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ALSA: usb-audio: Fix races at disconnection in mixer_quirks.c
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Similar like the previous commit, cover with chip->shutdown_rwsem
and chip->shutdown checks.

Reported-by: Matthieu CASTET <matthieu.castet@parrot.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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Takashi Iwai committed Oct 30, 2012
1 parent 34f3c89 commit 888ea7d
Showing 1 changed file with 51 additions and 7 deletions.
58 changes: 51 additions & 7 deletions sound/usb/mixer_quirks.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -283,6 +283,11 @@ static int snd_audigy2nx_led_put(struct snd_kcontrol *kcontrol, struct snd_ctl_e
if (value > 1)
return -EINVAL;
changed = value != mixer->audigy2nx_leds[index];
down_read(&mixer->chip->shutdown_rwsem);
if (mixer->chip->shutdown) {
err = -ENODEV;
goto out;
}
if (mixer->chip->usb_id == USB_ID(0x041e, 0x3042))
err = snd_usb_ctl_msg(mixer->chip->dev,
usb_sndctrlpipe(mixer->chip->dev, 0), 0x24,
Expand All @@ -299,6 +304,8 @@ static int snd_audigy2nx_led_put(struct snd_kcontrol *kcontrol, struct snd_ctl_e
usb_sndctrlpipe(mixer->chip->dev, 0), 0x24,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
value, index + 2, NULL, 0);
out:
up_read(&mixer->chip->shutdown_rwsem);
if (err < 0)
return err;
mixer->audigy2nx_leds[index] = value;
Expand Down Expand Up @@ -392,11 +399,16 @@ static void snd_audigy2nx_proc_read(struct snd_info_entry *entry,

for (i = 0; jacks[i].name; ++i) {
snd_iprintf(buffer, "%s: ", jacks[i].name);
err = snd_usb_ctl_msg(mixer->chip->dev,
down_read(&mixer->chip->shutdown_rwsem);
if (mixer->chip->shutdown)
err = 0;
else
err = snd_usb_ctl_msg(mixer->chip->dev,
usb_rcvctrlpipe(mixer->chip->dev, 0),
UAC_GET_MEM, USB_DIR_IN | USB_TYPE_CLASS |
USB_RECIP_INTERFACE, 0,
jacks[i].unitid << 8, buf, 3);
up_read(&mixer->chip->shutdown_rwsem);
if (err == 3 && (buf[0] == 3 || buf[0] == 6))
snd_iprintf(buffer, "%02x %02x\n", buf[1], buf[2]);
else
Expand Down Expand Up @@ -426,10 +438,15 @@ static int snd_xonar_u1_switch_put(struct snd_kcontrol *kcontrol,
else
new_status = old_status & ~0x02;
changed = new_status != old_status;
err = snd_usb_ctl_msg(mixer->chip->dev,
down_read(&mixer->chip->shutdown_rwsem);
if (mixer->chip->shutdown)
err = -ENODEV;
else
err = snd_usb_ctl_msg(mixer->chip->dev,
usb_sndctrlpipe(mixer->chip->dev, 0), 0x08,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
50, 0, &new_status, 1);
up_read(&mixer->chip->shutdown_rwsem);
if (err < 0)
return err;
mixer->xonar_u1_status = new_status;
Expand Down Expand Up @@ -468,11 +485,17 @@ static int snd_nativeinstruments_control_get(struct snd_kcontrol *kcontrol,
u8 bRequest = (kcontrol->private_value >> 16) & 0xff;
u16 wIndex = kcontrol->private_value & 0xffff;
u8 tmp;
int ret;

int ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), bRequest,
down_read(&mixer->chip->shutdown_rwsem);
if (mixer->chip->shutdown)
ret = -ENODEV;
else
ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), bRequest,
USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
0, cpu_to_le16(wIndex),
&tmp, sizeof(tmp), 1000);
up_read(&mixer->chip->shutdown_rwsem);

if (ret < 0) {
snd_printk(KERN_ERR
Expand All @@ -493,11 +516,17 @@ static int snd_nativeinstruments_control_put(struct snd_kcontrol *kcontrol,
u8 bRequest = (kcontrol->private_value >> 16) & 0xff;
u16 wIndex = kcontrol->private_value & 0xffff;
u16 wValue = ucontrol->value.integer.value[0];
int ret;

int ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), bRequest,
down_read(&mixer->chip->shutdown_rwsem);
if (mixer->chip->shutdown)
ret = -ENODEV;
else
ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), bRequest,
USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
cpu_to_le16(wValue), cpu_to_le16(wIndex),
NULL, 0, 1000);
up_read(&mixer->chip->shutdown_rwsem);

if (ret < 0) {
snd_printk(KERN_ERR
Expand Down Expand Up @@ -656,11 +685,16 @@ static int snd_ftu_eff_switch_get(struct snd_kcontrol *kctl,
return -EINVAL;


err = snd_usb_ctl_msg(chip->dev,
down_read(&mixer->chip->shutdown_rwsem);
if (mixer->chip->shutdown)
err = -ENODEV;
else
err = snd_usb_ctl_msg(chip->dev,
usb_rcvctrlpipe(chip->dev, 0), UAC_GET_CUR,
USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
validx << 8, snd_usb_ctrl_intf(chip) | (id << 8),
value, val_len);
up_read(&mixer->chip->shutdown_rwsem);
if (err < 0)
return err;

Expand Down Expand Up @@ -703,11 +737,16 @@ static int snd_ftu_eff_switch_put(struct snd_kcontrol *kctl,

if (!pval->is_cached) {
/* Read current value */
err = snd_usb_ctl_msg(chip->dev,
down_read(&mixer->chip->shutdown_rwsem);
if (mixer->chip->shutdown)
err = -ENODEV;
else
err = snd_usb_ctl_msg(chip->dev,
usb_rcvctrlpipe(chip->dev, 0), UAC_GET_CUR,
USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
validx << 8, snd_usb_ctrl_intf(chip) | (id << 8),
value, val_len);
up_read(&mixer->chip->shutdown_rwsem);
if (err < 0)
return err;

Expand All @@ -719,11 +758,16 @@ static int snd_ftu_eff_switch_put(struct snd_kcontrol *kctl,
if (cur_val != new_val) {
value[0] = new_val;
value[1] = 0;
err = snd_usb_ctl_msg(chip->dev,
down_read(&mixer->chip->shutdown_rwsem);
if (mixer->chip->shutdown)
err = -ENODEV;
else
err = snd_usb_ctl_msg(chip->dev,
usb_sndctrlpipe(chip->dev, 0), UAC_SET_CUR,
USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
validx << 8, snd_usb_ctrl_intf(chip) | (id << 8),
value, val_len);
up_read(&mixer->chip->shutdown_rwsem);
if (err < 0)
return err;

Expand Down

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