linux-kernel - Re: [PATCH 1/4] [Patch-next] ACPI, APEI, ERST Fix the wrong checking of Serialization Header's length

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Date:	Tue, 17 Aug 2010 11:22:24 +0800
From:	Huang Ying <ying.huang@...el.com>
To:	Jin Dongming <jin.dongming@...css.fujitsu.com>
Cc:	Randy Dunlap <randy.dunlap@...cle.com>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Andi Kleen <andi@...stfloor.org>,
	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>,
	ACPI <linux-acpi@...r.kernel.org>,
	LKLM <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/4] [Patch-next] ACPI, APEI, ERST Fix the wrong
 checking of Serialization Header's length

On Tue, 2010-08-17 at 10:14 +0800, Jin Dongming wrote:
> > I don't think it is necessary to change the header definition, and
> > seri_header is not a good name for me.
> Why I added this structure here is that I don't want to do following checking.
> For example,
> 	if (header_length != 0x0c) {
> 		...
> 	}

This can be:

 static int erst_check_table(struct acpi_table_erst *erst_tab)
 {
-       if (erst_tab->header_length != sizeof(struct acpi_table_erst))
+       if (erst_tab->header_length !=
+           (sizeof(struct acpi_table_erst) - sizeof(erst_tab->header)))

like Yinghai has been done.

Best Regards,
Huang Ying


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