On Tue, Dec 26, 2017 at 10:37:13AM +0530, Rayagonda Kokatanur wrote: > Hi All, > > I am getting following error when I unload one of my dma client driver. > When I looked further into dmaengine.c file I found that the error is > because of WARN_ONCE in dma_async_device_unregister() api. > > Is this error expected ? > Why do we need that WARN_ONCE macro ? If I comment that, errors will vanish. > Do I need to set anything in client driver before calling > dma_async_device_unregister() api ? > > > root@bcm958802a8021:~# rmmod bcm_sba_raid > [ 357.891751] dma_async_device_unregister called while 2 clients hold a > reference that means you are trying to remove the module while two clients hold the ref. You should first ensure the clients are unloaded and then your driver IMO this is a valid warn. -- ~Vinod -- 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
