On 1.10.2015 17:54, Matthew R. Ochs wrote: > From: Manoj Kumar <kuma...@us.ibm.com> > > If two concurrent MANAGE_LUN ioctls are issued with the same > WWID parameter, it would result in an incorrect value of port_sel. > > This is because port_sel is modified without any locks being > held. If the first caller stalls after the return from > find_and_create_lun(), the value of port_sel will be set > incorrectly to indicate a single port, though in this case > it should have been set to both ports. > > To fix, use the global mutex to serialize the lookup of the > WWID and the subsequent modification of port_sel. > > Signed-off-by: Matthew R. Ochs <mro...@linux.vnet.ibm.com> > Signed-off-by: Manoj N. Kumar <ma...@linux.vnet.ibm.com> > Reviewed-by: Brian King <brk...@linux.vnet.ibm.com>
Reviewed-by: Tomas Henzl <the...@redhat.com> Tomas _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
