> -----Original Message-----
> From: Neil Horman [mailto:[email protected]]
> Sent: Thursday, June 14, 2007 10:31 AM
> To: [email protected]
> Cc: Miller, Mike (OS Dev); ISS StorageDev;
> [email protected]; [email protected]
> Subject: [PATCH] cciss: force ignore of responses to unsent
> scsi commands after kexec reboot
>
> Hey -
> cciss hardware currently can continue to send responses
> to scsi commands after the host system has undergone a kexec
> reboot. The way the drier is currently written, reception of
> these commands results in a BUG halt, since it can't match
> the response to any issued command since the boot. This
> patch corrects that by using the kexec reset_devices command
> line paramter to force ignore any commands that it cant correlate.
>
> Regards
> Neil
>
> Signed-off-by: Neil Horman <[email protected]>
>
>
> cciss.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
>
> diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
> index 5acc6c4..ec1c1d2 100644
> --- a/drivers/block/cciss.c
> +++ b/drivers/block/cciss.c
> @@ -2131,6 +2131,14 @@ static int add_sendcmd_reject(__u8
> cmd, int ctlr, unsigned long complete)
> ctlr, complete);
> /* not much we can do. */
> #ifdef CONFIG_CISS_SCSI_TAPE
> + /* We might get notification of completion of commands
> + * which we never issued in this kernel if this boot is
> + * taking place after previous kernel's crash. Simply
> + * ignore the commands in this case.
> + */
> + if (reset_devices)
> + return 0;
> +
> return 1;
> }
>
I don't understand how this will help. We need to reset the controller
which reset_devices cannot do alone. I just haven't have the time to
implement the fix yet.
mikem
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