diff options
| author | Takashi Iwai <tiwai@suse.de> | 2020-10-12 16:08:57 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2020-10-12 16:08:57 +0200 |
| commit | f401b2c9931a70317b6ac0d3e6020adc3a404cc0 (patch) | |
| tree | b73efe177884c84bd86f647e2081583d719dde93 /drivers/cpuidle/cpuidle-pseries.c | |
| parent | a6e7d0a4bdb02a7a3ffe0b44aaa8842b7efdd056 (diff) | |
| parent | c890e30b069a2792a5a34e8510a7a437dd6f5b3d (diff) | |
Merge tag 'asoc-v5.10' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Updates for v5.10
Not a huge amount going on in the core for ASoC this time but quite a
lot of driver activity, especially for the Intel platforms:
- Replacement of the DSP driver for some older x86 systems with a new
one which was written with closer reference to the DSP firmware so
should hopefully be more robust and maintainable.
- A big batch of static checker and other fixes for the rest of the x86
DSP drivers.
- Cleanup of the error unwinding code from Morimoto-san, hopefully
making it more robust.
- Helpers for parsing auxiluary devices from the device tree from
Stephan Gerhold.
- New support for AllWinner A64, Cirrus Logic CS4234, Mediatek MT6359
Microchip S/PDIF TX and RX controllers, Realtek RT1015P, and Texas
Instruments J721E, TAS2110, TAS2564 and TAS2764
Diffstat (limited to 'drivers/cpuidle/cpuidle-pseries.c')
| -rw-r--r-- | drivers/cpuidle/cpuidle-pseries.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/cpuidle/cpuidle-pseries.c b/drivers/cpuidle/cpuidle-pseries.c index ff6d99e923a4..a2b5c6f60cf0 100644 --- a/drivers/cpuidle/cpuidle-pseries.c +++ b/drivers/cpuidle/cpuidle-pseries.c @@ -361,7 +361,10 @@ static void __init fixup_cede0_latency(void) for (i = 0; i < nr_xcede_records; i++) { struct xcede_latency_record *record = &payload->records[i]; u64 latency_tb = be64_to_cpu(record->latency_ticks); - u64 latency_us = tb_to_ns(latency_tb) / NSEC_PER_USEC; + u64 latency_us = DIV_ROUND_UP_ULL(tb_to_ns(latency_tb), NSEC_PER_USEC); + + if (latency_us == 0) + pr_warn("cpuidle: xcede record %d has an unrealistic latency of 0us.\n", i); if (latency_us < min_latency_us) min_latency_us = latency_us; @@ -378,10 +381,14 @@ static void __init fixup_cede0_latency(void) * Perform the fix-up. */ if (min_latency_us < dedicated_states[1].exit_latency) { - u64 cede0_latency = min_latency_us - 1; + /* + * We set a minimum of 1us wakeup latency for cede0 to + * distinguish it from snooze + */ + u64 cede0_latency = 1; - if (cede0_latency <= 0) - cede0_latency = min_latency_us; + if (min_latency_us > cede0_latency) + cede0_latency = min_latency_us - 1; dedicated_states[1].exit_latency = cede0_latency; dedicated_states[1].target_residency = 10 * (cede0_latency); |