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, 153 insertions, 0 deletions

diff --git a/drivers/net/usb/plusb.c b/drivers/net/usb/plusb.c
new file mode 100644
index 000000000..289411485
--- /dev/null
+++ b/drivers/net/usb/plusb.c
@@ -0,0 +1,153 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * PL-2301/2302 USB host-to-host link cables
+ * Copyright (C) 2000-2005 by David Brownell
+ */
+
+// #define	DEBUG			// error path messages, extra info
+// #define	VERBOSE			// more; success messages
+
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/workqueue.h>
+#include <linux/mii.h>
+#include <linux/usb.h>
+#include <linux/usb/usbnet.h>
+
+
+/*
+ * Prolific PL-2301/PL-2302 driver ... http://www.prolific.com.tw/
+ *
+ * The protocol and handshaking used here should be bug-compatible
+ * with the Linux 2.2 "plusb" driver, by Deti Fliegl.
+ *
+ * HEADS UP:  this handshaking isn't all that robust.  This driver
+ * gets confused easily if you unplug one end of the cable then
+ * try to connect it again; you'll need to restart both ends. The
+ * "naplink" software (used by some PlayStation/2 developers) does
+ * the handshaking much better!   Also, sometimes this hardware
+ * seems to get wedged under load.  Prolific docs are weak, and
+ * don't identify differences between PL2301 and PL2302, much less
+ * anything to explain the different PL2302 versions observed.
+ *
+ * NOTE:  pl2501 has several modes, including pl2301 and pl2302
+ * compatibility.   Some docs suggest the difference between 2301
+ * and 2302 is only to make MS-Windows use a different driver...
+ *
+ * pl25a1 glue based on patch from Tony Gibbs.  Prolific "docs" on
+ * this chip are as usual incomplete about what control messages
+ * are supported.
+ */
+
+/*
+ * Bits 0-4 can be used for software handshaking; they're set from
+ * one end, cleared from the other, "read" with the interrupt byte.
+ */
+#define	PL_S_EN		(1<<7)		/* (feature only) suspend enable */
+/* reserved bit -- rx ready (6) ? */
+#define	PL_TX_READY	(1<<5)		/* (interrupt only) transmit ready */
+#define	PL_RESET_OUT	(1<<4)		/* reset output pipe */
+#define	PL_RESET_IN	(1<<3)		/* reset input pipe */
+#define	PL_TX_C		(1<<2)		/* transmission complete */
+#define	PL_TX_REQ	(1<<1)		/* transmission received */
+#define	PL_PEER_E	(1<<0)		/* peer exists */
+
+static inline int
+pl_vendor_req(struct usbnet *dev, u8 req, u8 val, u8 index)
+{
+	return usbnet_write_cmd(dev, req, USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+				val, index, NULL, 0);
+}
+
+static inline int
+pl_set_QuickLink_features(struct usbnet *dev, int val)
+{
+	return pl_vendor_req(dev, 3, (u8) val, 0);
+}
+
+static int pl_reset(struct usbnet *dev)
+{
+	int status;
+
+	/* some units seem to need this reset, others reject it utterly.
+	 * FIXME be more like "naplink" or windows drivers.
+	 */
+	status = pl_set_QuickLink_features(dev,
+		PL_S_EN|PL_RESET_OUT|PL_RESET_IN|PL_PEER_E);
+	if (status != 0 && netif_msg_probe(dev))
+		netif_dbg(dev, link, dev->net, "pl_reset --> %d\n", status);
+	return 0;
+}
+
+static const struct driver_info	prolific_info = {
+	.description =	"Prolific PL-2301/PL-2302/PL-25A1/PL-27A1",
+	.flags =	FLAG_POINTTOPOINT | FLAG_NO_SETINT,
+		/* some PL-2302 versions seem to fail usb_set_interface() */
+	.reset =	pl_reset,
+};
+
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * Proilific's name won't normally be on the cables, and
+ * may not be on the device.
+ */
+
+static const struct usb_device_id	products [] = {
+
+/* full speed cables */
+{
+	USB_DEVICE(0x067b, 0x0000),	// PL-2301
+	.driver_info =	(unsigned long) &prolific_info,
+}, {
+	USB_DEVICE(0x067b, 0x0001),	// PL-2302
+	.driver_info =	(unsigned long) &prolific_info,
+},
+
+/* high speed cables */
+{
+	USB_DEVICE(0x067b, 0x25a1),     /* PL-25A1, no eeprom */
+	.driver_info =  (unsigned long) &prolific_info,
+}, {
+	USB_DEVICE(0x050d, 0x258a),     /* Belkin F5U258/F5U279 (PL-25A1) */
+	.driver_info =  (unsigned long) &prolific_info,
+}, {
+	USB_DEVICE(0x3923, 0x7825),     /* National Instruments USB
+					 * Host-to-Host Cable
+					 */
+	.driver_info =  (unsigned long) &prolific_info,
+
+},
+
+/* super speed cables */
+{
+	USB_DEVICE(0x067b, 0x27a1),     /* PL-27A1, no eeprom
+					 * also: goobay Active USB 3.0
+					 * Data Link,
+					 * Unitek Y-3501
+					 */
+	.driver_info =  (unsigned long) &prolific_info,
+},
+
+	{ },		// END
+};
+MODULE_DEVICE_TABLE(usb, products);
+
+static struct usb_driver plusb_driver = {
+	.name =		"plusb",
+	.id_table =	products,
+	.probe =	usbnet_probe,
+	.disconnect =	usbnet_disconnect,
+	.suspend =	usbnet_suspend,
+	.resume =	usbnet_resume,
+	.disable_hub_initiated_lpm = 1,
+};
+
+module_usb_driver(plusb_driver);
+
+MODULE_AUTHOR("David Brownell");
+MODULE_DESCRIPTION("Prolific PL-2301/2302/25A1/27A1 USB Host to Host Link Driver");
+MODULE_LICENSE("GPL");