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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-09-14 17:37:51 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-09-16 11:02:47 +0200
commitec8eeceb06b7a6efb6d924fd2f4ba4ec79ddc7bf (patch)
tree8ff700b0a53fae70f66e782eebeb34b3e464abd3 /sound/usb
parentbe40c366416bf6ff74b25fd02e38cb6eaba497d1 (diff)
sound: usx2y: move to use usb_control_msg_send()
The usb_control_msg_send() call can handle data on the stack, as well as returning an error if a "short" write happens, so move the driver over to using that call instead. This ends up removing a helper function that is no longer needed. Cc: Jaroslav Kysela <perex@perex.cz> Reviewed-by: Takashi Iwai <tiwai@suse.de> Link: https://lore.kernel.org/r/20200914153756.3412156-7-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound/usb')
-rw-r--r--sound/usb/usx2y/us122l.c42
1 files changed, 8 insertions, 34 deletions
diff --git a/sound/usb/usx2y/us122l.c b/sound/usb/usx2y/us122l.c
index f86f7a61fb36..6d35303b0948 100644
--- a/sound/usb/usx2y/us122l.c
+++ b/sound/usb/usx2y/us122l.c
@@ -82,40 +82,13 @@ 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(dev, usb_sndctrlpipe(dev, 0),
- 'I',
- USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
- v, 0, NULL, 0, 1000);
+ ret = usb_control_msg_send(dev, 0, 'I',
+ USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+ v, 0, NULL, 0, 1000);
snd_printdd(KERN_DEBUG "%i\n", ret);
}
@@ -305,10 +278,11 @@ static int us122l_set_sample_rate(struct usb_device *dev, int rate)
data[0] = rate;
data[1] = rate >> 8;
data[2] = rate >> 16;
- 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)
+ 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)
snd_printk(KERN_ERR "%d: cannot set freq %d to ep 0x%x\n",
dev->devnum, rate, ep);
return err;