On Mon, Mar 13, 2023 at 3:47 PM Simon Gaiser <simon@xxxxxxxxxxxxxxxxxxxxxx> wrote: > > enable_irq_wake() can fail. Previously acpi_s2idle_prepare() silently > ignored it's return code. Based on [1] we should try to continue even in > case of an error, so just log a warning for now. > > Discovered when trying to go into s2idle under Xen. This leads to a > system that can't be woken, since xen-pirq currently doesn't support > setting wakeup IRQs [2]. With this you get at least some helpful log > message if you have access to console messages. > > Link: https://lore.kernel.org/linux-acpi/20230313125344.2893-1-simon@xxxxxxxxxxxxxxxxxxxxxx/ # v1 > Link: https://lore.kernel.org/linux-acpi/CAJZ5v0jahjt58nP6P5+xRdtD_ndYPvq4ecMVz6nfGu9tf5iaUw@xxxxxxxxxxxxxx/ # [1] > Link: https://lore.kernel.org/xen-devel/20230313134102.3157-1-simon@xxxxxxxxxxxxxxxxxxxxxx/ # [2] > Signed-off-by: Simon Gaiser <simon@xxxxxxxxxxxxxxxxxxxxxx> > --- > v2: > - Based on feedback switched to only logging a warning instead of > returning an error. > --- > drivers/acpi/sleep.c | 8 +++++++- > 1 file changed, 7 insertions(+), 1 deletion(-) > > diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c > index 4ca667251272..6b30dea94fae 100644 > --- a/drivers/acpi/sleep.c > +++ b/drivers/acpi/sleep.c > @@ -714,7 +714,13 @@ int acpi_s2idle_begin(void) > int acpi_s2idle_prepare(void) > { > if (acpi_sci_irq_valid()) { > - enable_irq_wake(acpi_sci_irq); > + int error; > + > + error = enable_irq_wake(acpi_sci_irq); > + if (error) > + pr_warn("Warning: Failed to enable wakeup from IRQ %d: %d\n", > + acpi_sci_irq, > + error); > acpi_ec_set_gpe_wake_mask(ACPI_GPE_ENABLE); > } > > -- Applied (with a minor white space adjustment) as 6.4 material, thanks!
