Hello,
On Wed, Nov 28, 2012 at 01:53:58PM +0100, Bart Van Assche wrote:
> The function scsi_remove_host() may get invoked concurrently with
> scsi_request_fn(). Kill those I/O requests for which processing
> starts after scsi_remove_host() has been invoked. This makes
> device removal a little quicker by avoiding that such SCSI
> commands time out.
...
> diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
> index f3d6e0d..5fe25b3 100644
> --- a/drivers/scsi/scsi_lib.c
> +++ b/drivers/scsi/scsi_lib.c
> @@ -1549,7 +1549,8 @@ static void scsi_request_fn(struct request_queue *q)
> if (!req || !scsi_dev_queue_ready(q, sdev))
> break;
>
> - if (unlikely(!scsi_device_online(sdev))) {
> + if (unlikely(!scsi_device_online(sdev) ||
> + !scsi_host_scan_allowed(shost))) {
> sdev_printk(KERN_ERR, sdev,
> "rejecting I/O to offline device\n");
> scsi_kill_request(req, q);
I don't know. This feels a bit weird to me. Shouldn't we instead
make sure that scsi_device_onilne() test fails once host removal is
initiated?
Thanks.
--
tejun
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