From 54c5848c214922e2c3bf07df6c5789767ff93893 Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Sat, 2 Jun 2018 22:16:38 +0200 Subject: [PATCH] Thermal: Intel SoC DTS: Translate IO-APIC GSI number to linux irq number The Intel SoC DTS uses a hardcoded GSI number, before this commit it was passing it to request_irq as if it were a linux irq number, but there is no 1:1 mapping so in essence it was requesting a random interrupt. Besides this causing the DTS driver to not actually get an interrupt if the thermal thresholds are exceeded this also is causing an interrupt conflict on some devices since the linux irq 86 which is being requested is already in use, leading to oopses like this: genirq: Flags mismatch irq 86. 00002001 (soc_dts) vs. 00000083 (volume_down) CPU: 0 PID: 601 Comm: systemd-udevd Tainted: G C OE 4.17.0-rc6+ #45 Hardware name: Insyde i86/Type2 - Board Product Name, BIOS CHUWI.D86JLBNR03 01/14/2015 Call Trace: dump_stack+0x5c/0x80 __setup_irq.cold.50+0x4e/0xac ? request_threaded_irq+0xad/0x160 request_threaded_irq+0xf5/0x160 ? 0xffffffffc0a93000 intel_soc_thermal_init+0x74/0x1000 [intel_soc_dts_thermal] This commit makes the intel_soc_dts_thermal.c code call acpi_register_gsi() to translate the hardcoded IO-APIC GSI number (86) to a linux irq, so that the dts code uses the right interrupt and we no longer get an oops about an irq conflict. Signed-off-by: Hans de Goede Signed-off-by: Zhang Rui --- drivers/thermal/Kconfig | 2 +- drivers/thermal/intel_soc_dts_thermal.c | 26 ++++++++++++++++++++++--- 2 files changed, 24 insertions(+), 4 deletions(-) diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index 82979880f985..0e69edc77d18 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -360,7 +360,7 @@ config INTEL_SOC_DTS_IOSF_CORE config INTEL_SOC_DTS_THERMAL tristate "Intel SoCs DTS thermal driver" - depends on X86 && PCI + depends on X86 && PCI && ACPI select INTEL_SOC_DTS_IOSF_CORE select THERMAL_WRITABLE_TRIPS help diff --git a/drivers/thermal/intel_soc_dts_thermal.c b/drivers/thermal/intel_soc_dts_thermal.c index c27868b2c6af..1e47511a6bd5 100644 --- a/drivers/thermal/intel_soc_dts_thermal.c +++ b/drivers/thermal/intel_soc_dts_thermal.c @@ -15,6 +15,7 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include #include #include #include @@ -31,6 +32,7 @@ MODULE_PARM_DESC(crit_offset, /* IRQ 86 is a fixed APIC interrupt for BYT DTS Aux threshold notifications */ #define BYT_SOC_DTS_APIC_IRQ 86 +static int soc_dts_thres_gsi; static int soc_dts_thres_irq; static struct intel_soc_dts_sensors *soc_dts; @@ -65,7 +67,21 @@ static int __init intel_soc_thermal_init(void) return err; } - soc_dts_thres_irq = (int)match_cpu->driver_data; + soc_dts_thres_gsi = (int)match_cpu->driver_data; + if (soc_dts_thres_gsi) { + /* + * Note the flags here MUST match the firmware defaults, rather + * then the request_irq flags, otherwise we get an EBUSY error. + */ + soc_dts_thres_irq = acpi_register_gsi(NULL, soc_dts_thres_gsi, + ACPI_LEVEL_SENSITIVE, + ACPI_ACTIVE_LOW); + if (soc_dts_thres_irq < 0) { + pr_warn("intel_soc_dts: Could not get IRQ for GSI %d, err %d\n", + soc_dts_thres_gsi, soc_dts_thres_irq); + soc_dts_thres_irq = 0; + } + } if (soc_dts_thres_irq) { err = request_threaded_irq(soc_dts_thres_irq, NULL, @@ -90,8 +106,10 @@ static int __init intel_soc_thermal_init(void) return 0; error_trips: - if (soc_dts_thres_irq) + if (soc_dts_thres_irq) { free_irq(soc_dts_thres_irq, soc_dts); + acpi_unregister_gsi(soc_dts_thres_gsi); + } intel_soc_dts_iosf_exit(soc_dts); return err; @@ -99,8 +117,10 @@ static int __init intel_soc_thermal_init(void) static void __exit intel_soc_thermal_exit(void) { - if (soc_dts_thres_irq) + if (soc_dts_thres_irq) { free_irq(soc_dts_thres_irq, soc_dts); + acpi_unregister_gsi(soc_dts_thres_gsi); + } intel_soc_dts_iosf_exit(soc_dts); }