Merge 4.4.191 into android-4.4-p

Changes in 4.4.191
	HID: Add 044f:b320 ThrustMaster, Inc. 2 in 1 DT
	MIPS: kernel: only use i8253 clocksource with periodic clockevent
	netfilter: ebtables: fix a memory leak bug in compat
	bonding: Force slave speed check after link state recovery for 802.3ad
	can: dev: call netif_carrier_off() in register_candev()
	st21nfca_connectivity_event_received: null check the allocation
	st_nci_hci_connectivity_event_received: null check the allocation
	ASoC: ti: davinci-mcasp: Correct slot_width posed constraint
	net: usb: qmi_wwan: Add the BroadMobi BM818 card
	isdn: mISDN: hfcsusb: Fix possible null-pointer dereferences in start_isoc_chain()
	isdn: hfcsusb: Fix mISDN driver crash caused by transfer buffer on the stack
	perf bench numa: Fix cpu0 binding
	can: sja1000: force the string buffer NULL-terminated
	can: peak_usb: force the string buffer NULL-terminated
	NFSv4: Fix a potential sleep while atomic in nfs4_do_reclaim()
	net: cxgb3_main: Fix a resource leak in a error path in 'init_one()'
	net: hisilicon: make hip04_tx_reclaim non-reentrant
	net: hisilicon: fix hip04-xmit never return TX_BUSY
	net: hisilicon: Fix dma_map_single failed on arm64
	libata: add SG safety checks in SFF pio transfers
	selftests: kvm: Adding config fragments
	HID: wacom: correct misreported EKR ring values
	Revert "dm bufio: fix deadlock with loop device"
	userfaultfd_release: always remove uffd flags and clear vm_userfaultfd_ctx
	x86/retpoline: Don't clobber RFLAGS during CALL_NOSPEC on i386
	x86/apic: Handle missing global clockevent gracefully
	x86/boot: Save fields explicitly, zero out everything else
	x86/boot: Fix boot regression caused by bootparam sanitizing
	dm btree: fix order of block initialization in btree_split_beneath
	dm space map metadata: fix missing store of apply_bops() return value
	dm table: fix invalid memory accesses with too high sector number
	cgroup: Disable IRQs while holding css_set_lock
	GFS2: don't set rgrp gl_object until it's inserted into rgrp tree
	net: arc_emac: fix koops caused by sk_buff free
	vhost-net: set packet weight of tx polling to 2 * vq size
	vhost_net: use packet weight for rx handler, too
	vhost_net: introduce vhost_exceeds_weight()
	vhost: introduce vhost_exceeds_weight()
	vhost_net: fix possible infinite loop
	vhost: scsi: add weight support
	siphash: add cryptographically secure PRF
	siphash: implement HalfSipHash1-3 for hash tables
	inet: switch IP ID generator to siphash
	netfilter: ctnetlink: don't use conntrack/expect object addresses as id
	netfilter: conntrack: Use consistent ct id hash calculation
	Revert "perf test 6: Fix missing kvm module load for s390"
	x86/pm: Introduce quirk framework to save/restore extra MSR registers around suspend/resume
	x86/CPU/AMD: Clear RDRAND CPUID bit on AMD family 15h/16h
	scsi: ufs: Fix NULL pointer dereference in ufshcd_config_vreg_hpm()
	dmaengine: ste_dma40: fix unneeded variable warning
	usb: gadget: composite: Clear "suspended" on reset/disconnect
	usb: host: fotg2: restart hcd after port reset
	tools: hv: fix KVP and VSS daemons exit code
	watchdog: bcm2835_wdt: Fix module autoload
	tcp: fix tcp_rtx_queue_tail in case of empty retransmit queue
	ALSA: usb-audio: Fix a stack buffer overflow bug in check_input_term
	ALSA: usb-audio: Fix an OOB bug in parse_audio_mixer_unit
	tcp: make sure EPOLLOUT wont be missed
	ALSA: seq: Fix potential concurrent access to the deleted pool
	KVM: x86: Don't update RIP or do single-step on faulting emulation
	x86/apic: Do not initialize LDR and DFR for bigsmp
	x86/apic: Include the LDR when clearing out APIC registers
	usb-storage: Add new JMS567 revision to unusual_devs
	USB: cdc-wdm: fix race between write and disconnect due to flag abuse
	usb: host: ohci: fix a race condition between shutdown and irq
	USB: storage: ums-realtek: Update module parameter description for auto_delink_en
	USB: storage: ums-realtek: Whitelist auto-delink support
	ptrace,x86: Make user_64bit_mode() available to 32-bit builds
	uprobes/x86: Fix detection of 32-bit user mode
	mmc: sdhci-of-at91: add quirk for broken HS200
	mmc: core: Fix init of SD cards reporting an invalid VDD range
	stm class: Fix a double free of stm_source_device
	VMCI: Release resource if the work is already queued
	Revert "cfg80211: fix processing world regdomain when non modular"
	mac80211: fix possible sta leak
	x86/ptrace: fix up botched merge of spectrev1 fix
	Linux 4.4.191

