linux/drivers/bus
Loic Poulain cab2d3fd68 bus: mhi: core: Add support for forced PM resume
For whatever reason, some devices like QCA6390, WCN6855 using ath11k
are not in M3 state during PM resume, but still functional. The
mhi_pm_resume should then not fail in those cases, and let the higher
level device specific stack continue resuming process.

Add an API mhi_pm_resume_force(), to force resuming irrespective of the
current MHI state. This fixes a regression with non functional ath11k WiFi
after suspend/resume cycle on some machines.

Bug report: https://bugzilla.kernel.org/show_bug.cgi?id=214179

Link: https://lore.kernel.org/regressions/871r5p0x2u.fsf@codeaurora.org/
Fixes: 020d3b26c0 ("bus: mhi: Early MHI resume failure in non M3 state")
Cc: stable@vger.kernel.org #5.13
Reported-by: Kalle Valo <kvalo@codeaurora.org>
Reported-by: Pengyu Ma <mapengyu@gmail.com>
Tested-by: Kalle Valo <kvalo@kernel.org>
Acked-by: Kalle Valo <kvalo@kernel.org>
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
[mani: Switched to API, added bug report, reported-by tags and CCed stable]
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20211209131633.4168-1-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-09 18:47:05 +01:00
..
fsl-mc bus/fsl-mc: Add generic implementation for open/reset/close commands 2021-09-28 16:56:05 -06:00
mhi bus: mhi: core: Add support for forced PM resume 2021-12-09 18:47:05 +01:00
arm-cci.c
arm-integrator-lm.c
brcmstb_gisb.c - Config updates for BMIPS platform 2021-11-13 09:11:33 -08:00
bt1-apb.c
bt1-axi.c
da8xx-mstpri.c
hisi_lpc.c
imx-weim.c
intel-ixp4xx-eb.c bus: ixp4xx: return on error in ixp4xx_exp_probe() 2021-08-12 22:34:13 +02:00
Kconfig ARM: SoC drivers for 5.16 2021-11-03 17:00:52 -07:00
Makefile drivers: bus: Delete CONFIG_SIMPLE_PM_BUS 2021-10-05 17:47:22 +02:00
mips_cdmm.c
moxtet.c treewide: change my e-mail address, fix my name 2021-04-09 14:54:23 -07:00
mvebu-mbus.c ARM: mvebu: avoid clang -Wtautological-constant warning 2021-04-01 16:32:38 +02:00
omap_l3_noc.c bus: omap_l3_noc: mark l3 irqs as IRQF_NO_THREAD 2021-02-04 09:08:57 +02:00
omap_l3_noc.h
omap_l3_smx.c
omap_l3_smx.h
omap-ocp2scp.c
qcom-ebi2.c bus: qcom-ebi2: Fix incorrect documentation for '{slow,fast}_cfg' 2021-05-26 21:19:23 -05:00
simple-pm-bus.c drivers: bus: simple-pm-bus: Add support for probing simple bus only devices 2021-10-05 17:47:15 +02:00
sun50i-de2.c bus: sun50i-de2: Adjust printing error message 2021-10-13 14:48:48 +02:00
sunxi-rsb.c bus: Make remove callback return void 2021-07-21 11:53:42 +02:00
tegra-aconnect.c
tegra-gmi.c
ti-pwmss.c
ti-sysc.c ARM: SoC drivers for 5.16 2021-11-03 17:00:52 -07:00
ts-nbus.c
uniphier-system-bus.c
vexpress-config.c