x86/mce: Make timer handling more robust

Erik reported that on a preproduction hardware a CMCI storm triggers the
BUG_ON in add_timer_on(). The reason is that the per CPU MCE timer is
started by the CMCI logic before the MCE CPU hotplug callback starts the
timer with add_timer_on(). So the timer is already queued which triggers
the BUG.

Using add_timer_on() is pretty pointless in this code because the timer is
strictlty per CPU, initialized as pinned and all operations which arm the
timer happen on the CPU to which the timer belongs.

Simplify the whole machinery by using mod_timer() instead of add_timer_on()
which avoids the problem because mod_timer() can handle already queued
timers. Use __start_timer() everywhere so the earliest armed expiry time is
preserved.

Reported-by: Erik Veijola <erik.veijola@intel.com>
Tested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Borislav Petkov <bp@alien8.de>
Cc: Tony Luck <tony.luck@intel.com>
Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701310936080.3457@nanos
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

path: root/sound/soc/adi/Kconfig

config SND_SOC_ADI
	tristate "Audio support for Analog Devices reference designs"
	depends on MICROBLAZE || ARCH_ZYNQ || COMPILE_TEST
	help
	  Audio support for various reference designs by Analog Devices.

config SND_SOC_ADI_AXI_I2S
	tristate "AXI-I2S support"
	depends on SND_SOC_ADI
	select SND_SOC_GENERIC_DMAENGINE_PCM
	select REGMAP_MMIO
	help
	  ASoC driver for the Analog Devices AXI-I2S softcore peripheral.

config SND_SOC_ADI_AXI_SPDIF
	tristate "AXI-SPDIF support"
	depends on SND_SOC_ADI
	select SND_SOC_GENERIC_DMAENGINE_PCM
	select REGMAP_MMIO
	help
	  ASoC driver for the Analog Devices AXI-SPDIF softcore peripheral.