Commit a94cc4e6 authored Aug 26, 2011 by Kirill A. Shutemov Committed by Linus Torvalds Aug 26, 2011

sfi: table irq 0xFF means 'no interrupt'



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>

parent 1e8d4e8b

arch/x86/platform/mrst/mrst.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -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 */