powerpc/perf: Return accordingly on invalid chip-id in
authorAnju T Sudhakar <anju@linux.vnet.ibm.com>
Tue, 27 Nov 2018 08:24:52 +0000 (13:54 +0530)
committerMichael Ellerman <mpe@ellerman.id.au>
Thu, 2 May 2019 16:54:59 +0000 (02:54 +1000)
commita913e5e8b43be1d3897a141ce61c1ec071cad89c
tree7f1b3ef5e5324df128785e2216ebedf7b4666ee1
parent659a6e38db0b422c63fd68ca7e78a8daadca061e
powerpc/perf: Return accordingly on invalid chip-id in

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: 885dcd709ba91 ("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>
arch/powerpc/perf/imc-pmu.c