diff options
| -rw-r--r-- | sound/usb/usx2y/us122l.c | 42 |
1 files changed, 34 insertions, 8 deletions
diff --git a/sound/usb/usx2y/us122l.c b/sound/usb/usx2y/us122l.c index 6d35303b0948..f86f7a61fb36 100644 --- a/sound/usb/usx2y/us122l.c +++ b/sound/usb/usx2y/us122l.c @@ -82,13 +82,40 @@ static int us144_create_usbmidi(struct snd_card *card) &US122L(card)->midi_list, &quirk); } +/* + * Wrapper for usb_control_msg(). + * Allocates a temp buffer to prevent dmaing from/to the stack. + */ +static int us122l_ctl_msg(struct usb_device *dev, unsigned int pipe, + __u8 request, __u8 requesttype, + __u16 value, __u16 index, void *data, + __u16 size, int timeout) +{ + int err; + void *buf = NULL; + + if (size > 0) { + buf = kmemdup(data, size, GFP_KERNEL); + if (!buf) + return -ENOMEM; + } + err = usb_control_msg(dev, pipe, request, requesttype, + value, index, buf, size, timeout); + if (size > 0) { + memcpy(data, buf, size); + kfree(buf); + } + return err; +} + static void pt_info_set(struct usb_device *dev, u8 v) { int ret; - ret = usb_control_msg_send(dev, 0, 'I', - USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, - v, 0, NULL, 0, 1000); + ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), + 'I', + USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + v, 0, NULL, 0, 1000); snd_printdd(KERN_DEBUG "%i\n", ret); } @@ -278,11 +305,10 @@ static int us122l_set_sample_rate(struct usb_device *dev, int rate) data[0] = rate; data[1] = rate >> 8; data[2] = rate >> 16; - err = usb_control_msg_send(dev, 0, UAC_SET_CUR, - USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT, - UAC_EP_CS_ATTR_SAMPLE_RATE << 8, ep, data, 3, - 1000); - if (err) + err = us122l_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR, + USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT, + UAC_EP_CS_ATTR_SAMPLE_RATE << 8, ep, data, 3, 1000); + if (err < 0) snd_printk(KERN_ERR "%d: cannot set freq %d to ep 0x%x\n", dev->devnum, rate, ep); return err; |