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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-01-12 12:37:27 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-01-12 12:37:27 -0800 |
| commit | bcf8a3dfcb274cf6654a19e12e244f3af8c0d355 (patch) | |
| tree | f1d0e0f36c0575a9202750aff65ba17ce91bc437 /arch | |
| parent | 61bd5e5683244a564ecfe31c73575ee0bc708ccc (diff) | |
| parent | b6c96c0214138186f495e3ee73737c6fc5e4efa2 (diff) | |
| download | linux-bcf8a3dfcb274cf6654a19e12e244f3af8c0d355.tar.gz | |
Merge tag 'to-linus' of git://github.com/rustyrussell/linux
* tag 'to-linus' of git://github.com/rustyrussell/linux: (24 commits) lguest: Make sure interrupt is allocated ok by lguest_setup_irq lguest: move the lguest tool to the tools directory lguest: switch segment-voodoo-numbers to readable symbols virtio: balloon: Add freeze, restore handlers to support S4 virtio: balloon: Move vq initialization into separate function virtio: net: Add freeze, restore handlers to support S4 virtio: net: Move vq and vq buf removal into separate function virtio: net: Move vq initialization into separate function virtio: blk: Add freeze, restore handlers to support S4 virtio: blk: Move vq initialization to separate function virtio: console: Disable callbacks for virtqueues at start of S4 freeze virtio: console: Add freeze and restore handlers to support S4 virtio: console: Move vq and vq buf removal into separate functions virtio: pci: add PM notification handlers for restore, freeze, thaw, poweroff virtio: pci: switch to new PM API virtio_blk: fix config handler race virtio: add debugging if driver doesn't kick. virtio: expose added descriptors immediately. virtio: avoid modulus operation. virtio: support unlocked queue kick ...
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/lguest/boot.c | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c index cf4603ba866f..642d8805bc1b 100644 --- a/arch/x86/lguest/boot.c +++ b/arch/x86/lguest/boot.c @@ -856,18 +856,23 @@ static void __init lguest_init_IRQ(void) } /* - * With CONFIG_SPARSE_IRQ, interrupt descriptors are allocated as-needed, so - * rather than set them in lguest_init_IRQ we are called here every time an - * lguest device needs an interrupt. - * - * FIXME: irq_alloc_desc_at() can fail due to lack of memory, we should - * pass that up! + * Interrupt descriptors are allocated as-needed, but low-numbered ones are + * reserved by the generic x86 code. So we ignore irq_alloc_desc_at if it + * tells us the irq is already used: other errors (ie. ENOMEM) we take + * seriously. */ -void lguest_setup_irq(unsigned int irq) +int lguest_setup_irq(unsigned int irq) { - irq_alloc_desc_at(irq, 0); + int err; + + /* Returns -ve error or vector number. */ + err = irq_alloc_desc_at(irq, 0); + if (err < 0 && err != -EEXIST) + return err; + irq_set_chip_and_handler_name(irq, &lguest_irq_controller, handle_level_irq, "level"); + return 0; } /* |