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, 406 insertions, 0 deletions

diff --git a/drivers/usb/misc/idmouse.c b/drivers/usb/misc/idmouse.c
new file mode 100644
index 000000000..3e37adf2b
--- /dev/null
+++ b/drivers/usb/misc/idmouse.c
@@ -0,0 +1,406 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* Siemens ID Mouse driver v0.6
+
+  Copyright (C) 2004-5 by Florian 'Floe' Echtler  <echtler@fs.tum.de>
+                      and Andreas  'ad'  Deresch <aderesch@fs.tum.de>
+
+  Derived from the USB Skeleton driver 1.1,
+  Copyright (C) 2003 Greg Kroah-Hartman (greg@kroah.com)
+
+  Additional information provided by Martin Reising
+  <Martin.Reising@natural-computing.de>
+
+*/
+
+#include <linux/kernel.h>
+#include <linux/sched/signal.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/completion.h>
+#include <linux/mutex.h>
+#include <linux/uaccess.h>
+#include <linux/usb.h>
+
+/* image constants */
+#define WIDTH 225
+#define HEIGHT 289
+#define HEADER "P5 225 289 255 "
+#define IMGSIZE ((WIDTH * HEIGHT) + sizeof(HEADER)-1)
+
+#define DRIVER_SHORT   "idmouse"
+#define DRIVER_AUTHOR  "Florian 'Floe' Echtler <echtler@fs.tum.de>"
+#define DRIVER_DESC    "Siemens ID Mouse FingerTIP Sensor Driver"
+
+/* minor number for misc USB devices */
+#define USB_IDMOUSE_MINOR_BASE 132
+
+/* vendor and device IDs */
+#define ID_SIEMENS 0x0681
+#define ID_IDMOUSE 0x0005
+#define ID_CHERRY  0x0010
+
+/* device ID table */
+static const struct usb_device_id idmouse_table[] = {
+	{USB_DEVICE(ID_SIEMENS, ID_IDMOUSE)}, /* Siemens ID Mouse (Professional) */
+	{USB_DEVICE(ID_SIEMENS, ID_CHERRY )}, /* Cherry FingerTIP ID Board       */
+	{}                                    /* terminating null entry          */
+};
+
+/* sensor commands */
+#define FTIP_RESET   0x20
+#define FTIP_ACQUIRE 0x21
+#define FTIP_RELEASE 0x22
+#define FTIP_BLINK   0x23  /* LSB of value = blink pulse width */
+#define FTIP_SCROLL  0x24
+
+#define ftip_command(dev, command, value, index) \
+	usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), command, \
+	USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT, value, index, NULL, 0, 1000)
+
+MODULE_DEVICE_TABLE(usb, idmouse_table);
+
+/* structure to hold all of our device specific stuff */
+struct usb_idmouse {
+	struct kref kref;
+
+	struct usb_device *udev; /* save off the usb device pointer */
+	struct usb_interface *interface; /* the interface for this device */
+
+	unsigned char *bulk_in_buffer; /* the buffer to receive data */
+	size_t bulk_in_size; /* the maximum bulk packet size */
+	size_t orig_bi_size; /* same as above, but reported by the device */
+	__u8 bulk_in_endpointAddr; /* the address of the bulk in endpoint */
+
+	int open; /* if the port is open or not */
+	int present; /* if the device is not disconnected */
+	struct mutex lock; /* locks this structure */
+
+};
+
+/* local function prototypes */
+static ssize_t idmouse_read(struct file *file, char __user *buffer,
+				size_t count, loff_t * ppos);
+
+static int idmouse_open(struct inode *inode, struct file *file);
+static int idmouse_release(struct inode *inode, struct file *file);
+
+static int idmouse_probe(struct usb_interface *interface,
+				const struct usb_device_id *id);
+
+static void idmouse_disconnect(struct usb_interface *interface);
+static int idmouse_suspend(struct usb_interface *intf, pm_message_t message);
+static int idmouse_resume(struct usb_interface *intf);
+
+/* file operation pointers */
+static const struct file_operations idmouse_fops = {
+	.owner = THIS_MODULE,
+	.read = idmouse_read,
+	.open = idmouse_open,
+	.release = idmouse_release,
+	.llseek = default_llseek,
+};
+
+/* class driver information */
+static struct usb_class_driver idmouse_class = {
+	.name = "idmouse%d",
