From: Guido Kiener <guido.kiener@rohde-schwarz.com>
Date: Mon, 24 Sep 2018 23:30:31 +0000 (+0200)
Subject: usb: usbtmc: uninitialized symbol 'actual' in usbtmc_ioctl_clear
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=9a83190300867fb024d53f47c31088e34188efc1;p=linux.git

usb: usbtmc: uninitialized symbol 'actual' in usbtmc_ioctl_clear

Fix uninitialized symbol 'actual' in function usbtmc_ioctl_clear.

When symbol 'actual' is not initialized and usb_bulk_msg() fails,
the subsequent kernel debug message shows a random value.

Signed-off-by: Guido Kiener <guido.kiener@rohde-schwarz.com>
Fixes: dfee02ac4bce ("usb: usbtmc: Fix ioctl USBTMC_IOCTL_CLEAR")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/usb/class/usbtmc.c b/drivers/usb/class/usbtmc.c
index 9cb90603f71f8..7184fa035434f 100644
--- a/drivers/usb/class/usbtmc.c
+++ b/drivers/usb/class/usbtmc.c
@@ -1679,6 +1679,7 @@ usbtmc_clear_check_status:
 		do {
 			dev_dbg(dev, "Reading from bulk in EP\n");
 
+			actual = 0;
 			rv = usb_bulk_msg(data->usb_dev,
 					  usb_rcvbulkpipe(data->usb_dev,
 							  data->bulk_in),