On Tue, 2005-11-08 at 11:24 -0500, goggin, edward wrote:
> ! struct scsi_device *sdev = cmd->device;
> ! struct request_queue *q = sdev->request_queue;
> !
> ! // need to hold a reference on the device before we let go of the
> cmd
> ! if (scsi_device_get(sdev)) {
> ! scsi_put_command(cmd);
> ! return; // maybe sdev_state == SDEV_CANCEL, SDEV_DEL
> ! }
>
> scsi_put_command(cmd);
> scsi_run_queue(q);
> +
> + // ok to remove device now
> + scsi_device_put(sdev);
This is the right idea, I think, but not necessarily the right fix.
scsi_device_get() will fail if the device is going offline, but we would
still need to run the queues.
try this sequence instead:
get_device(&sdev->sdev_gendev);
scsi_put_command(cmd);
scsi_run_queue(q);
put_device(&sdev->sdev_gendev);
James
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