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authorScott Wood <scottwood@freescale.com>2006-10-23 20:35:22 +0400
committerPaul Mackerras <paulus@samba.org>2006-10-25 07:49:22 +0400
commitf49196a5f53aa62a964b08ffa2c59699a0c8eb53 (patch)
tree3400c448ec36f07681d6ab9541e175e2818c772c /arch/powerpc/sysdev/ipic.c
parentf84c39da766b4c8f13872282f58286a57ad05b3e (diff)
downloadlinux-f49196a5f53aa62a964b08ffa2c59699a0c8eb53.tar.xz
[POWERPC] IPIC: Fix spinlock recursion in set_irq_handler
This causes ipic_set_irq_type to set the handler directly rather than call set_irq_handler, which causes spinlock recursion because the lock is already held when ipic_set_irq_type is called. I'm also not convinced that ipic_set_irq_type should be changing the handler at all. There seem to be several controllers that don't and several that do. Those that do would break what appears to be a common usage of calling set_irq_chip_and_handler followed by set_irq_type, if a non-standard handler were to be used. OTOH, irq_create_of_mapping() doesn't set the handler, but only calls set_irq_type(). This patch gets things working in the spinlock-debugging-enabled case, but I'm curious as to where the handler setting is ideally supposed to be done. I don't see any documentation on set_irq_type() that clarifies what the semantics are supposed to be. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/sysdev/ipic.c')
-rw-r--r--arch/powerpc/sysdev/ipic.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/sysdev/ipic.c b/arch/powerpc/sysdev/ipic.c
index bc4d4a7f9657..746f78c15375 100644
--- a/arch/powerpc/sysdev/ipic.c
+++ b/arch/powerpc/sysdev/ipic.c
@@ -473,9 +473,9 @@ static int ipic_set_irq_type(unsigned int virq, unsigned int flow_type)
desc->status |= flow_type & IRQ_TYPE_SENSE_MASK;
if (flow_type & IRQ_TYPE_LEVEL_LOW) {
desc->status |= IRQ_LEVEL;
- set_irq_handler(virq, handle_level_irq);
+ desc->handle_irq = handle_level_irq;
} else {
- set_irq_handler(virq, handle_edge_irq);
+ desc->handle_irq = handle_edge_irq;
}
/* only EXT IRQ senses are programmable on ipic