert "driver core: Annotate dev_err_probe() with __must_check"
Revert "test_firmware: Test platform fw loading on non-EFI systems"
iio: adc: xilinx-xadc: use devm_krealloc()
hwmon: pmbus: use more devres helpers
devres: provide devm_krealloc()
syscore: Use pm_pr_dbg() for syscore_{suspend,resume}()
...
This commit is contained in:
Linus Torvalds
commit
fe151462bd
40 changed files with 1135 additions and 817 deletions
315
scripts/dev-needs.sh
Executable file
315
scripts/dev-needs.sh
Executable file
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@ -0,0 +1,315 @@
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#! /bin/sh
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (c) 2020, Google LLC. All rights reserved.
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# Author: Saravana Kannan <saravanak@google.com>
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function help() {
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cat << EOF
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Usage: $(basename $0) [-c|-d|-m|-f] [filter options] <list of devices>
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This script needs to be run on the target device once it has booted to a
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shell.
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The script takes as input a list of one or more device directories under
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/sys/devices and then lists the probe dependency chain (suppliers and
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parents) of these devices. It does a breadth first search of the dependency
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chain, so the last entry in the output is close to the root of the
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dependency chain.
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By default it lists the full path to the devices under /sys/devices.
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It also takes an optional modifier flag as the first parameter to change
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what information is listed in the output. If the requested information is
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not available, the device name is printed.
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-c lists the compatible string of the dependencies
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-d lists the driver name of the dependencies that have probed
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-m lists the module name of the dependencies that have a module
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-f list the firmware node path of the dependencies
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-g list the dependencies as edges and nodes for graphviz
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-t list the dependencies as edges for tsort
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The filter options provide a way to filter out some dependencies:
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--allow-no-driver By default dependencies that don't have a driver
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attached are ignored. This is to avoid following
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device links to "class" devices that are created
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when the consumer probes (as in, not a probe
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dependency). If you want to follow these links
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anyway, use this flag.
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--exclude-devlinks Don't follow device links when tracking probe
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dependencies.
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--exclude-parents Don't follow parent devices when tracking probe
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dependencies.
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EOF
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}
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function dev_to_detail() {
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local i=0
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while [ $i -lt ${#OUT_LIST[@]} ]
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do
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local C=${OUT_LIST[i]}
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local S=${OUT_LIST[i+1]}
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local D="'$(detail_chosen $C $S)'"
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if [ ! -z "$D" ]
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then
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# This weirdness is needed to work with toybox when
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# using the -t option.
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printf '%05u\t%s\n' ${i} "$D" | tr -d \'
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fi
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i=$((i+2))
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done
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}
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function already_seen() {
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local i=0
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while [ $i -lt ${#OUT_LIST[@]} ]
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do
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if [ "$1" = "${OUT_LIST[$i]}" ]
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then
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# if-statement treats 0 (no-error) as true
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return 0
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fi
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i=$(($i+2))
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done
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# if-statement treats 1 (error) as false
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return 1
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}
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# Return 0 (no-error/true) if parent was added
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function add_parent() {
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if [ ${ALLOW_PARENTS} -eq 0 ]
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then
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return 1
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fi
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local CON=$1
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# $CON could be a symlink path. So, we need to find the real path and
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# then go up one level to find the real parent.
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local PARENT=$(realpath $CON/..)
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while [ ! -e ${PARENT}/driver ]
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do
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if [ "$PARENT" = "/sys/devices" ]
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then
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return 1
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fi
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PARENT=$(realpath $PARENT/..)
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done
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CONSUMERS+=($PARENT)
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OUT_LIST+=(${CON} ${PARENT})
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return 0
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}
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# Return 0 (no-error/true) if one or more suppliers were added
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function add_suppliers() {
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local CON=$1
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local RET=1
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if [ ${ALLOW_DEVLINKS} -eq 0 ]
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then
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return 1
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fi
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SUPPLIER_LINKS=$(ls -1d $CON/supplier:* 2>/dev/null)
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for SL in $SUPPLIER_LINKS;
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do
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SYNC_STATE=$(cat $SL/sync_state_only)
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# sync_state_only links are proxy dependencies.
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# They can also have cycles. So, don't follow them.
