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sfi: table irq 0xFF means 'no interrupt'

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According to the SFI specification irq number 0xFF means device has no
interrupt or interrupt attached via GPIO.

Currently, we don't handle this special case and set irq field in
*_board_info structs to 255.  It leads to confusion in some drivers.
Accelerometer driver tries to register interrupt 255, fails and prints
"Cannot get IRQ" to dmesg.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Kirill A. Shutemov 2011-08-26 12:20:59 +01:00 committed by Linus Torvalds
parent 1e8d4e8be2
commit a94cc4e6c0
1 changed files with 3 additions and 1 deletions
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4
arch/x86/platform/mrst/mrst.c
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@ -689,7 +689,9 @@ static int __init sfi_parse_devs(struct sfi_table_header *table)
irq_attr.trigger = 1;
irq_attr.polarity = 1;
io_apic_set_pci_routing(NULL, pentry->irq, &irq_attr);
}
} else
pentry->irq = 0; /* No irq */
switch (pentry->type) {
case SFI_DEV_TYPE_IPC:
/* ID as IRQ is a hack that will go away */