From f18298595aefa2c836a128ec6e0f75f39965dd81 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Mon, 27 Oct 2014 13:21:32 +0800 Subject: x86, intel-mid: Create IRQs for APB timers and RTC timers 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: [] setup_irq+0xf/0x4d Tested-by: Andy Shevchenko Signed-off-by: Jiang Liu Cc: Konrad Rzeszutek Wilk Cc: Tony Luck Cc: Joerg Roedel Cc: Greg Kroah-Hartman Cc: H. Peter Anvin Cc: Benjamin Herrenschmidt Cc: Rafael J. Wysocki Cc: Bjorn Helgaas Cc: Randy Dunlap Cc: Yinghai Lu Cc: Borislav Petkov Cc: David Cohen Cc: # 3.17 Link: http://lkml.kernel.org/r/1414387308-27148-3-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar --- arch/x86/platform/intel-mid/sfi.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/x86/platform') diff --git a/arch/x86/platform/intel-mid/sfi.c b/arch/x86/platform/intel-mid/sfi.c index 3c53a90..c14ad34 100644 --- 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_table_header *table) 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_table_header *table) 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; } -- cgit v1.1