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[Xen-devel] [PATCH] x86/MSI: fix dump_msi() after c/s 24068:6928172f7ded
| To: | "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] [PATCH] x86/MSI: fix dump_msi() after c/s 24068:6928172f7ded |
| From: | "Jan Beulich" <JBeulich@xxxxxxxx> |
| Date: | Tue, 08 Nov 2011 16:54:34 +0000 |
| Delivery-date: | Tue, 08 Nov 2011 08:55:40 -0800 |
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The function must not blindly take the lock on IRQ descriptors.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
--- a/xen/arch/x86/msi.c
+++ b/xen/arch/x86/msi.c
@@ -1076,6 +1076,9 @@ static void dump_msi(unsigned char key)
unsigned long flags;
char type;
+ if ( !irq_desc_initialized(desc) )
+ continue;
+
spin_lock_irqsave(&desc->lock, flags);
entry = desc->msi_desc;
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