Re: [PATCH 0/2] mpt2sas,mpt3sas - PCI master abort fixups

[Joe Lawrence <joe.lawrence@stratus.com>]

On 12/30/2014 09:07 AM, Joe Lawrence wrote:
> A colleague noticed that the mpt2 and mpt3sas drivers do not correctly
> check the PCI master abort pattern in _base_wait_for_doorbell_ack.  This
> pattern should be checked *prior* to any valid bit patterns, which would
> always return true since a PCI read on master abort sets all bits high.
> 
> The second patch adds similar checking to _base_wait_for_doorbell_int and
> _base_wait_for_doorbell_not_used to avoid potentially long loops around
> PCI reads.
> 
> Joe Lawrence (2):
>   mpt2sas,mpt3sas: correct master-abort checking in doorbell ack
>   mpt2sas,mpt3sas: additional master abort checks
> 
>  drivers/scsi/mpt2sas/mpt2sas_base.c |   17 ++++++++++++-----
>  drivers/scsi/mpt3sas/mpt3sas_base.c |   17 ++++++++++++-----
>  2 files changed, 24 insertions(+), 10 deletions(-)
> 

Avago ping?

This one was pretty straightforward: check 0xFFFFFFFF *before* any
individual bit(s), i.e. before reading the doorbell register.

-- Joe