From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alexey Starikovskiy <astarikovskiy@suse.de>
Subject: Re: patch for bugs 9998 and 10724
Date: Tue, 09 Sep 2008 13:12:43 +0400
Message-ID: <48C63E0B.2030801@suse.de>
References: <1219730254.4116.38.camel@yakui_zhao.sh.intel.com>	 <20080904121820.GC18288@one.firstfloor.org> <48BFD5AA.3090006@suse.de>	 <48BFD609.2050604@suse.de> <1220581596.3441.2.camel@rzhang-dt>	 <48C129D3.5000904@suse.de> <1220842582.3441.30.camel@rzhang-dt>	 <48C4E15F.2020701@suse.de> <1220951583.3989.85.camel@yakui_zhao.sh.intel.com>
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To: Zhao Yakui <yakui.zhao@intel.com>
Cc: Zhang Rui <rui.zhang@intel.com>, Andi Kleen <andi@firstfloor.org>, linux-acpi@vger.kernel.org, Len Brown <lenb@kernel.org>

Zhao Yakui wrote:
> Hi, Alexey
>     You attached the updated patch on the bug 10724/9998.
>     Can the following situation be handled by your patch?(For example:
> bug 10724)
>        EC GPE Interrupt storm is detected and EC GPE will be disabled
> when doing EC transaction.
>        If EC notification event happens while doing EC transaction(EC
> GPE is disabled), the SCI_EVT bit of EC status register is cleared
> automatically before we can handle it.
SCI_EVT is cleared only as a response to query command sent to EC, there is no 
timeout on it.
Transaction will take at most 2 ms (1 write/1 read or 2 writes in poll mode), 
and at the end of the transaction there is a check of the SCI bit.
With the un-patched EC SCI bit needs to stay for period while the QUERY_PENDING bit is set,
which could be quite more than 2 ms, and it seems to comply with that even on most broken
hardware.
>        Can the EC notification event be handled by OS?
What do you mean? 
> 
>  Thanks
>      Yakui.
Please strip unneeded tails from your mails.