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| author | Takashi Iwai <tiwai@suse.de> | 2024-05-08 18:16:58 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2024-05-08 18:16:58 +0200 |
| commit | 9b61b2069681b60d0d0bedbd0fe3c70123dddb19 (patch) | |
| tree | 483407944dd3037584b8825e0d33feb7f4eddf5f /drivers/usb/core/sysfs.c | |
| parent | b9112b17950c955071abfd4331d4daa162d6ec4d (diff) | |
| parent | 2ff85dc64df5bc0ff12e2f4e23fae7bbadbf1d5d (diff) | |
| download | linux-stable-9b61b2069681b60d0d0bedbd0fe3c70123dddb19.tar.gz linux-stable-9b61b2069681b60d0d0bedbd0fe3c70123dddb19.tar.bz2 linux-stable-9b61b2069681b60d0d0bedbd0fe3c70123dddb19.zip | |
Merge branch 'topic/hda-config-pm-cleanup' into for-next
Pull HD-audio CONFIG_PM cleanup.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'drivers/usb/core/sysfs.c')
| -rw-r--r-- | drivers/usb/core/sysfs.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c index f98263e21c2a..d83231d6736a 100644 --- a/drivers/usb/core/sysfs.c +++ b/drivers/usb/core/sysfs.c @@ -1217,14 +1217,24 @@ static ssize_t interface_authorized_store(struct device *dev, { struct usb_interface *intf = to_usb_interface(dev); bool val; + struct kernfs_node *kn; if (kstrtobool(buf, &val) != 0) return -EINVAL; - if (val) + if (val) { usb_authorize_interface(intf); - else - usb_deauthorize_interface(intf); + } else { + /* + * Prevent deadlock if another process is concurrently + * trying to unregister intf. + */ + kn = sysfs_break_active_protection(&dev->kobj, &attr->attr); + if (kn) { + usb_deauthorize_interface(intf); + sysfs_unbreak_active_protection(kn); + } + } return count; } |