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efde2659b0
linux/drivers/soc
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Stephen Boyd efde2659b0 drivers: qcom: rpmh-rsc: Use rcuidle tracepoints for rpmh 
This tracepoint is hit now that we call into the rpmh code from the cpu
idle path. Let's move this to be an rcuidle tracepoint so that we avoid
the RCU idle splat below

 =============================
 WARNING: suspicious RCU usage
 5.4.10 #68 Tainted: G S
 -----------------------------
 drivers/soc/qcom/trace-rpmh.h:72 suspicious rcu_dereference_check() usage!

 other info that might help us debug this:

 RCU used illegally from idle CPU!
 rcu_scheduler_active = 2, debug_locks = 1
 RCU used illegally from extended quiescent state!
 5 locks held by swapper/2/0:
  #0: ffffff81745d6ee8 (&(&genpd->slock)->rlock){+.+.}, at: genpd_lock_spin+0x1c/0x2c
  #1: ffffff81745da6e8 (&(&genpd->slock)->rlock/1){....}, at: genpd_lock_nested_spin+0x24/0x34
  #2: ffffff8174f2ca20 (&(&genpd->slock)->rlock/2){....}, at: genpd_lock_nested_spin+0x24/0x34
  #3: ffffff8174f2c300 (&(&drv->client.cache_lock)->rlock){....}, at: rpmh_flush+0x48/0x24c
  #4: ffffff8174f2c150 (&(&tcs->lock)->rlock){+.+.}, at: rpmh_rsc_write_ctrl_data+0x74/0x270

 stack backtrace:
 CPU: 2 PID: 0 Comm: swapper/2 Tainted: G S                5.4.10 #68
 Call trace:
  dump_backtrace+0x0/0x174
  show_stack+0x20/0x2c
  dump_stack+0xc8/0x124
  lockdep_rcu_suspicious+0xe4/0x104
  __tcs_buffer_write+0x230/0x2d0
  rpmh_rsc_write_ctrl_data+0x210/0x270
  rpmh_flush+0x84/0x24c
  rpmh_domain_power_off+0x78/0x98
  _genpd_power_off+0x40/0xc0
  genpd_power_off+0x168/0x208
  genpd_power_off+0x1e0/0x208
  genpd_power_off+0x1e0/0x208
  genpd_runtime_suspend+0x1ac/0x220
  __rpm_callback+0x70/0xfc
  rpm_callback+0x34/0x8c
  rpm_suspend+0x218/0x4a4
  __pm_runtime_suspend+0x88/0xac
  psci_enter_domain_idle_state+0x3c/0xb4
  cpuidle_enter_state+0xb8/0x284
  cpuidle_enter+0x38/0x4c
  call_cpuidle+0x3c/0x68
  do_idle+0x194/0x260
  cpu_startup_entry+0x24/0x28
  secondary_start_kernel+0x150/0x15c

Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Fixes: a65a397f24 ("cpuidle: psci: Add support for PM domains by using genpd")
Reported-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Cc: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20200115013751.249588-1-swboyd@chromium.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2020-03-09 11:52:21 -07:00
..
actions treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
amlogic soc: amlogic: meson-ee-pwrc: propagate errors from pm_genpd_init() 2019-12-09 15:21:20 -08:00
aspeed soc: aspeed: Fix snoop_file_poll()'s return type 2019-12-05 10:10:08 -08:00
atmel drivers: soc: atmel: move sam9x60 under its own config flag 2019-12-10 00:44:53 +01:00
bcm soc: bcm: brcmstb: biuctrl: Update programming for 7211 2020-01-05 13:44:04 -08:00
dove treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
fsl soc: fsl: qe: remove set but not used variable 'mm_gc' 2020-01-08 16:02:48 -06:00
gemini soc: Add SoC driver for Gemini 2018-01-04 17:01:53 +01:00
imx soc: imx: Enable compile testing of IMX_SCU_SOC 2020-01-09 17:20:10 +08:00
ixp4xx soc: ixp4xx: Protect IXP4xx SoC drivers by ARCH_IXP4XX || COMPILE_TEST 2019-08-29 17:34:38 +02:00
lantiq soc: lantiq: convert to devm_platform_ioremap_resource 2020-01-10 11:44:52 -08:00
mediatek Merge branch 'v5.5-next/cmdq-stable' into v5.5-next/soc 2020-01-10 11:00:45 +01:00
qcom drivers: qcom: rpmh-rsc: Use rcuidle tracepoints for rpmh 2020-03-09 11:52:21 -07:00
renesas soc: renesas: Add ARCH_R8A7795[01] for existing R-Car H3 2020-01-06 11:08:43 +01:00
rockchip ARM: SoC-related driver updates 2019-07-19 17:13:56 -07:00
samsung soc: samsung: Rename Samsung and Exynos to lowercase 2020-01-07 20:46:31 +01:00
sifive riscv: move sifive_l2_cache.h to include/soc 2020-01-12 10:12:44 -08:00
sunxi treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
tegra ARM: SoC-related driver updates 2020-02-08 14:04:19 -08:00
ti ARM: SoC-related driver updates 2020-02-08 14:04:19 -08:00
ux500 ARM: ux500: add missing of_node_put() 2019-07-23 09:49:32 +02:00
versatile treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
xilinx ARM: SoC-related driver updates 2020-02-08 14:04:19 -08:00
zte treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 2019-05-30 11:29:22 -07:00
Kconfig riscv: move sifive_l2_cache.c to drivers/soc 2019-12-20 03:40:24 -08:00
Makefile riscv: move sifive_l2_cache.c to drivers/soc 2019-12-20 03:40:24 -08:00