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authorIngo Molnar <mingo@elte.hu>2006-06-29 02:24:52 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-29 10:26:24 -0700
commitdae8620421833bb2e9a01c4ccc42bdc3759b81df (patch)
treea57ec739c39032d2c5bbb94951059706053cf484 /arch/i386/kernel/irq.c
parent6a6de9ef5850d063c3d3fb50784bfe3a6d0712c6 (diff)
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[PATCH] genirq MSI fixes
This is a fixed up and cleaned up replacement for genirq-msi-fixes.patch, which should solve the i386 4KSTACKS problem. I also added Ben's idea of pushing the __do_IRQ() check into generic_handle_irq(). I booted this with MSI enabled, but i only have MSI devices, not MSI-X devices. I'd still expect MSI-X to work now. irqchip migration helper: call __do_IRQ() if a descriptor is attached to an irqtype-style controller. This also fixes MSI-X IRQ handling on i386 and x86_64. Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Roland Dreier <rolandd@cisco.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386/kernel/irq.c')
-rw-r--r--arch/i386/kernel/irq.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/i386/kernel/irq.c b/arch/i386/kernel/irq.c
index 3336cef..16b4917 100644
--- a/arch/i386/kernel/irq.c
+++ b/arch/i386/kernel/irq.c
@@ -82,6 +82,10 @@ fastcall unsigned int do_IRQ(struct pt_regs *regs)
}
#endif
+ if (!irq_desc[irq].handle_irq) {
+ __do_IRQ(irq, regs);
+ goto out_exit;
+ }
#ifdef CONFIG_4KSTACKS
curctx = (union irq_ctx *) current_thread_info();
@@ -121,6 +125,7 @@ fastcall unsigned int do_IRQ(struct pt_regs *regs)
#endif
__do_IRQ(irq, regs);
+out_exit:
irq_exit();
return 1;