diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2024-04-19 08:57:14 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2024-04-19 09:02:22 -0400 |
| commit | a96cb3bf390eebfead5fc7a2092f8452a7997d1b (patch) | |
| tree | d0e16dc3e903ce705f85c4c334d750b4b304a0f0 /drivers/usb/core/sysfs.c | |
| parent | 1ab157ce573f5abd932b72679a7c67b1ed0bff13 (diff) | |
| parent | b377c66ae3509ccea596512d6afb4777711c4870 (diff) | |
Merge x86 bugfixes from Linux 6.9-rc3
Pull fix for SEV-SNP late disable bugs.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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; } |