usb: usbtmc: uninitialized symbol 'actual' in usbtmc_ioctl_clear

[ Upstream commit 9a83190300867fb024d53f47c31088e34188efc1 ] 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 <[email protected]> Fixes: dfee02ac4bce ("usb: usbtmc: Fix ioctl USBTMC_IOCTL_CLEAR") Signed-off-by: Greg Kroah-Hartman <[email protected]> Signed-off-by: Sasha Levin <[email protected]>
akeromi · Nov 20, 2019 · 2e72489 · 2e72489
1 parent eb9b6c2
commit 2e72489
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/drivers/usb/class/usbtmc.c b/drivers/usb/class/usbtmc.c
@@ -1016,6 +1016,7 @@ static int usbtmc_ioctl_clear(struct usbtmc_device_data *data)
 		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),