usb: usbtmc: uninitialized symbol 'actual' in usbtmc_read

Fix uninitialized symbol 'actual' in function usbtmc_read.

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: d7604ff0dc01 ("usb: usbtmc: Optimize usbtmc_read")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/class/usbtmc.c b/drivers/usb/class/usbtmc.c
index dfbcf418dad75ed975fec66855cf7fb6f70b925e..9cb90603f71f81ab6b2f30e96ed06cb4cc8c1518 100644 (file)
--- a/drivers/usb/class/usbtmc.c
+++ b/drivers/usb/class/usbtmc.c
@@ -1370,6 +1370,7 @@ static ssize_t usbtmc_read(struct file *filp, char __user *buf,
 
        /* Loop until we have fetched everything we requested */
        remaining = count;
+       actual = 0;
 
        /* Send bulk URB */
        retval = usb_bulk_msg(data->usb_dev,