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path: root/sound/usb/usx2y/us122l.c
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Diffstat (limited to 'sound/usb/usx2y/us122l.c')
-rw-r--r--sound/usb/usx2y/us122l.c22
1 files changed, 13 insertions, 9 deletions
diff --git a/sound/usb/usx2y/us122l.c b/sound/usb/usx2y/us122l.c
index 98276aafefe6..a5aae9d67f31 100644
--- a/sound/usb/usx2y/us122l.c
+++ b/sound/usb/usx2y/us122l.c
@@ -349,14 +349,10 @@ static int usb_stream_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
if (cmd != SNDRV_USB_STREAM_IOCTL_SET_PARAMS)
return -ENOTTY;
- cfg = kmalloc(sizeof(*cfg), GFP_KERNEL);
- if (!cfg)
- return -ENOMEM;
+ cfg = memdup_user((void *)arg, sizeof(*cfg));
+ if (IS_ERR(cfg))
+ return PTR_ERR(cfg);
- if (copy_from_user(cfg, (void *)arg, sizeof(*cfg))) {
- err = -EFAULT;
- goto free;
- }
if (cfg->version != USB_STREAM_INTERFACE_VERSION) {
err = -ENXIO;
goto free;
@@ -478,6 +474,14 @@ static bool us122l_create_card(struct snd_card *card)
return true;
}
+static void snd_us122l_free(struct snd_card *card)
+{
+ struct us122l *us122l = US122L(card);
+ int index = us122l->chip.index;
+ if (index >= 0 && index < SNDRV_CARDS)
+ snd_us122l_card_used[index] = 0;
+}
+
static int usx2y_create_card(struct usb_device *device, struct snd_card **cardp)
{
int dev;
@@ -494,7 +498,7 @@ static int usx2y_create_card(struct usb_device *device, struct snd_card **cardp)
if (err < 0)
return err;
snd_us122l_card_used[US122L(card)->chip.index = dev] = 1;
-
+ card->private_free = snd_us122l_free;
US122L(card)->chip.dev = device;
US122L(card)->chip.card = card;
mutex_init(&US122L(card)->mutex);
@@ -588,7 +592,7 @@ static void snd_us122l_disconnect(struct usb_interface *intf)
}
usb_put_intf(intf);
- usb_put_dev(US122L(card)->chip.dev);
+ usb_put_dev(us122l->chip.dev);
while (atomic_read(&us122l->mmap_count))
msleep(500);