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Message-Id: <1281974138-5553-1-git-send-email-shijie8@gmail.com> Date: Mon, 16 Aug 2010 23:55:38 +0800 From: Huang Shijie <shijie8@...il.com> To: akpm@...ux-foundation.org Cc: linux-kernel@...r.kernel.org, Huang Shijie <shijie8@...il.com> Subject: [PATCH] avoiding the same resource to be inserted If the same resource is inserted to the resource tree (maybe not on purpose), a dead loop will be created. In this situation, The kernel does not report any warning or error :( The command below will show a endless print. #cat /proc/iomem So, adding the check for the same resource is needed for the stability and reliability of the kernel. Signed-off-by: Huang Shijie <shijie8@...il.com> --- kernel/resource.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/kernel/resource.c b/kernel/resource.c index 7b36976..60daab4 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -451,7 +451,7 @@ static struct resource * __insert_resource(struct resource *parent, struct resou if (!first) return first; - if (first == parent) + if (first == parent || first == new) return first; if ((first->start > new->start) || (first->end < new->end)) -- 1.6.6.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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