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if [ "$SYNC_STATE" != '0' ]
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then
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continue
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fi
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SUPPLIER=$(realpath $SL/supplier)
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if [ ! -e $SUPPLIER/driver -a ${ALLOW_NO_DRIVER} -eq 0 ]
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then
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continue
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fi
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CONSUMERS+=($SUPPLIER)
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OUT_LIST+=(${CON} ${SUPPLIER})
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RET=0
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done
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return $RET
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}
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function detail_compat() {
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f=$1/of_node/compatible
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if [ -e $f ]
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then
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echo -n $(cat $f)
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else
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echo -n $1
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fi
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}
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function detail_module() {
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f=$1/driver/module
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if [ -e $f ]
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then
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echo -n $(basename $(realpath $f))
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else
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echo -n $1
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fi
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}
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function detail_driver() {
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f=$1/driver
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if [ -e $f ]
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then
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echo -n $(basename $(realpath $f))
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else
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echo -n $1
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fi
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}
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function detail_fwnode() {
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f=$1/firmware_node
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if [ ! -e $f ]
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then
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f=$1/of_node
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fi
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if [ -e $f ]
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then
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echo -n $(realpath $f)
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else
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echo -n $1
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fi
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}
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function detail_graphviz() {
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if [ "$2" != "ROOT" ]
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then
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echo -n "\"$(basename $2)\"->\"$(basename $1)\""
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else
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echo -n "\"$(basename $1)\""
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fi
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}
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function detail_tsort() {
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echo -n "\"$2\" \"$1\""
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}
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function detail_device() { echo -n $1; }
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alias detail=detail_device
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ALLOW_NO_DRIVER=0
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ALLOW_DEVLINKS=1
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ALLOW_PARENTS=1
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while [ $# -gt 0 ]
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do
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ARG=$1
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case $ARG in
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--help)
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help
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exit 0
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;;
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-c)
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alias detail=detail_compat
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;;
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-m)
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alias detail=detail_module
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;;
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-d)
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alias detail=detail_driver
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;;
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-f)
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alias detail=detail_fwnode
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;;
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-g)
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alias detail=detail_graphviz
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;;
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-t)
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alias detail=detail_tsort
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;;
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--allow-no-driver)
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ALLOW_NO_DRIVER=1
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;;
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--exclude-devlinks)
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ALLOW_DEVLINKS=0
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;;
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--exclude-parents)
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ALLOW_PARENTS=0
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;;
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*)
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# Stop at the first argument that's not an option.
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break
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;;
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esac
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shift
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done
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function detail_chosen() {
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detail $1 $2
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}
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if [ $# -eq 0 ]
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then
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help
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exit 1
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fi
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CONSUMERS=($@)
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OUT_LIST=()
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# Do a breadth first, non-recursive tracking of suppliers. The parent is also
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# considered a "supplier" as a device can't probe without its parent.
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i=0
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while [ $i -lt ${#CONSUMERS[@]} ]
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do
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CONSUMER=$(realpath ${CONSUMERS[$i]})
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i=$(($i+1))
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if already_seen ${CONSUMER}
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then
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continue
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fi
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# If this is not a device with a driver, we don't care about its
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# suppliers.
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if [ ! -e ${CONSUMER}/driver -a ${ALLOW_NO_DRIVER} -eq 0 ]
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then
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continue
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fi
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ROOT=1
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# Add suppliers to CONSUMERS list and output the consumer details.
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#
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# We don't need to worry about a cycle in the dependency chain causing
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# infinite loops. That's because the kernel doesn't allow cycles in
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# device links unless it's a sync_state_only device link. And we ignore
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# sync_state_only device links inside add_suppliers.
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if add_suppliers ${CONSUMER}
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then
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ROOT=0
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fi
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if add_parent ${CONSUMER}
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then
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ROOT=0
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fi
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if [ $ROOT -eq 1 ]
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then
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OUT_LIST+=(${CONSUMER} "ROOT")
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fi
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done
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# Can NOT combine sort and uniq using sort -suk2 because stable sort in toybox
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# isn't really stable.
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dev_to_detail | sort -k2 -k1 | uniq -f 1 | sort | cut -f2-
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exit 0
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