On 04/27/2018 05:15 PM, Moritz Fischer wrote: > Hi Vinod, > > On Fri, Apr 27, 2018 at 12:08 AM, Vinod Koul <vinod.koul@xxxxxxxxx> wrote: >> On Fri, Apr 27, 2018 at 08:53:39AM +0200, Lars-Peter Clausen wrote: >>> On 04/27/2018 07:11 AM, Vinod Koul wrote: >>>> On Thu, Apr 26, 2018 at 10:40:00AM -0700, Moritz Fischer wrote: >>>>> Request IRQ with IRQF_SHARED flag. This works since the interrupt >>>>> handler already checks if there is an actual IRQ pending and returns >>>>> IRQ_NONE otherwise. >>>> >>>> hmmm what are we trying to fix here? Is your device on a shared line or not? >>> >>> IRQF_SHARED does not mean that the IRQ is on a shared line. It means that >>> the driver can handle it if the IRQ is on a shared line. Since the driver >>> can handle it setting the flag is a good idea since this enables usecases >>> where the line is shared. >> >> Yes that is correct indeed, but what is the motivation for the change. >> >> If you never expect this to be in shared environment why to do this? >> Sorry but "it works" is not a good enough reason for this change, to enable >> usecases where the line is shared is a good reason :) > > Remember, this is an FPGA soft core. I happen to have a design [1] where it > is hooked up with multiple of them on one IRQ line, so to make this work, > I need this change. I think what Vinod is asking for is a change to the commit message saying that "this change enables the driver to be used with devices where the interrupt line is shared". -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
