Messages in this thread | | | Date | Fri, 24 Apr 2009 14:18:40 +0200 | From | Joerg Roedel <> | Subject | Re: dma_debug_device_change() gives bogus errors |
| |
On Fri, Apr 24, 2009 at 12:20:04PM +0100, David Vrabel wrote: > dma_debug_device_change() gives bogus errors if a driver unmaps dma > buffers within its driver->remove() method. This is because the > BUS_NOTIFY_UNBIND_DRIVER notification is raised before calling > driver->remove() (see __device_release_driver() in drivers/base/dd.c). > > By the time my driver->remove() completes, there are no DMA mappings > (debug_dma_dump_mappings() produces no output). > > Also, somewhat surprisingly, it only prints the error the first time the > driver is unbound.
Thanks for the report. This is being worked on already. I will disable this check for 2.6.30 and try to get a solution upstream for 2.6.31.
Joerg
-- | Advanced Micro Devices GmbH Operating | Karl-Hammerschmidt-Str. 34, 85609 Dornach bei München System | Research | Geschäftsführer: Jochen Polster, Thomas M. McCoy, Giuliano Meroni Center | Sitz: Dornach, Gemeinde Aschheim, Landkreis München | Registergericht München, HRB Nr. 43632
-- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |