1 files changed, 31 insertions, 8 deletions

diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c
index ccc5e8238bd..786e1dbe88e 100644
--- a/drivers/usb/misc/usbtest.c
+++ b/drivers/usb/misc/usbtest.c
@@ -1,4 +1,3 @@
-#include <linux/config.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/init.h>
@@ -802,7 +801,9 @@ error:
 
 				if (u == urb || !u->dev)
 					continue;
+				spin_unlock(&ctx->lock);
 				status = usb_unlink_urb (u);
+				spin_lock(&ctx->lock);
 				switch (status) {
 				case -EINPROGRESS:
 				case -EBUSY:
@@ -1335,7 +1336,9 @@ struct iso_context {
 	unsigned		pending;
 	spinlock_t		lock;
 	struct completion	done;
+	int			submit_error;
 	unsigned long		errors;
+	unsigned long		packet_count;
 	struct usbtest_dev	*dev;
 };
 
@@ -1346,10 +1349,14 @@ static void iso_callback (struct urb *urb, struct pt_regs *regs)
 	spin_lock(&ctx->lock);
 	ctx->count--;
 
+	ctx->packet_count += urb->number_of_packets;
 	if (urb->error_count > 0)
 		ctx->errors += urb->error_count;
+	else if (urb->status != 0)
+		ctx->errors += urb->number_of_packets;
 
-	if (urb->status == 0 && ctx->count > (ctx->pending - 1)) {
+	if (urb->status == 0 && ctx->count > (ctx->pending - 1)
+			&& !ctx->submit_error) {
 		int status = usb_submit_urb (urb, GFP_ATOMIC);
 		switch (status) {
 		case 0:
@@ -1360,6 +1367,8 @@ static void iso_callback (struct urb *urb, struct pt_regs *regs)
 					status);
 			/* FALLTHROUGH */
 		case -ENODEV:			/* disconnected */
+		case -ESHUTDOWN:		/* endpoint disabled */
+			ctx->submit_error = 1;
 			break;
 		}
 	}
@@ -1369,8 +1378,8 @@ static void iso_callback (struct urb *urb, struct pt_regs *regs)
 	if (ctx->pending == 0) {
 		if (ctx->errors)
 			dev_dbg (&ctx->dev->intf->dev,
-				"iso test, %lu errors\n",
-				ctx->errors);
+				"iso test, %lu errors out of %lu\n",
+				ctx->errors, ctx->packet_count);
 		complete (&ctx->done);
 	}
 done:
@@ -1431,15 +1440,14 @@ test_iso_queue (struct usbtest_dev *dev, struct usbtest_param *param,
 	struct usb_device	*udev;
 	unsigned		i;
 	unsigned long		packets = 0;
-	int			status;
+	int			status = 0;
 	struct urb		*urbs[10];	/* FIXME no limit */
 
 	if (param->sglen > 10)
 		return -EDOM;
 
+	memset(&context, 0, sizeof context);
 	context.count = param->iterations * param->sglen;
-	context.pending = param->sglen;
-	context.errors = 0;
 	context.dev = dev;
 	init_completion (&context.done);
 	spin_lock_init (&context.lock);
@@ -1471,6 +1479,7 @@ test_iso_queue (struct usbtest_dev *dev, struct usbtest_param *param,
 
 	spin_lock_irq (&context.lock);
 	for (i = 0; i < param->sglen; i++) {
+		++context.pending;
 		status = usb_submit_urb (urbs [i], SLAB_ATOMIC);
 		if (status < 0) {
 			ERROR (dev, "submit iso[%d], error %d\n", i, status);
@@ -1481,12 +1490,26 @@ test_iso_queue (struct usbtest_dev *dev, struct usbtest_param *param,
 
 			simple_free_urb (urbs [i]);
 			context.pending--;
+			context.submit_error = 1;
+			break;
 		}
 	}
 	spin_unlock_irq (&context.lock);
 
 	wait_for_completion (&context.done);
-	return 0;
+
+	/*
+	 * Isochronous transfers are expected to fail sometimes.  As an
+	 * arbitrary limit, we will report an error if any submissions
+	 * fail or if the transfer failure rate is > 10%.
+	 */
+	if (status != 0)
+		;
+	else if (context.submit_error)
+		status = -EACCES;
+	else if (context.errors > context.packet_count / 10)
+		status = -EIO;
+	return status;
 
 fail:
 	for (i = 0; i < param->sglen; i++) {