diff options
| author | Johan Hovold <jhovold@gmail.com> | 2010-03-18 01:00:37 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-05-21 00:21:33 +0400 |
| commit | bbcb2b907415a90334521a31a8767cd77462c716 (patch) | |
| tree | 8ee895f4ee3352a7f57c52c5e99119bc6838edac /drivers/usb/serial/usb-serial.c | |
| parent | 317149c655defedfaf432143b86a720cfc12a424 (diff) | |
| download | linux-bbcb2b907415a90334521a31a8767cd77462c716.tar.xz | |
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>
Diffstat (limited to 'drivers/usb/serial/usb-serial.c')
| -rw-r--r-- | drivers/usb/serial/usb-serial.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index f3f65171de38..538924627eba 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -901,7 +901,9 @@ int usb_serial_probe(struct usb_interface *interface, dev_err(&interface->dev, "No free urbs available\n"); goto probe_error; } - buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); + buffer_size = serial->type->bulk_in_size; + if (!buffer_size) + buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); port->bulk_in_size = buffer_size; port->bulk_in_endpointAddress = endpoint->bEndpointAddress; port->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL); @@ -927,7 +929,9 @@ int usb_serial_probe(struct usb_interface *interface, } if (kfifo_alloc(&port->write_fifo, PAGE_SIZE, GFP_KERNEL)) goto probe_error; - buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); + buffer_size = serial->type->bulk_out_size; + if (!buffer_size) + buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); port->bulk_out_size = buffer_size; port->bulk_out_endpointAddress = endpoint->bEndpointAddress; port->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL); |