USB: serial: allow drivers to define bulk buffer sizes
Allow drivers to define custom bulk in/out buffer sizes in struct
usb_serial_driver. If not set, fall back to the default buffer size
which matches the endpoint size.
Three drivers are currently freeing the pre-allocated buffers and
allocating larger ones to achieve this at port probe (ftdi_sio) or even
at port open (ipaq and iuu_phoenix), which needless to say is suboptimal.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/serial/iuu_phoenix.c b/drivers/usb/serial/iuu_phoenix.c
index 43f13cf..74551cb 100644
--- a/drivers/usb/serial/iuu_phoenix.c
+++ b/drivers/usb/serial/iuu_phoenix.c
@@ -1044,34 +1044,6 @@
if (buf == NULL)
return -ENOMEM;
- /* fixup the endpoint buffer size */
- kfree(port->bulk_out_buffer);
- port->bulk_out_buffer = kmalloc(512, GFP_KERNEL);
- port->bulk_out_size = 512;
- kfree(port->bulk_in_buffer);
- port->bulk_in_buffer = kmalloc(512, GFP_KERNEL);
- port->bulk_in_size = 512;
-
- if (!port->bulk_out_buffer || !port->bulk_in_buffer) {
- kfree(port->bulk_out_buffer);
- kfree(port->bulk_in_buffer);
- kfree(buf);
- return -ENOMEM;
- }
-
- usb_fill_bulk_urb(port->write_urb, port->serial->dev,
- usb_sndbulkpipe(port->serial->dev,
- port->bulk_out_endpointAddress),
- port->bulk_out_buffer, 512,
- NULL, NULL);
-
-
- usb_fill_bulk_urb(port->read_urb, port->serial->dev,
- usb_rcvbulkpipe(port->serial->dev,
- port->bulk_in_endpointAddress),
- port->bulk_in_buffer, 512,
- NULL, NULL);
-
priv->poll = 0;
/* initialize writebuf */
@@ -1277,6 +1249,8 @@
},
.id_table = id_table,
.num_ports = 1,
+ .bulk_in_size = 512,
+ .bulk_out_size = 512,
.port_probe = iuu_create_sysfs_attrs,
.port_remove = iuu_remove_sysfs_attrs,
.open = iuu_open,