scftorture: Count single_rpc offline failures in statistics outputgrafted

scf_torture_stats_print() aggregates each invoker thread's counters
into a local scf_statistics structure before printing, but the
n_single_rpc_ofl field is missing from the aggregation loop.  As a
result, the "single_rpc_ofl" value printed in the statistics line is
always zero, even when smp_call_function_single() invocations for the
RPC test have failed due to offline CPUs and been counted by the
invoker threads.

Add the missing accumulation so that the printed value reflects the
actual counts.

Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

1 files changed, 209 insertions, 0 deletions

diff --git a/drivers/input/serio/ambakmi.c b/drivers/input/serio/ambakmi.c
new file mode 100644
index 000000000..046b8f388
--- /dev/null
+++ b/drivers/input/serio/ambakmi.c
@@ -0,0 +1,209 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  linux/drivers/input/serio/ambakmi.c
+ *
+ *  Copyright (C) 2000-2003 Deep Blue Solutions Ltd.
+ *  Copyright (C) 2002 Russell King.
+ */
+#include <linux/module.h>
+#include <linux/serio.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/amba/bus.h>
+#include <linux/amba/kmi.h>
+#include <linux/clk.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+
+#define KMI_BASE	(kmi->base)
+
+struct amba_kmi_port {
+	struct serio		*io;
+	struct clk		*clk;
+	void __iomem		*base;
+	unsigned int		irq;
+	unsigned int		divisor;
+	unsigned int		open;
+};
+
+static irqreturn_t amba_kmi_int(int irq, void *dev_id)
+{
+	struct amba_kmi_port *kmi = dev_id;
+	unsigned int status = readb(KMIIR);
+	int handled = IRQ_NONE;
+
+	while (status & KMIIR_RXINTR) {
+		serio_interrupt(kmi->io, readb(KMIDATA), 0);
+		status = readb(KMIIR);
+		handled = IRQ_HANDLED;
+	}
+
+	return handled;
+}
+
+static int amba_kmi_write(struct serio *io, unsigned char val)
+{
+	struct amba_kmi_port *kmi = io->port_data;
+	unsigned int timeleft = 10000; /* timeout in 100ms */
+
+	while ((readb(KMISTAT) & KMISTAT_TXEMPTY) == 0 && --timeleft)
+		udelay(10);
+
+	if (timeleft)
+		writeb(val, KMIDATA);
+
+	return timeleft ? 0 : SERIO_TIMEOUT;
+}
+
+static int amba_kmi_open(struct serio *io)
+{
+	struct amba_kmi_port *kmi = io->port_data;
+	unsigned int divisor;
+	int ret;
+
+	ret = clk_prepare_enable(kmi->clk);
+	if (ret)
+		goto out;
+
+	divisor = clk_get_rate(kmi->clk) / 8000000 - 1;
+	writeb(divisor, KMICLKDIV);
+	writeb(KMICR_EN, KMICR);
+
+	ret = request_irq(kmi->irq, amba_kmi_int, IRQF_SHARED, "kmi-pl050",
+			  kmi);
+	if (ret) {
+		printk(KERN_ERR "kmi: failed to claim IRQ%d\n", kmi->irq);
+		writeb(0, KMICR);
+		goto clk_disable;
+	}
+
+	writeb(KMICR_EN | KMICR_RXINTREN, KMICR);
+
+	return 0;
+
+ clk_disable:
+	clk_disable_unprepare(kmi->clk);
+ out:
+	return ret;
+}
+
+static void amba_kmi_close(struct serio *io)
+{
+	struct amba_kmi_port *kmi = io->port_data;
+
+	writeb(0, KMICR);
+
+	free_irq(kmi->irq, kmi);
+	clk_disable_unprepare(kmi->clk);
+}
+
+static int amba_kmi_probe(struct amba_device *dev,
+	const struct amba_id *id)
+{
+	struct amba_kmi_port *kmi;
+	struct serio *io;
+	int ret;
+
+	ret = amba_request_regions(dev, NULL);
+	if (ret)
+		return ret;
+
+	kmi = kzalloc_obj(*kmi);
+	io = kzalloc_obj(*io);
+	if (!kmi || !io) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+
+	io->id.type	= SERIO_8042;
+	io->write	= amba_kmi_write;
+	io->open	= amba_kmi_open;
+	io->close	= amba_kmi_close;
+	strscpy(io->name, dev_name(&dev->dev), sizeof(io->name));
+	strscpy(io->phys, dev_name(&dev->dev), sizeof(io->phys));
+	io->port_data	= kmi;
+	io->dev.parent	= &dev->dev;
+
+	kmi->io		= io;
+	kmi->base	= ioremap(dev->res.start, resource_size(&dev->res));
+	if (!kmi->base) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	kmi->clk = clk_get(&dev->dev, "KMIREFCLK");
+	if (IS_ERR(kmi->clk)) {
+		ret = PTR_ERR(kmi->clk);
+		goto unmap;
+	}
+
+	kmi->irq = dev->irq[0];
+	amba_set_drvdata(dev, kmi);
+
+	serio_register_port(kmi->io);
+	return 0;
+
+ unmap:
+	iounmap(kmi->base);
+ out:
+	kfree(kmi);
+	kfree(io);
+	amba_release_regions(dev);
+	return ret;
+}
+
+static void amba_kmi_remove(struct amba_device *dev)
+{
+	struct amba_kmi_port *kmi = amba_get_drvdata(dev);
+
+	serio_unregister_port(kmi->io);
+	clk_put(kmi->clk);
+	iounmap(kmi->base);
+	kfree(kmi);
+	amba_release_regions(dev);
+}
+
+static int amba_kmi_resume(struct device *dev)
+{
+	struct amba_kmi_port *kmi = dev_get_drvdata(dev);
+
+	/* kick the serio layer to rescan this port */
+	serio_reconnect(kmi->io);
+
+	return 0;
+}
+
+static DEFINE_SIMPLE_DEV_PM_OPS(amba_kmi_dev_pm_ops, NULL, amba_kmi_resume);
+
+static const struct amba_id amba_kmi_idtable[] = {
+	{
+		.id	= 0x00041050,
+		.mask	= 0x000fffff,
+	},
+	{ 0, 0 }
+};
+
+MODULE_DEVICE_TABLE(amba, amba_kmi_idtable);
+
+static struct amba_driver ambakmi_driver = {
+	.drv		= {
+		.name	= "kmi-pl050",
+		.pm	= pm_sleep_ptr(&amba_kmi_dev_pm_ops),
+	},
+	.id_table	= amba_kmi_idtable,
+	.probe		= amba_kmi_probe,
+	.remove		= amba_kmi_remove,
+};
+
+module_amba_driver(ambakmi_driver);
+
+MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
+MODULE_DESCRIPTION("AMBA KMI controller driver");
+MODULE_LICENSE("GPL");