path: root/drivers/scsi/scsi_transport_sas.c
diff options
authorJames Smart <jsmart2021@gmail.com>2019-11-21 09:55:56 -0800
committerMartin K. Petersen <martin.petersen@oracle.com>2019-11-21 20:49:50 -0500
commiteede4970fb6c29f2056d7d016a3764c90e9d8a65 (patch)
treefa89560199df9329090780bec49e12583854b71d /drivers/scsi/scsi_transport_sas.c
parentscsi: ibmvscsi_tgt: Remove unneeded variable rc (diff)
scsi: lpfc: size cpu map by last cpu id set
Currently the lpfc driver sizes its cpu_map array based on num_possible_cpus(). However, that can be a value that is less than the highest cpu id bit that is set. As such, if a thread runs on a cpu with a larger cpu id, or for_each_possible_cpu() is used, the driver could index off the end of the array and return garbage or GPF. The driver maintains its own internal copy of the "num_possible" cpu value and sizes arrays by it. Fix by setting the driver's value to the value of the last cpu id bit set in the possible_mask - plus 1. Thus cpu_map will be sized to allow access by any cpu id possible. Link: https://lore.kernel.org/r/20191121175556.18953-1-jsmart2021@gmail.com Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com> Signed-off-by: James Smart <jsmart2021@gmail.com> Reviewed-by: Ewan D. Milne <emilne@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/scsi_transport_sas.c')
0 files changed, 0 insertions, 0 deletions