Change-Id: Ic9a2554d2ba45f9c17478f1dfb5115e1a3bc3bd7
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

1 files changed, 57 insertions, 15 deletions

diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index cc6c33249850..80c94fc8ad5a 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -593,7 +593,7 @@ static __initdata unsigned long lapic_cal_pm1, lapic_cal_pm2;
 static __initdata unsigned long lapic_cal_j1, lapic_cal_j2;
 
 /*
- * Temporary interrupt handler.
+ * Temporary interrupt handler and polled calibration function.
  */
 static void __init lapic_cal_handler(struct clock_event_device *dev)
 {
@@ -677,7 +677,8 @@ calibrate_by_pmtimer(long deltapm, long *delta, long *deltatsc)
 static int __init calibrate_APIC_clock(void)
 {
 	struct clock_event_device *levt = this_cpu_ptr(&lapic_events);
-	void (*real_handler)(struct clock_event_device *dev);
+	u64 tsc_perj = 0, tsc_start = 0;
+	unsigned long jif_start;
 	unsigned long deltaj;
 	long delta, deltatsc;
 	int pm_referenced = 0;
@@ -706,28 +707,64 @@ static int __init calibrate_APIC_clock(void)
 	apic_printk(APIC_VERBOSE, "Using local APIC timer interrupts.\n"
 		    "calibrating APIC timer ...\n");
 
+	/*
+	 * There are platforms w/o global clockevent devices. Instead of
+	 * making the calibration conditional on that, use a polling based
+	 * approach everywhere.
+	 */
 	local_irq_disable();
 
-	/* Replace the global interrupt handler */
-	real_handler = global_clock_event->event_handler;
-	global_clock_event->event_handler = lapic_cal_handler;
-
 	/*
 	 * Setup the APIC counter to maximum. There is no way the lapic
 	 * can underflow in the 100ms detection time frame
 	 */
 	__setup_APIC_LVTT(0xffffffff, 0, 0);
 
-	/* Let the interrupts run */
+	/*
+	 * Methods to terminate the calibration loop:
+	 *  1) Global clockevent if available (jiffies)
+	 *  2) TSC if available and frequency is known
+	 */
+	jif_start = READ_ONCE(jiffies);
+
+	if (tsc_khz) {
+		tsc_start = rdtsc();
+		tsc_perj = div_u64((u64)tsc_khz * 1000, HZ);
+	}
+
+	/*
+	 * Enable interrupts so the tick can fire, if a global
+	 * clockevent device is available
+	 */
 	local_irq_enable();
 
-	while (lapic_cal_loops <= LAPIC_CAL_LOOPS)
-		cpu_relax();
+	while (lapic_cal_loops <= LAPIC_CAL_LOOPS) {
+		/* Wait for a tick to elapse */
+		while (1) {
+			if (tsc_khz) {
+				u64 tsc_now = rdtsc();
+				if ((tsc_now - tsc_start) >= tsc_perj) {
+					tsc_start += tsc_perj;
+					break;
+				}
+			} else {
+				unsigned long jif_now = READ_ONCE(jiffies);
 
-	local_irq_disable();
+				if (time_after(jif_now, jif_start)) {
+					jif_start = jif_now;
+					break;
+				}
+			}
+			cpu_relax();
+		}
 
-	/* Restore the real event handler */
-	global_clock_event->event_handler = real_handler;
+		/* Invoke the calibration routine */
+		local_irq_disable();
+		lapic_cal_handler(NULL);
+		local_irq_enable();
+	}
+
+	local_irq_disable();
 
 	/* Build delta t1-t2 as apic timer counts down */
 	delta = lapic_cal_t1 - lapic_cal_t2;
@@ -778,10 +815,11 @@ static int __init calibrate_APIC_clock(void)
 	levt->features &= ~CLOCK_EVT_FEAT_DUMMY;
 
 	/*
-	 * PM timer calibration failed or not turned on
-	 * so lets try APIC timer based calibration
+	 * PM timer calibration failed or not turned on so lets try APIC
+	 * timer based calibration, if a global clockevent device is
+	 * available.
 	 */
-	if (!pm_referenced) {
+	if (!pm_referenced && global_clock_event) {
 		apic_printk(APIC_VERBOSE, "... verify APIC timer\n");
 
 		/*
@@ -993,6 +1031,10 @@ void clear_local_APIC(void)
 	apic_write(APIC_LVT0, v | APIC_LVT_MASKED);
 	v = apic_read(APIC_LVT1);
 	apic_write(APIC_LVT1, v | APIC_LVT_MASKED);
+	if (!x2apic_enabled()) {
+		v = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
+		apic_write(APIC_LDR, v);
+	}
 	if (maxlvt >= 4) {
 		v = apic_read(APIC_LVTPC);
 		apic_write(APIC_LVTPC, v | APIC_LVT_MASKED);