The latency timer was introduced with the FT232BM and FT245BM chips. Do
not bother attempting to read or write it for older chip versions.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Johan Hovold <johan@kernel.org>
int rv;
int l = priv->latency;
+ if (priv->chip_type == SIO || priv->chip_type == FT8U232AM)
+ return -EINVAL;
+
if (priv->flags & ASYNC_LOW_LATENCY)
l = 1;
unsigned char *buf;
int rv;
+ if (priv->chip_type == SIO || priv->chip_type == FT8U232AM)
+ return -EINVAL;
+
buf = kmalloc(1, GFP_KERNEL);
if (!buf)
return -ENOMEM;