On 0618T1303, John Baldwin wrote: > On Wednesday, June 18, 2014 12:13:15 pm Edward Tomasz Napierała wrote: > > On 0618T0947, John Baldwin wrote: > > > On Monday, June 16, 2014 3:21:55 pm Edward Tomasz Napierała wrote: > > > > Hi. Patch below should fix a problem where USB stops working after > > > > _second_ suspend/resume, which happens on various ThinkPad models. > > > > Please test, and report both success stories and failures. If nothing > > > > comes up, I'll commit it in a week or so. > > > > > > Good find. Have you thought about a more generic fix for this wherein > > > you > > > track power resources and flip them on during resume in ACPI before doing > > > DEVICE_RESUME() on the root bus? > > > > Thing is, after resume this device claims to be on already. The following > > simple hack was enough to make it work: > > Ahh, I think I see. Try this instead: > > Index: sys/dev/acpica/acpi_powerres.c > =================================================================== > --- acpi_powerres.c (revision 267550) > +++ acpi_powerres.c (working copy) > @@ -645,7 +645,7 @@ acpi_pwr_switch_power(void) > acpi_name(rp->ap_resource), status)); > /* XXX is this correct? Always switch if in doubt? */ > continue; > - } else if (rp->ap_state == ACPI_PWR_UNK) > + } else > rp->ap_state = cur; > > /* > @@ -689,7 +689,7 @@ acpi_pwr_switch_power(void) > acpi_name(rp->ap_resource), status)); > /* XXX is this correct? Always switch if in doubt? */ > continue; > - } else if (rp->ap_state == ACPI_PWR_UNK) > + } else > rp->ap_state = cur; > > /* > > (We were ignoring what _STA told us and believed it was ON because we had > cached that state previously.)
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