linux-kernel - [PATCH 3/5] staging: ozwpan: Return correct actual

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Message-ID: <1343065787-7616-4-git-send-email-rgujare@ozmodevices.com>
Date:	Mon, 23 Jul 2012 18:49:45 +0100
From:	Rupesh Gujare <rgujare@...odevices.com>
To:	<devel@...verdev.osuosl.org>
CC:	<linux-kernel@...r.kernel.org>, <gregkh@...uxfoundation.org>
Subject: [PATCH 3/5] staging: ozwpan: Return correct actual_length to userland

This fixes issue where wrong retrun value was received
by userland application after writing data to raw hid device.

Signed-off-by: Rupesh Gujare <rgujare@...odevices.com>
---
 drivers/staging/ozwpan/ozhcd.c |   14 ++++++++------
 1 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/staging/ozwpan/ozhcd.c b/drivers/staging/ozwpan/ozhcd.c
index 4ac1f27..76821cb 100644
--- a/drivers/staging/ozwpan/ozhcd.c
+++ b/drivers/staging/ozwpan/ozhcd.c
@@ -933,13 +933,14 @@ void oz_hcd_control_cnf(void *hport, u8 req_id, u8 rcode, u8 *data,
 	} else {
 		int copy_len;
 		oz_trace("VENDOR-CLASS - cnf\n");
-		if (data_len <= urb->transfer_buffer_length)
-			copy_len = data_len;
-		else
-			copy_len = urb->transfer_buffer_length;
-		if (copy_len)
+		if (data_len) {
+			if (data_len <= urb->transfer_buffer_length)
+				copy_len = data_len;
+			else
+				copy_len = urb->transfer_buffer_length;
 			memcpy(urb->transfer_buffer, data, copy_len);
-		urb->actual_length = copy_len;
+			urb->actual_length = copy_len;
+		}
 		oz_complete_urb(hcd, urb, 0, 0);
 	}
 }
@@ -1517,6 +1518,7 @@ static void oz_process_ep0_urb(struct oz_hcd *ozhcd, struct urb *urb,
 		int data_len = 0;
 		if ((setup->bRequestType & USB_DIR_IN) == 0)
 			data_len = wlength;
+		urb->actual_length = data_len;
 		if (oz_usb_control_req(port->hpd, req_id, setup,
 				urb->transfer_buffer, data_len)) {
 			rc = -ENOMEM;
-- 
1.7.5.4


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