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ALSA: line6: Fix POD sysfs attributes segfault

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The commit 02fc76f6a changed base of the sysfs attributes from device to card.
The "show" callbacks dereferenced wrong objects because of this.

Fixes: 02fc76f6a7 ('ALSA: line6: Create sysfs via snd_card_add_dev_attr()')
Cc: <stable@vger.kernel.org> # v4.0+
Reviewed-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Andrej Krutak <dev@andree.sk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Andrej Krutak 2016-08-18 23:52:12 +02:00 committed by Takashi Iwai
parent adc8a43a6d
commit b027d11263
1 changed files with 6 additions and 6 deletions
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12
sound/usb/line6/pod.c
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@ -244,8 +244,8 @@ static int pod_set_system_param_int(struct usb_line6_pod *pod, int value,
static ssize_t serial_number_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct usb_interface *interface = to_usb_interface(dev);
struct usb_line6_pod *pod = usb_get_intfdata(interface);
struct snd_card *card = dev_to_snd_card(dev);
struct usb_line6_pod *pod = card->private_data;
return sprintf(buf, "%u\n", pod->serial_number);
}
@ -256,8 +256,8 @@ static ssize_t serial_number_show(struct device *dev,
static ssize_t firmware_version_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct usb_interface *interface = to_usb_interface(dev);
struct usb_line6_pod *pod = usb_get_intfdata(interface);
struct snd_card *card = dev_to_snd_card(dev);
struct usb_line6_pod *pod = card->private_data;
return sprintf(buf, "%d.%02d\n", pod->firmware_version / 100,
pod->firmware_version % 100);
@ -269,8 +269,8 @@ static ssize_t firmware_version_show(struct device *dev,
static ssize_t device_id_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct usb_interface *interface = to_usb_interface(dev);
struct usb_line6_pod *pod = usb_get_intfdata(interface);
struct snd_card *card = dev_to_snd_card(dev);
struct usb_line6_pod *pod = card->private_data;
return sprintf(buf, "%d\n", pod->device_id);
}