Providing a range for usleep_range() allows the hrtimer subsystem to coalesce timers - as this delay has no upper limit anyway (interrupts or context switch is possible) it should not hurt to extend this from 2 to 2-4 milliseconds.
Signed-off-by: Nicholas Mc Guire hofrat@opentech.at ---
Problem located with an experimental coccinelle script
Basically usleep_range() with min == max never makes much sense notably in non-atomic context.
Patch was compile tested with: u8500_defconfig (implies CONFIG_SND_SOC_AB8500_CODEC=y) (with some sparse warnings about not implemented system calls)
Patch is against 5.1-rc3 (localversion-next is next=20190405)
sound/soc/codecs/ab8500-codec.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/sound/soc/codecs/ab8500-codec.c b/sound/soc/codecs/ab8500-codec.c index 87616b1..19e7f03 100644 --- a/sound/soc/codecs/ab8500-codec.c +++ b/sound/soc/codecs/ab8500-codec.c @@ -1062,10 +1062,10 @@ static void anc_iir(struct snd_soc_component *component, unsigned int bnk, snd_soc_component_update_bits(component, AB8500_ANCCONF1, BIT(AB8500_ANCCONF1_ANCIIRINIT), BIT(AB8500_ANCCONF1_ANCIIRINIT)); - usleep_range(AB8500_ANC_SM_DELAY, AB8500_ANC_SM_DELAY); + usleep_range(AB8500_ANC_SM_DELAY, AB8500_ANC_SM_DELAY*2); snd_soc_component_update_bits(component, AB8500_ANCCONF1, BIT(AB8500_ANCCONF1_ANCIIRINIT), 0); - usleep_range(AB8500_ANC_SM_DELAY, AB8500_ANC_SM_DELAY); + usleep_range(AB8500_ANC_SM_DELAY, AB8500_ANC_SM_DELAY*2); } else { snd_soc_component_update_bits(component, AB8500_ANCCONF1, BIT(AB8500_ANCCONF1_ANCIIRUPDATE),