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| author | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:32:00 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:32:00 +0100 |
| commit | 7d409d6057c7244f8757ce15245f6df27271be0c (patch) | |
| tree | a0eda73330dce6ee77f210c12deb3784b398f1f1 /arch/x86/pci | |
| parent | PCI: remove default PCI expansion ROM memory allocation (diff) | |
| download | linux-7d409d6057c7244f8757ce15245f6df27271be0c.tar.xz linux-7d409d6057c7244f8757ce15245f6df27271be0c.zip | |
x86: add some pirq debugging
we use a few static mapping rules in our pirq routing functions,
and for example regression f3ac84324fd94 was due to the pirq
being out of range of the remapping array. Put in a few
WARN_ON_ONCE() lines so that we get notified about any such
out-of-bound incidents.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/pci')
| -rw-r--r-- | arch/x86/pci/irq.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/arch/x86/pci/irq.c b/arch/x86/pci/irq.c index 88d8f5c0ecb5..ee524ca5f8c0 100644 --- a/arch/x86/pci/irq.c +++ b/arch/x86/pci/irq.c @@ -200,6 +200,7 @@ static int pirq_ali_get(struct pci_dev *router, struct pci_dev *dev, int pirq) { static const unsigned char irqmap[16] = { 0, 9, 3, 10, 4, 5, 7, 6, 1, 11, 0, 12, 0, 14, 0, 15 }; + WARN_ON_ONCE(pirq >= 16); return irqmap[read_config_nybble(router, 0x48, pirq-1)]; } @@ -207,7 +208,8 @@ static int pirq_ali_set(struct pci_dev *router, struct pci_dev *dev, int pirq, i { static const unsigned char irqmap[16] = { 0, 8, 0, 2, 4, 5, 7, 6, 0, 1, 3, 9, 11, 0, 13, 15 }; unsigned int val = irqmap[irq]; - + + WARN_ON_ONCE(pirq >= 16); if (val) { write_config_nybble(router, 0x48, pirq-1, val); return 1; @@ -257,12 +259,16 @@ static int pirq_via_set(struct pci_dev *router, struct pci_dev *dev, int pirq, i static int pirq_via586_get(struct pci_dev *router, struct pci_dev *dev, int pirq) { static const unsigned int pirqmap[5] = { 3, 2, 5, 1, 1 }; + + WARN_ON_ONCE(pirq >= 5); return read_config_nybble(router, 0x55, pirqmap[pirq-1]); } static int pirq_via586_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) { static const unsigned int pirqmap[5] = { 3, 2, 5, 1, 1 }; + + WARN_ON_ONCE(pirq >= 5); write_config_nybble(router, 0x55, pirqmap[pirq-1], irq); return 1; } @@ -275,12 +281,16 @@ static int pirq_via586_set(struct pci_dev *router, struct pci_dev *dev, int pirq static int pirq_ite_get(struct pci_dev *router, struct pci_dev *dev, int pirq) { static const unsigned char pirqmap[4] = { 1, 0, 2, 3 }; + + WARN_ON_ONCE(pirq >= 4); return read_config_nybble(router,0x43, pirqmap[pirq-1]); } static int pirq_ite_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) { static const unsigned char pirqmap[4] = { 1, 0, 2, 3 }; + + WARN_ON_ONCE(pirq >= 4); write_config_nybble(router, 0x43, pirqmap[pirq-1], irq); return 1; } @@ -419,6 +429,7 @@ static int pirq_sis_set(struct pci_dev *router, struct pci_dev *dev, int pirq, i static int pirq_vlsi_get(struct pci_dev *router, struct pci_dev *dev, int pirq) { + WARN_ON_ONCE(pirq >= 9); if (pirq > 8) { printk(KERN_INFO "VLSI router pirq escape (%d)\n", pirq); return 0; @@ -428,6 +439,7 @@ static int pirq_vlsi_get(struct pci_dev *router, struct pci_dev *dev, int pirq) static int pirq_vlsi_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) { + WARN_ON_ONCE(pirq >= 9); if (pirq > 8) { printk(KERN_INFO "VLSI router pirq escape (%d)\n", pirq); return 0; |