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Tony Lindgren acea5424d9 ARM: OMAP2+: Manage MPU state properly for omap_enter_idle_coupled()
[ Upstream commit 294a3317bef52b189139c813b50dd14d344fa9ec ]

Based on more testing, commit 8ca5ee624b4c ("ARM: OMAP2+: Restore MPU
power domain if cpu_cluster_pm_enter() fails") is a poor fix for handling
cpu_cluster_pm_enter() returned errors.

We should not override the cpuidle states with a hardcoded PWRDM_POWER_ON
value. Instead, we should use a configured idle state that does not cause
the context to be lost. Otherwise we end up configuring a potentially
improper state for the MPUSS. We also want to update the returned state
index for the selected state.

Let's just select the highest power idle state C1 to ensure no context
loss is allowed on cpu_cluster_pm_enter() errors. With these changes we
can now unconditionally call omap4_enter_lowpower() for WFI like we did
earlier before commit 55be2f50336f ("ARM: OMAP2+: Handle errors for
cpu_pm"). And we can return the selected state index.

Fixes: 8f04aea048d5 ("ARM: OMAP2+: Restore MPU power domain if cpu_cluster_pm_enter() fails")
Fixes: 55be2f50336f ("ARM: OMAP2+: Handle errors for cpu_pm")
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-12-02 08:49:49 +01:00
arch ARM: OMAP2+: Manage MPU state properly for omap_enter_idle_coupled() 2020-12-02 08:49:49 +01:00
block blk-cgroup: Pre-allocate tree node on blkg_conf_prep 2020-11-10 12:37:30 +01:00
certs
crypto
Documentation xtensa: fix TLBTEMP area placement 2020-11-24 13:29:22 +01:00
drivers bus: ti-sysc: Fix bogus resetdone warning on enable for cpsw 2020-12-02 08:49:49 +01:00
fs proc: don't allow async path resolution of /proc/self components 2020-12-02 08:49:48 +01:00
include scsi: libiscsi: Fix NOP race condition 2020-12-02 08:49:49 +01:00
init
ipc
kernel sched/fair: Fix overutilized update in enqueue_task_fair() 2020-11-24 13:29:24 +01:00
lib random32: make prandom_u32() output unpredictable 2020-11-18 19:20:20 +01:00
LICENSES
mm mm, page_alloc: skip ->waternark_boost for atomic order-0 allocations 2020-11-24 13:29:24 +01:00
net ipv4: use IS_ENABLED instead of ifdef 2020-12-02 08:49:44 +01:00
samples
scripts
security selinux: Fix error return code in sel_ib_pkey_sid_slow() 2020-11-18 19:20:30 +01:00
sound ALSA: hda/realtek: Add some Clove SSID in the ALC293(ALC1220) 2020-11-24 13:29:20 +01:00
tools selftests/bpf: Fix error return code in run_getsockopt_test() 2020-11-24 13:29:07 +01:00
usr
virt KVM: arm64: vgic-v3: Drop the reporting of GICR_TYPER.Last for userspace 2020-12-02 08:49:46 +01:00
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Makefile Linux 5.4.80 2020-11-24 13:29:24 +01:00
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