Messages in this thread |  | | | Date | Tue, 12 Jan 2010 13:54:10 -0800 | | From | Andrew Morton <> | | Subject | Re: [PATCH] mpt2sas: Fix &&/|| confusion in _scsih_sas_device_status_change_event() |
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On Thu, 7 Jan 2010 20:58:10 +0100 roel kluin <roel.kluin@gmail.com> wrote:
> On Thu, Jan 7, 2010 at 8:31 PM, Moore, Eric <Eric.Moore@lsi.com> wrote: > > nack > > > > The code beyond this check is intended for either INTERNAL_DEVICE_RESET or CMP_DEVICE_RESET. __ If the reason code is something else, we will want to return. __There are 10 other types of reason codes besides these two. This proposed patch means we return only when the reason code is either INTERNAL_DEVICE_RESET or CMP_INTERNAL_RESET. > > > > Eric Moore > > my patch is correct but my changelog was wrong. Sorry for the > confusion. It should have been: > > Even if the ReasonCode is not INTERNAL_DEVICE_RESET nor CMP_DEVICE_RESET > this still evaluates to true. >
yup, the current code is wrong.
if (!(event_data->ReasonCode == MPI2_EVENT_SAS_DEV_STAT_RC_INTERNAL_DEVICE_RESET && event_data->ReasonCode == MPI2_EVENT_SAS_DEV_STAT_RC_CMP_INTERNAL_DEV_RESET)) return; ReasonCode cannot equal two different things at the same time.
This is what we want:
if (event_data->ReasonCode != MPI2_EVENT_SAS_DEV_STAT_RC_INTERNAL_DEVICE_RESET && event_data->ReasonCode != MPI2_EVENT_SAS_DEV_STAT_RC_CMP_INTERNAL_DEV_RESET) return; Eric, the fix needs runtime testing please - it enables code which hasn't been executed in a long time, if ever.
In fact the compiler wasn't even emitting any code for the second half of _scsih_sas_device_status_change_event() because it worked out that there was no path to it.
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