This is a note to let you know that I've just added the patch titled
x86, intel-mid: Create IRQs for APB timers and RTC timers
to the 3.17-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:
x86-intel-mid-create-irqs-for-apb-timers-and-rtc-timers.patch
and it can be found in the queue-3.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f18298595aefa2c836a128ec6e0f75f39965dd81 Mon Sep 17 00:00:00 2001
From: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
Date: Mon, 27 Oct 2014 13:21:32 +0800
Subject: x86, intel-mid: Create IRQs for APB timers and RTC timers
From: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
commit f18298595aefa2c836a128ec6e0f75f39965dd81 upstream.
Intel MID platforms has no legacy interrupts, so no IRQ descriptors
preallocated. We need to call mp_map_gsi_to_irq() to create IRQ
descriptors for APB timers and RTC timers, otherwise it may cause
invalid memory access as:
[ 0.116839] BUG: unable to handle kernel NULL pointer dereference at
0000003a
[ 0.123803] IP: [<c1071c0e>] setup_irq+0xf/0x4d
Tested-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Joerg Roedel <joro@xxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Rafael J. Wysocki <rjw@xxxxxxxxxxxxx>
Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Yinghai Lu <yinghai@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: David Cohen <david.a.cohen@xxxxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1414387308-27148-3-git-send-email-jiang.liu@xxxxxxxxxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/apb_timer.c | 2 --
arch/x86/platform/intel-mid/sfi.c | 2 ++
2 files changed, 2 insertions(+), 2 deletions(-)
--- a/arch/x86/kernel/apb_timer.c
+++ b/arch/x86/kernel/apb_timer.c
@@ -185,8 +185,6 @@ static void apbt_setup_irq(struct apbt_d
irq_modify_status(adev->irq, 0, IRQ_MOVE_PCNTXT);
irq_set_affinity(adev->irq, cpumask_of(adev->cpu));
- /* APB timer irqs are set up as mp_irqs, timer is edge type */
- __irq_set_handler(adev->irq, handle_edge_irq, 0, "edge");
}
/* Should be called with per cpu */
--- a/arch/x86/platform/intel-mid/sfi.c
+++ b/arch/x86/platform/intel-mid/sfi.c
@@ -106,6 +106,7 @@ int __init sfi_parse_mtmr(struct sfi_tab
mp_irq.dstapic = MP_APIC_ALL;
mp_irq.dstirq = pentry->irq;
mp_save_irq(&mp_irq);
+ mp_map_gsi_to_irq(pentry->irq, IOAPIC_MAP_ALLOC);
}
return 0;
@@ -176,6 +177,7 @@ int __init sfi_parse_mrtc(struct sfi_tab
mp_irq.dstapic = MP_APIC_ALL;
mp_irq.dstirq = pentry->irq;
mp_save_irq(&mp_irq);
+ mp_map_gsi_to_irq(pentry->irq, IOAPIC_MAP_ALLOC);
}
return 0;
}
Patches currently in stable-queue which might be from jiang.liu@xxxxxxxxxxxxxxx are
queue-3.17/x86-acpi-do-not-translate-gsi-number-if-ioapic-is-disabled.patch
queue-3.17/x86-intel-mid-create-irqs-for-apb-timers-and-rtc-timers.patch
queue-3.17/acpi-irq-x86-return-irq-instead-of-gsi-in-mp_register_gsi.patch
--
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