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, 204 insertions, 0 deletions

diff --git a/drivers/input/tablet/kbtab.c b/drivers/input/tablet/kbtab.c
new file mode 100644
index 000000000..6ce70c8e2
--- /dev/null
+++ b/drivers/input/tablet/kbtab.c
@@ -0,0 +1,204 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/usb/input.h>
+#include <linux/unaligned.h>
+
+/*
+ * Pressure-threshold modules param code from Alex Perry <alex.perry@ieee.org>
+ */
+
+MODULE_AUTHOR("Josh Myer <josh@joshisanerd.com>");
+MODULE_DESCRIPTION("USB KB Gear JamStudio Tablet driver");
+MODULE_LICENSE("GPL");
+
+#define USB_VENDOR_ID_KBGEAR	0x084e
+
+static int kb_pressure_click = 0x10;
+module_param(kb_pressure_click, int, 0);
+MODULE_PARM_DESC(kb_pressure_click, "pressure threshold for clicks");
+
+struct kbtab {
+	unsigned char *data;
+	dma_addr_t data_dma;
+	struct input_dev *dev;
+	struct usb_interface *intf;
+	struct urb *irq;
+	char phys[32];
+};
+
+static void kbtab_irq(struct urb *urb)
+{
+	struct kbtab *kbtab = urb->context;
+	unsigned char *data = kbtab->data;
+	struct input_dev *dev = kbtab->dev;
+	int pressure;
+	int retval;
+
+	switch (urb->status) {
+	case 0:
+		/* success */
+		break;
+	case -ECONNRESET:
+	case -ENOENT:
+	case -ESHUTDOWN:
+		/* this urb is terminated, clean up */
+		dev_dbg(&kbtab->intf->dev,
+			"%s - urb shutting down with status: %d\n",
+			__func__, urb->status);
+		return;
+	default:
+		dev_dbg(&kbtab->intf->dev,
+			"%s - nonzero urb status received: %d\n",
+			__func__, urb->status);
+		goto exit;
+	}
+
+
+	input_report_key(dev, BTN_TOOL_PEN, 1);
+
+	input_report_abs(dev, ABS_X, get_unaligned_le16(&data[1]));
+	input_report_abs(dev, ABS_Y, get_unaligned_le16(&data[3]));
+
+	/*input_report_key(dev, BTN_TOUCH , data[0] & 0x01);*/
+	input_report_key(dev, BTN_RIGHT, data[0] & 0x02);
+
+	pressure = data[5];
+	if (kb_pressure_click == -1)
+		input_report_abs(dev, ABS_PRESSURE, pressure);
+	else
+		input_report_key(dev, BTN_LEFT, pressure > kb_pressure_click ? 1 : 0);
+
+	input_sync(dev);
+
+ exit:
+	retval = usb_submit_urb(urb, GFP_ATOMIC);
+	if (retval)
+		dev_err(&kbtab->intf->dev,
+			"%s - usb_submit_urb failed with result %d\n",
+			__func__, retval);
+}
+
+static const struct usb_device_id kbtab_ids[] = {
+	{ USB_DEVICE(USB_VENDOR_ID_KBGEAR, 0x1001), .driver_info = 0 },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(usb, kbtab_ids);
+
+static int kbtab_open(struct input_dev *dev)
+{
+	struct kbtab *kbtab = input_get_drvdata(dev);
+	struct usb_device *udev = interface_to_usbdev(kbtab->intf);
+
+	kbtab->irq->dev = udev;
+	if (usb_submit_urb(kbtab->irq, GFP_KERNEL))
+		return -EIO;
+
+	return 0;
+}
+
+static void kbtab_close(struct input_dev *dev)
+{
+	struct kbtab *kbtab = input_get_drvdata(dev);
+
+	usb_kill_urb(kbtab->irq);
+}
+
+static int kbtab_probe(struct usb_interface *intf, const struct usb_device_id *id)
+{
+	struct usb_device *dev = interface_to_usbdev(intf);
+	struct usb_endpoint_descriptor *endpoint;
+	struct kbtab *kbtab;
+	struct input_dev *input_dev;
+	int error = -ENOMEM;
+
+	if (intf->cur_altsetting->desc.bNumEndpoints < 1)
+		return -ENODEV;
+
+	endpoint = &intf->cur_altsetting->endpoint[0].desc;
+	if (!usb_endpoint_is_int_in(endpoint))
+		return -ENODEV;
+
+	kbtab = kzalloc_obj(*kbtab);
+	input_dev = input_allocate_device();
+	if (!kbtab || !input_dev)
+		goto fail1;
+
+	kbtab->data = usb_alloc_coherent(dev, 8, GFP_KERNEL, &kbtab->data_dma);
+	if (!kbtab->data)
+		goto fail1;
+
+	kbtab->irq = usb_alloc_urb(0, GFP_KERNEL);
+	if (!kbtab->irq)
+		goto fail2;
+
+	kbtab->intf = intf;
+	kbtab->dev = input_dev;
+
+	usb_make_path(dev, kbtab->phys, sizeof(kbtab->phys));
+	strlcat(kbtab->phys, "/input0", sizeof(kbtab->phys));
+
+	input_dev->name = "KB Gear Tablet";
+	input_dev->phys = kbtab->phys;
+	usb_to_input_id(dev, &input_dev->id);
+	input_dev->dev.parent = &intf->dev;
+
+	input_set_drvdata(input_dev, kbtab);
+
+	input_dev->open = kbtab_open;
+	input_dev->close = kbtab_close;
+
+	input_dev->evbit[0] |= BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
+	input_dev->keybit[BIT_WORD(BTN_LEFT)] |=
+		BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
+	input_dev->keybit[BIT_WORD(BTN_DIGI)] |=
+		BIT_MASK(BTN_TOOL_PEN) | BIT_MASK(BTN_TOUCH);
+	input_set_abs_params(input_dev, ABS_X, 0, 0x2000, 4, 0);
+	input_set_abs_params(input_dev, ABS_Y, 0, 0x1750, 4, 0);
+	input_set_abs_params(input_dev, ABS_PRESSURE, 0, 0xff, 0, 0);
+
+	usb_fill_int_urb(kbtab->irq, dev,
+			 usb_rcvintpipe(dev, endpoint->bEndpointAddress),
+			 kbtab->data, 8,
+			 kbtab_irq, kbtab, endpoint->bInterval);
+	kbtab->irq->transfer_dma = kbtab->data_dma;
+	kbtab->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+	error = input_register_device(kbtab->dev);
+	if (error)
+		goto fail3;
+
+	usb_set_intfdata(intf, kbtab);
+
+	return 0;
+
+ fail3:	usb_free_urb(kbtab->irq);
+ fail2:	usb_free_coherent(dev, 8, kbtab->data, kbtab->data_dma);
+ fail1:	input_free_device(input_dev);
+	kfree(kbtab);
+	return error;
+}
+
+static void kbtab_disconnect(struct usb_interface *intf)
+{
+	struct kbtab *kbtab = usb_get_intfdata(intf);
+	struct usb_device *udev = interface_to_usbdev(intf);
+
+	usb_set_intfdata(intf, NULL);
+
+	input_unregister_device(kbtab->dev);
+	usb_free_urb(kbtab->irq);
+	usb_free_coherent(udev, 8, kbtab->data, kbtab->data_dma);
+	kfree(kbtab);
+}
+
+static struct usb_driver kbtab_driver = {
+	.name =		"kbtab",
+	.probe =	kbtab_probe,
+	.disconnect =	kbtab_disconnect,
+	.id_table =	kbtab_ids,
+};
+
+module_usb_driver(kbtab_driver);