+	.fops = &idmouse_fops,
+	.minor_base = USB_IDMOUSE_MINOR_BASE,
+};
+
+/* usb specific object needed to register this driver with the usb subsystem */
+static struct usb_driver idmouse_driver = {
+	.name = DRIVER_SHORT,
+	.probe = idmouse_probe,
+	.disconnect = idmouse_disconnect,
+	.suspend = idmouse_suspend,
+	.resume = idmouse_resume,
+	.reset_resume = idmouse_resume,
+	.id_table = idmouse_table,
+	.supports_autosuspend = 1,
+};
+
+static int idmouse_create_image(struct usb_idmouse *dev)
+{
+	int bytes_read;
+	int bulk_read;
+	int result;
+
+	memcpy(dev->bulk_in_buffer, HEADER, sizeof(HEADER)-1);
+	bytes_read = sizeof(HEADER)-1;
+
+	/* reset the device and set a fast blink rate */
+	result = ftip_command(dev, FTIP_RELEASE, 0, 0);
+	if (result < 0)
+		goto reset;
+	result = ftip_command(dev, FTIP_BLINK,   1, 0);
+	if (result < 0)
+		goto reset;
+
+	/* initialize the sensor - sending this command twice */
+	/* significantly reduces the rate of failed reads     */
+	result = ftip_command(dev, FTIP_ACQUIRE, 0, 0);
+	if (result < 0)
+		goto reset;
+	result = ftip_command(dev, FTIP_ACQUIRE, 0, 0);
+	if (result < 0)
+		goto reset;
+
+	/* start the readout - sending this command twice */
+	/* presumably enables the high dynamic range mode */
+	result = ftip_command(dev, FTIP_RESET,   0, 0);
+	if (result < 0)
+		goto reset;
+	result = ftip_command(dev, FTIP_RESET,   0, 0);
+	if (result < 0)
+		goto reset;
+
+	/* loop over a blocking bulk read to get data from the device */
+	while (bytes_read < IMGSIZE) {
+		result = usb_bulk_msg(dev->udev,
+				usb_rcvbulkpipe(dev->udev, dev->bulk_in_endpointAddr),
+				dev->bulk_in_buffer + bytes_read,
+				dev->bulk_in_size, &bulk_read, 5000);
+		if (result < 0) {
+			/* Maybe this error was caused by the increased packet size? */
+			/* Reset to the original value and tell userspace to retry.  */
+			if (dev->bulk_in_size != dev->orig_bi_size) {
+				dev->bulk_in_size = dev->orig_bi_size;
+				result = -EAGAIN;
+			}
+			break;
+		}
+		if (signal_pending(current)) {
+			result = -EINTR;
+			break;
+		}
+		bytes_read += bulk_read;
+	}
+
+	/* check for valid image */
+	/* right border should be black (0x00) */
+	for (bytes_read = sizeof(HEADER)-1 + WIDTH-1; bytes_read < IMGSIZE; bytes_read += WIDTH)
+		if (dev->bulk_in_buffer[bytes_read] != 0x00)
+			return -EAGAIN;
+
+	/* lower border should be white (0xFF) */
+	for (bytes_read = IMGSIZE-WIDTH; bytes_read < IMGSIZE-1; bytes_read++)
+		if (dev->bulk_in_buffer[bytes_read] != 0xFF)
+			return -EAGAIN;
+
+	/* reset the device */
+reset:
+	ftip_command(dev, FTIP_RELEASE, 0, 0);
+
+	/* should be IMGSIZE == 65040 */
+	dev_dbg(&dev->interface->dev, "read %d bytes fingerprint data\n",
+		bytes_read);
+	return result;
+}
+
+/* PM operations are nops as this driver does IO only during open() */
+static int idmouse_suspend(struct usb_interface *intf, pm_message_t message)
+{
+	return 0;
+}
+
+static int idmouse_resume(struct usb_interface *intf)
+{
+	return 0;
+}
+
+static inline void idmouse_delete(struct kref *kref)
+{
+	struct usb_idmouse *dev = container_of(kref, struct usb_idmouse, kref);
+
+	kfree(dev->bulk_in_buffer);
+	kfree(dev);
+}
+
+static int idmouse_open(struct inode *inode, struct file *file)
+{
+	struct usb_idmouse *dev;
+	struct usb_interface *interface;
+	int result;
+
+	/* get the interface from minor number and driver information */
+	interface = usb_find_interface(&idmouse_driver, iminor(inode));
+	if (!interface)
+		return -ENODEV;
+
+	/* get the device information block from the interface */
+	dev = usb_get_intfdata(interface);
+	if (!dev)
+		return -ENODEV;
+
+	/* lock this device */
+	mutex_lock(&dev->lock);
+
+	/* check if already open */
+	if (dev->open) {
+
+		/* already open, so fail */
+		result = -EBUSY;
+
+	} else {
+
