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| author | Ingo Molnar <mingo@elte.hu> | 2006-06-29 02:24:52 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-29 10:26:24 -0700 |
| commit | dae8620421833bb2e9a01c4ccc42bdc3759b81df (patch) | |
| tree | a57ec739c39032d2c5bbb94951059706053cf484 /arch/i386/kernel | |
| parent | 6a6de9ef5850d063c3d3fb50784bfe3a6d0712c6 (diff) | |
| download | blackbird-op-linux-dae8620421833bb2e9a01c4ccc42bdc3759b81df.tar.gz blackbird-op-linux-dae8620421833bb2e9a01c4ccc42bdc3759b81df.zip | |
[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')
| -rw-r--r-- | arch/i386/kernel/irq.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/i386/kernel/irq.c b/arch/i386/kernel/irq.c index 3336cef9605a..16b491703967 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; |
