From 644d90850c65c6ac5698e4fadb01682196a25eea Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Fri, 23 Jan 2015 12:24:03 +0100 Subject: [PATCH] ALSA: line6: Minor refactoring Split some codes in the lengthy line6_probe(). Tested-by: Chris Rorvick Signed-off-by: Takashi Iwai --- sound/usb/line6/driver.c | 94 +++++++++++++++++++++++++----------------------- 1 file changed, 49 insertions(+), 45 deletions(-) diff --git a/sound/usb/line6/driver.c b/sound/usb/line6/driver.c index e7f9a99..b783c07 100644 --- a/sound/usb/line6/driver.c +++ b/sound/usb/line6/driver.c @@ -448,6 +448,52 @@ static void line6_destruct(struct snd_card *card) usb_put_dev(usbdev); } +/* get data from endpoint descriptor (see usb_maxpacket): */ +static void line6_get_interval(struct usb_line6 *line6) +{ + struct usb_device *usbdev = line6->usbdev; + struct usb_host_endpoint *ep; + unsigned pipe = usb_rcvintpipe(usbdev, line6->properties->ep_ctrl_r); + unsigned epnum = usb_pipeendpoint(pipe); + + ep = usbdev->ep_in[epnum]; + if (ep) { + line6->interval = ep->desc.bInterval; + line6->max_packet_size = le16_to_cpu(ep->desc.wMaxPacketSize); + } else { + dev_err(line6->ifcdev, + "endpoint not available, using fallback values"); + line6->interval = LINE6_FALLBACK_INTERVAL; + line6->max_packet_size = LINE6_FALLBACK_MAXPACKETSIZE; + } +} + +static int line6_init_cap_control(struct usb_line6 *line6) +{ + int ret; + + /* initialize USB buffers: */ + line6->buffer_listen = kmalloc(LINE6_BUFSIZE_LISTEN, GFP_KERNEL); + if (!line6->buffer_listen) + return -ENOMEM; + + line6->buffer_message = kmalloc(LINE6_MESSAGE_MAXLEN, GFP_KERNEL); + if (!line6->buffer_message) + return -ENOMEM; + + line6->urb_listen = usb_alloc_urb(0, GFP_KERNEL); + if (!line6->urb_listen) + return -ENOMEM; + + ret = line6_start_listen(line6); + if (ret < 0) { + dev_err(line6->ifcdev, "cannot start listening: %d\n", ret); + return ret; + } + + return 0; +} + /* Probe USB device. */ @@ -485,24 +531,7 @@ int line6_probe(struct usb_interface *interface, line6->usbdev = usbdev; line6->ifcdev = &interface->dev; - /* get data from endpoint descriptor (see usb_maxpacket): */ - { - struct usb_host_endpoint *ep; - unsigned pipe = usb_rcvintpipe(usbdev, properties->ep_ctrl_r); - unsigned epnum = usb_pipeendpoint(pipe); - ep = usbdev->ep_in[epnum]; - - if (ep != NULL) { - line6->interval = ep->desc.bInterval; - line6->max_packet_size = - le16_to_cpu(ep->desc.wMaxPacketSize); - } else { - line6->interval = LINE6_FALLBACK_INTERVAL; - line6->max_packet_size = LINE6_FALLBACK_MAXPACKETSIZE; - dev_err(line6->ifcdev, - "endpoint not available, using fallback values"); - } - } + line6_get_interval(line6); ret = snd_card_new(line6->ifcdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, @@ -525,34 +554,9 @@ int line6_probe(struct usb_interface *interface, usb_get_dev(usbdev); if (properties->capabilities & LINE6_CAP_CONTROL) { - /* initialize USB buffers: */ - line6->buffer_listen = - kmalloc(LINE6_BUFSIZE_LISTEN, GFP_KERNEL); - if (line6->buffer_listen == NULL) { - ret = -ENOMEM; - goto err_destruct; - } - - line6->buffer_message = - kmalloc(LINE6_MESSAGE_MAXLEN, GFP_KERNEL); - if (line6->buffer_message == NULL) { - ret = -ENOMEM; + ret = line6_init_cap_control(line6); + if (ret < 0) goto err_destruct; - } - - line6->urb_listen = usb_alloc_urb(0, GFP_KERNEL); - - if (line6->urb_listen == NULL) { - ret = -ENOMEM; - goto err_destruct; - } - - ret = line6_start_listen(line6); - if (ret < 0) { - dev_err(&interface->dev, "%s: usb_submit_urb failed\n", - __func__); - goto err_destruct; - } } /* initialize device data based on device: */ -- 2.7.4