Re: [RFC] How to fix an async scan - rmmod race?
|[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]|
On 04/06/12 16:35, James Bottomley wrote: > On Fri, 2012-04-06 at 16:15 +0000, Bart Van Assche wrote: >> As far as I can see the queuecommand call in scsi_dispatch_cmd() can >> race with module removal - that call can be triggered while the host >> template is being unloaded. I'm not sure though what the best approach >> is to fix that race. > > Um, it's a bit hard to see how. It's not really possible to trigger > queuecommand except in the initial probe without an open device ... and > opening the device holds the module. Sorry, but I forgot to mention that it's not just scsi_dispatch_cmd() that invokes queuecommand via the host template. The SCSI error handler does that too. As far as I can see there is no protection in the SCSI error handler against LLD module removal. But maybe I overlooked something. Bart. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html