This is a note to let you know that I've just added the patch titled
sfi: table irq 0xFF means 'no interrupt'
to the 3.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
sfi-table-irq-0xff-means-no-interrupt.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <sta...@kernel.org> know about it.
>From a94cc4e6c0a26a7c8f79a432ab2c89534aa674d5 Mon Sep 17 00:00:00 2001
From: "Kirill A. Shutemov" <kirill.shute...@linux.intel.com>
Date: Fri, 26 Aug 2011 12:20:59 +0100
Subject: sfi: table irq 0xFF means 'no interrupt'
From: "Kirill A. Shutemov" <kirill.shute...@linux.intel.com>
commit a94cc4e6c0a26a7c8f79a432ab2c89534aa674d5 upstream.
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.shute...@linux.intel.com>
Signed-off-by: Alan Cox <a...@linux.intel.com>
Signed-off-by: Linus Torvalds <torva...@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gre...@suse.de>
---
arch/x86/platform/mrst/mrst.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/arch/x86/platform/mrst/mrst.c
+++ b/arch/x86/platform/mrst/mrst.c
@@ -689,7 +689,9 @@ static int __init sfi_parse_devs(struct
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 */
Patches currently in stable-queue which might be from
kirill.shute...@linux.intel.com are
queue-3.0/sfi-table-irq-0xff-means-no-interrupt.patch
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