Fix NULL pointer dereference in ptp_clock_register. The argument
"parent" of ptp_clock_register may be NULL pointer.
Fixes:
73f37068d540 ("ptp: support ptp physical/virtual clocks conversion")
Reported-by: kernel test robot <oliver.sang@intel.com>
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
}
/* PTP virtual clock is being registered under physical clock */
- if (parent->class && parent->class->name &&
+ if (parent && parent->class && parent->class->name &&
strcmp(parent->class->name, "ptp") == 0)
ptp->is_virtual_clock = true;