[Xen-devel] [PATCH] x86/irq: fix locking for c/s 24707:96987c324a4f debugging code

["Jan Beulich" <JBeulich@xxxxxxxx>]

Without this, dump_irqs() may try to acquire the lock the caller is
currently holding.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

--- a/xen/arch/x86/irq.c
+++ b/xen/arch/x86/irq.c
@@ -668,6 +668,7 @@ void irq_move_cleanup_interrupt(struct c
             {
                 if ( unlikely(!test_bit(vector, desc->arch.used_vectors)) )
                 {
+                    spin_unlock(&desc->lock);
                     bitmap_scnlistprintf(keyhandler_scratch,
                                          sizeof(keyhandler_scratch),
                                          desc->arch.used_vectors->_bits,

Attachment: x86-24707-locking.patch
Description: Text document

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