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Cristian Marussi bccb966e93 firmware: arm_scmi: Fix SCMI genpd domain probing [ Upstream commit `e0f1a30cf1` ] When, at probe time, an SCMI communication failure inhibits the capacity to query power domains states, such domains should be skipped. Registering partially initialized SCMI power domains with genpd will causes kernel panic. arm-scmi timed out in resp(caller: scmi_power_state_get+0xa4/0xd0) scmi-power-domain scmi_dev.2: failed to get state for domain 9 Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 Mem abort info: ESR = 0x96000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 Data abort info: ISV = 0, ISS = 0x00000006 CM = 0, WnR = 0 user pgtable: 4k pages, 48-bit VAs, pgdp=00000009f3691000 [0000000000000000] pgd=00000009f1ca0003, p4d=00000009f1ca0003, pud=00000009f35ea003, pmd=0000000000000000 Internal error: Oops: 96000006 [#1] PREEMPT SMP CPU: 2 PID: 381 Comm: bash Not tainted 5.8.0-rc1-00011-gebd118c2cca8 #2 Hardware name: ARM LTD ARM Juno Development Platform/ARM Juno Development Platform, BIOS EDK II Jan 3 2020 Internal error: Oops: 96000006 [#1] PREEMPT SMP pstate: 80000005 (Nzcv daif -PAN -UAO BTYPE=--) pc : of_genpd_add_provider_onecell+0x98/0x1f8 lr : of_genpd_add_provider_onecell+0x48/0x1f8 Call trace: of_genpd_add_provider_onecell+0x98/0x1f8 scmi_pm_domain_probe+0x174/0x1e8 scmi_dev_probe+0x90/0xe0 really_probe+0xe4/0x448 driver_probe_device+0xfc/0x168 device_driver_attach+0x7c/0x88 bind_store+0xe8/0x128 drv_attr_store+0x2c/0x40 sysfs_kf_write+0x4c/0x60 kernfs_fop_write+0x114/0x230 __vfs_write+0x24/0x50 vfs_write+0xbc/0x1e0 ksys_write+0x70/0xf8 __arm64_sys_write+0x24/0x30 el0_svc_common.constprop.3+0x94/0x160 do_el0_svc+0x2c/0x98 el0_sync_handler+0x148/0x1a8 el0_sync+0x158/0x180 Do not register any power domain that failed to be queried with genpd. Fixes: `898216c97e` ("firmware: arm_scmi: add device power domain support using genpd") Link: https://lore.kernel.org/r/20200619220330.12217-1-cristian.marussi@arm.com Signed-off-by: Cristian Marussi <cristian.marussi@arm.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-08-19 08:14:48 +02:00
arch	arm64: dts: qcom: msm8916: Replace invalid bias-pull-none property	2020-08-19 08:14:48 +02:00
block	block: release bip in a right way in error path	2020-07-16 08:17:23 +02:00
certs	export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR()	2018-08-22 23:21:44 +09:00
crypto	crypto: af_alg - fix use-after-free in af_alg_accept() due to bh_lock_sock()	2020-07-09 09:37:10 +02:00
Documentation	doc: dt: bindings: usb: dwc3: Update entries for disabling SS instances in park mode	2020-07-22 09:32:04 +02:00
drivers	firmware: arm_scmi: Fix SCMI genpd domain probing	2020-08-19 08:14:48 +02:00
firmware	Fix built-in early-load Intel microcode alignment	2020-01-23 08:21:29 +01:00
fs	xattr: break delegations in {set,remove}xattr	2020-08-11 15:32:34 +02:00
include	tracepoint: Mark __tracepoint_string's __used	2020-08-19 08:14:47 +02:00
init	printk: queue wake_up_klogd irq_work only if per-CPU areas are ready	2020-07-22 09:32:13 +02:00
ipc	ipc/util.c: sysvipc_find_ipc() incorrectly updates position index	2020-05-20 08:18:40 +02:00
kernel	sched: correct SD_flags returned by tl->sd_flags()	2020-08-19 08:14:47 +02:00
lib	random32: remove net_rand_state from the latent entropy gcc plugin	2020-08-07 09:36:20 +02:00
LICENSES	LICENSES: Remove CC-BY-SA-4.0 license text	2018-10-18 11:28:50 +02:00
mm	mm: memcg/slab: fix memory leak at non-root kmem_cache destroy	2020-07-29 10:16:57 +02:00
net	rxrpc: Fix race between recvmsg and sendmsg on immediate call failure	2020-08-11 15:32:35 +02:00
samples	samples: bpf: Fix build error	2020-06-03 08:19:31 +02:00
scripts	scripts/gdb: fix lx-symbols 'gdb.error' while loading modules	2020-07-29 10:16:51 +02:00
security	Smack: fix use-after-free in smk_write_relabel_self()	2020-08-11 15:32:36 +02:00
sound	ALSA: seq: oss: Serialize ioctls	2020-08-11 15:32:31 +02:00
tools	selftests/net: relax cpu affinity requirement in msg_zerocopy test	2020-08-11 15:32:35 +02:00
usr	initramfs: restore default compression behavior	2020-04-13 10:44:59 +02:00
virt	KVM: arm64: Synchronize sysreg state on injecting an AArch32 exception	2020-06-22 09:05:09 +02:00
.clang-format	clang-format: Set IndentWrappedFunctionNames false	2018-08-01 18:38:51 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore	Kbuild updates for v4.17 (2nd)	2018-04-15 17:21:30 -07:00
.mailmap	libnvdimm-for-4.19_misc	2018-08-25 18:13:10 -07:00
COPYING	COPYING: use the new text with points to the license files	2018-03-23 12:41:45 -06:00
CREDITS	9p: remove Ron Minnich from MAINTAINERS	2018-08-17 16:20:26 -07:00
Kbuild	Kbuild updates for v4.15	2017-11-17 17:45:29 -08:00
Kconfig	kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt	2018-08-02 08:06:55 +09:00
MAINTAINERS	MAINTAINERS: Update drm/i915 bug filing URL	2020-02-28 16:38:49 +01:00
Makefile	Linux 4.19.139	2020-08-11 15:32:36 +02:00
README	Docs: Added a pointer to the formatted docs to README	2018-03-21 09:02:53 -06:00

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.