[PATCH 0/2] optee: fix OOM seen due to tee_shm_free()

Allen Pais
2021-02-17T09:28:24Z

From: Allen Pais <apais@linux.microsoft.com>

The following out of memory errors are seen on kexec reboot
from the optee core.

[ 0.368428] tee_bnxt_fw optee-clnt0: tee_shm_alloc failed
[ 0.368461] tee_bnxt_fw: probe of optee-clnt0 failed with error -22

tee_shm_release() is not invoked on dma shm buffer.

Implement .shutdown() in optee core as well as bnxt firmware driver
to handle the release of the buffers correctly.

More info:
https://github.com/OP-TEE/optee_os/issues/3637

Allen Pais (2):
optee: fix tee out of memory failure seen during kexec reboot
firmware: tee_bnxt: implement shutdown method to handle kexec reboots

drivers/firmware/broadcom/tee_bnxt_fw.c | 9 ++++
drivers/tee/optee/core.c | 69 ++++++++++++++++++-------
2 files changed, 58 insertions(+), 20 deletions(-)

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2.25.1