GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-30 02:21:15 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

powerpc/perf: Return accordingly on invalid chip-id in

Browse source 
Nest hardware counter memory resides in a per-chip reserve-memory.
During nest_imc_event_init(), chip-id of the event-cpu is considered to
calculate the base memory addresss for that cpu. Return, proper error
condition if the chip_id calculated is invalid.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: 885dcd709b ("powerpc/perf: Add nest IMC PMU support")
Reviewed-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Anju T Sudhakar <anju@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Anju T Sudhakar 2018-11-27 13:54:52 +05:30 • committed by Michael Ellerman
parent 659a6e38db
commit a913e5e8b4
1 changed files with 5 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

5
arch/powerpc/perf/imc-pmu.c
View file

@ -487,6 +487,11 @@ static int nest_imc_event_init(struct perf_event *event)
* Get the base memory addresss for this cpu.
*/
chip_id = cpu_to_chip_id(event->cpu);
/* Return, if chip_id is not valid */
if (chip_id < 0)
return -ENODEV;
pcni = pmu->mem_info;
do {
if (pcni->id == chip_id) {