[Xen-devel] [PATCH]Check the existence of serial port before usi

To:	"Keir Fraser" <keir.fraser@xxxxxxxxxxxxx>
Subject:	[Xen-devel] [PATCH]Check the existence of serial port before using
From:	"Chen, Huacai" <huacai.chen@xxxxxxxxx>
Date:	Fri, 12 Sep 2008 18:04:23 +0800
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Thread-topic:	[PATCH]Check the existence of serial port before using

Hi, Keir,
   Xen doesn't check the existence of serial ports before using in the
current version. This brings some problems, e.g., we will get a zero
value when reading a non-existent register, if this value is used as a
divider later the system will crash. We found some machines without
serial port will fail to do S3 because of this issue. The attached patch
fixed this problem.

Signed-off-by: Huacai Chen <huacai.chen@xxxxxxxxx>

serial_check.patch
Description: serial_check.patch

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[Xen-devel] [PATCH]Check the existence of serial port before using