Commit 150dbeaa authored by Johan Hovold's avatar Johan Hovold Committed by Greg Kroah-Hartman

USB: serial: ti_usb_3410_5052: fix control-message error handling

commit 39712e8b upstream.

Make sure to detect and return an error on zero-length control-message
transfers when reading from the device.

This addresses a potential failure to detect an empty transmit buffer
during close.

Also remove a redundant check for short transfer when sending a command.

Fixes: 1da177e4 ("Linux-2.6.12-rc2")
Reviewed-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b84e0c4c
......@@ -1343,13 +1343,10 @@ static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
(USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
value, moduleid, data, size, 1000);
if (status == size)
status = 0;
if (status > 0)
status = -ECOMM;
if (status < 0)
return status;
return status;
return 0;
}
......@@ -1365,8 +1362,7 @@ static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
if (status == size)
status = 0;
if (status > 0)
else if (status >= 0)
status = -ECOMM;
return status;
......
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