Re: [EXT] Re: [PATCH v2 1/3] scsi: qla2xxx: avoid sending mailbox commands if firmware is stopped

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On Wed, 25 Mar 2020, 3:41pm, Martin Wilck wrote:

>
> ----------------------------------------------------------------------
> On Wed, 2020-03-25 at 15:13 -0700, Arun Easi wrote:
> > On Wed, 25 Mar 2020, 11:21am, Martin Wilck wrote:
> > 
> > > On Wed, 2020-03-25 at 18:20 +0100, Martin Wilck wrote:
> > > > Perhaps the (!fw_started) condition should be treated like
> > > > ABORT_ISP_ACTIVE in qla2x00_mailbox_command, i.e. execute only if
> > > > is_rom_cmd() returns true?
> > > 
> > > No, this won't be sufficient, as e.g. MBC_IOCB_COMMAND_A64 is in
> > > rom_cmds[], but has been found to hang (this is why I had the hunk
> > > in
> > > qla24xx_fabric_logout()). The list of mailbox commands
> > > that must be passed on when the FW is stopped has to be shorter
> > > than
> > > rom_cmds[].
> > > 
> > 
> > With your patch 2/3, where UNLOADING is set prior to the reset of 
> > chip, in place this issue should be largely addressed. Basically, 
> > paths that send out request to wire check UNLOADING bit (if any path 
> > is missing that, should add the check) before sending it out.
> > 
> > Now with UNLOADING set (with your patch 2/3), chip reset, and all 
> > outstanding command's completion called (qla2x00_abort_isp_cleanup) I 
> > see less chance of anything being sent out. If you see any issue with 
> > your patches 1 & 2 (addressing my comments) applied, let me know and 
> > we can tackle then. How about that?
> 
> It sounds like a plan. Although it means that I just wasted time trying
> to figure out which mailbox commands need to be processed even if the
> firmware is down :-)
> 

I hope it was not too much time. On the plus side, you know the mailbox 
path very well now. :)

Regards,
-Arun



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