Re: [PATCH v2 2/3] acornscsi: remove tagged queuing vestiges

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On Wed, Sep 15, 2021 at 11:16 AM John Garry <john.garry@xxxxxxxxxx> wrote:
>
> From: Hannes Reinecke <hare@xxxxxxx>
>
> The acornscsi driver has a config option to enable tagged queuing,
> but this option gets disabled in the driver itself with the comment
> 'needs to be debugged'.
> As this is a _really_ old driver I doubt anyone will be wanting to
> invest time here, so remove the tagged queue vestiges and make
> our live easier.
>
> Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
> jpg: Use scsi_cmd_to_rq()
> Signed-off-by: John Garry <john.garry@xxxxxxxxxx>

A few thousand randconfig builds later, I actually came across
building this driver.

> @@ -1821,7 +1776,7 @@ int acornscsi_reconnect_finish(AS_Host *host)
>         host->scsi.disconnectable = 0;
>         if (host->SCpnt->device->id  == host->scsi.reconnected.target &&
>             host->SCpnt->device->lun == host->scsi.reconnected.lun &&
> -           host->SCpnt->tag         == host->scsi.reconnected.tag) {
> +           scsi_cmd_to_tag(host->SCpnt) == host->scsi.reconnected.tag) {
>  #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON))
>             DBG(host->SCpnt, printk("scsi%d.%c: reconnected",
>                     host->host->host_no, acornscsi_target(host)));

drivers/scsi/arm/acornscsi.c: In function 'acornscsi_reconnect_finish':
drivers/scsi/arm/acornscsi.c:1779:6: error: implicit declaration of
function 'scsi_cmd_to_tag'; did you mean 'scsi_cmd_to_rq'?
[-Werror=implicit-function-declaration]
      scsi_cmd_to_tag(host->SCpnt) == host->scsi.reconnected.tag) {
      ^~~~~~~~~~~~~~~
      scsi_cmd_to_rq

I have no idea what this is meant to do instead, but scsi_cmd_to_tag()
does not appear to be defined in any kernel I can find.

       Arnd



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