+ Oza On Tue, Jan 30, 2018 at 7:41 AM, Sinan Kaya <okaya@xxxxxxxxxxxxxx> wrote: > On 1/29/2018 4:31 PM, Keith Busch wrote: >> + if (!work_busy(&dpc->work)) >> + schedule_work(&dpc->work); > > Isn't there a race condition between the time that dpc_work() clears PCI_EXP_DPC_STATUS > register and when work actually completes by returning from dpc_work()? > > If the interrupt arrives just in this window, this code will not schedule the work. > > -- > Sinan Kaya > Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc. > Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.