+		/* create a new image and check for success */
+		result = usb_autopm_get_interface(interface);
+		if (result)
+			goto error;
+		result = idmouse_create_image(dev);
+		usb_autopm_put_interface(interface);
+		if (result)
+			goto error;
+
+		/* increment our usage count for the driver */
+		++dev->open;
+
+		kref_get(&dev->kref);
+
+		/* save our object in the file's private structure */
+		file->private_data = dev;
+
+	} 
+
+error:
+
+	/* unlock this device */
+	mutex_unlock(&dev->lock);
+	return result;
+}
+
+static int idmouse_release(struct inode *inode, struct file *file)
+{
+	struct usb_idmouse *dev;
+
+	dev = file->private_data;
+
+	if (dev == NULL)
+		return -ENODEV;
+
+	/* lock our device */
+	mutex_lock(&dev->lock);
+	--dev->open;
+	mutex_unlock(&dev->lock);
+
+	kref_put(&dev->kref, idmouse_delete);
+
+	return 0;
+}
+
+static ssize_t idmouse_read(struct file *file, char __user *buffer, size_t count,
+				loff_t * ppos)
+{
+	struct usb_idmouse *dev = file->private_data;
+	int result;
+
+	/* lock this object */
+	mutex_lock(&dev->lock);
+
+	/* verify that the device wasn't unplugged */
+	if (!dev->present) {
+		mutex_unlock(&dev->lock);
+		return -ENODEV;
+	}
+
+	result = simple_read_from_buffer(buffer, count, ppos,
+					dev->bulk_in_buffer, IMGSIZE);
+	/* unlock the device */
+	mutex_unlock(&dev->lock);
+	return result;
+}
+
+static int idmouse_probe(struct usb_interface *interface,
+				const struct usb_device_id *id)
+{
+	struct usb_device *udev = interface_to_usbdev(interface);
+	struct usb_idmouse *dev;
+	struct usb_host_interface *iface_desc;
+	struct usb_endpoint_descriptor *endpoint;
+	int result;
+
+	/* check if we have gotten the data or the hid interface */
+	iface_desc = interface->cur_altsetting;
+	if (iface_desc->desc.bInterfaceClass != 0x0A)
+		return -ENODEV;
+
+	if (iface_desc->desc.bNumEndpoints < 1)
+		return -ENODEV;
+
+	/* allocate memory for our device state and initialize it */
+	dev = kzalloc_obj(*dev);
+	if (dev == NULL)
+		return -ENOMEM;
+
+	kref_init(&dev->kref);
+	mutex_init(&dev->lock);
+	dev->udev = udev;
+	dev->interface = interface;
+
+	/* set up the endpoint information - use only the first bulk-in endpoint */
+	result = usb_find_bulk_in_endpoint(iface_desc, &endpoint);
+	if (result) {
+		dev_err(&interface->dev, "Unable to find bulk-in endpoint.\n");
+		goto err_put_kref;
+	}
+
+	dev->orig_bi_size = usb_endpoint_maxp(endpoint);
+	dev->bulk_in_size = 0x200; /* works _much_ faster */
+	dev->bulk_in_endpointAddr = endpoint->bEndpointAddress;
+	dev->bulk_in_buffer = kmalloc(IMGSIZE + dev->bulk_in_size, GFP_KERNEL);
+	if (!dev->bulk_in_buffer) {
+		result = -ENOMEM;
+		goto err_put_kref;
+	}
+
+	/* allow device read, write and ioctl */
+	dev->present = 1;
+
+	/* we can register the device now, as it is ready */
+	usb_set_intfdata(interface, dev);
+	result = usb_register_dev(interface, &idmouse_class);
+	if (result) {
+		/* something prevented us from registering this device */
+		dev_err(&interface->dev, "Unable to allocate minor number.\n");
+		goto err_put_kref;
+	}
+
+	/* be noisy */
+	dev_info(&interface->dev,"%s now attached\n",DRIVER_DESC);
+
+	return 0;
+
+err_put_kref:
+	kref_put(&dev->kref, idmouse_delete);
+
+	return result;
+}
+
+static void idmouse_disconnect(struct usb_interface *interface)
+{
+	struct usb_idmouse *dev = usb_get_intfdata(interface);
+
+	/* give back our minor */
+	usb_deregister_dev(interface, &idmouse_class);
+
+	/* lock the device */
+	mutex_lock(&dev->lock);
+
+	/* prevent device read, write and ioctl */
+	dev->present = 0;
+
+	mutex_unlock(&dev->lock);
+
+	kref_put(&dev->kref, idmouse_delete);
+
+	dev_info(&interface->dev, "disconnected\n");
+}
+
+module_usb_driver(idmouse_driver);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+