Commit 146cc8a1 authored by Johan Hovold's avatar Johan Hovold

USB: serial: kl5kusb105: fix line-state error handling

The current implementation failed to detect short transfers when
attempting to read the line state, and also, to make things worse,
logged the content of the uninitialised heap transfer buffer.

Fixes: abf492e7 ("USB: kl5kusb105: fix DMA buffers on stack")
Fixes: 1da177e4 ("Linux-2.6.12-rc2")
Cc: stable <stable@vger.kernel.org>
Reviewed-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
parent 55fa15b5
......@@ -192,10 +192,11 @@ static int klsi_105_get_line_state(struct usb_serial_port *port,
status_buf, KLSI_STATUSBUF_LEN,
10000
);
if (rc < 0)
dev_err(&port->dev, "Reading line status failed (error = %d)\n",
rc);
else {
if (rc != KLSI_STATUSBUF_LEN) {
dev_err(&port->dev, "reading line status failed: %d\n", rc);
if (rc >= 0)
rc = -EIO;
} else {
status = get_unaligned_le16(status_buf);
dev_info(&port->serial->dev->dev, "read status %x %x\n",
......
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