diff options
Diffstat (limited to 'sys/dev/usb/usb_dev.c')
| -rw-r--r-- | sys/dev/usb/usb_dev.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/sys/dev/usb/usb_dev.c b/sys/dev/usb/usb_dev.c index e4471ae..6ad02a7 100644 --- a/sys/dev/usb/usb_dev.c +++ b/sys/dev/usb/usb_dev.c @@ -1116,9 +1116,14 @@ usb_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, int fflag, struct thread* usb_pause_mtx(NULL, hz / 128); - if (usb_ref_device(cpd, &refs, 1 /* need uref */)) { - err = ENXIO; - goto done; + while (usb_ref_device(cpd, &refs, 1 /* need uref */)) { + if (usb_ref_device(cpd, &refs, 0)) { + /* device no longer exits */ + err = ENXIO; + goto done; + } + usb_unref_device(cpd, &refs); + usb_pause_mtx(NULL, hz / 128); } } |
