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authorRusty Russell <rusty@rustcorp.com.au>2009-03-09 10:06:28 -0600
committerRusty Russell <rusty@rustcorp.com.au>2009-03-09 10:06:29 +1030
commit6db6a5f3ae2ca6b874b0fd97ae16fdc9b5cdd6cc (patch)
tree567ab7d3593f6ab63fecfb8c9797fb4efda67ea7 /drivers/lguest
parentcbd88c8e6f5cdb8d4b9af01df825305200240382 (diff)
lguest: fix for CONFIG_SPARSE_IRQ=y
Impact: remove lots of lguest boot WARN_ON() when CONFIG_SPARSE_IRQ=y We now need to call irq_to_desc_alloc_cpu() before set_irq_chip_and_handler_name(), but we can't do that from init_IRQ (no kmalloc available). So do it as we use interrupts instead. Also means we only alloc for irqs we use, which was the intent of CONFIG_SPARSE_IRQ anyway. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Ingo Molnar <mingo@redhat.com>
Diffstat (limited to 'drivers/lguest')
-rw-r--r--drivers/lguest/lguest_device.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/lguest/lguest_device.c b/drivers/lguest/lguest_device.c
index b4d44e571d76..8132533d71f9 100644
--- a/drivers/lguest/lguest_device.c
+++ b/drivers/lguest/lguest_device.c
@@ -212,6 +212,9 @@ static void lg_notify(struct virtqueue *vq)
hcall(LHCALL_NOTIFY, lvq->config.pfn << PAGE_SHIFT, 0, 0);
}
+/* An extern declaration inside a C file is bad form. Don't do it. */
+extern void lguest_setup_irq(unsigned int irq);
+
/* This routine finds the first virtqueue described in the configuration of
* this device and sets it up.
*
@@ -266,6 +269,9 @@ static struct virtqueue *lg_find_vq(struct virtio_device *vdev,
goto unmap;
}
+ /* Make sure the interrupt is allocated. */
+ lguest_setup_irq(lvq->config.irq);
+
/* Tell the interrupt for this virtqueue to go to the virtio_ring
* interrupt handler. */
/* FIXME: We used to have a flag for the Host to tell us we could use