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| author | Sumit Garg <sumit.garg@linaro.org> | 2019-01-29 11:19:36 +0530 |
|---|---|---|
| committer | Jens Wiklander <jens.wiklander@linaro.org> | 2019-02-01 15:12:46 +0100 |
| commit | 42bf4152d8a79f89f5456dee63a1f364fbce2dd6 (patch) | |
| tree | 4f89fc2690e28b92610cfc5f7a9a31beb481c2e6 /drivers/tee/optee | |
| parent | 49a57857aeea06ca831043acbb0fa5e0f50602fd (diff) | |
| download | linux-42bf4152d8a79f89f5456dee63a1f364fbce2dd6.tar.bz2 | |
tee: add supp_nowait flag in tee_context struct
This flag indicates that requests in this context should not wait for
tee-supplicant daemon to be started if not present and just return
with an error code. It is needed for requests which should be
non-blocking in nature like ones arising from TEE based kernel drivers
or any in kernel api that uses TEE internal client interface.
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Diffstat (limited to 'drivers/tee/optee')
| -rw-r--r-- | drivers/tee/optee/supp.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/tee/optee/supp.c b/drivers/tee/optee/supp.c index 43626e15703a..92f56b8645e3 100644 --- a/drivers/tee/optee/supp.c +++ b/drivers/tee/optee/supp.c @@ -88,10 +88,18 @@ u32 optee_supp_thrd_req(struct tee_context *ctx, u32 func, size_t num_params, { struct optee *optee = tee_get_drvdata(ctx->teedev); struct optee_supp *supp = &optee->supp; - struct optee_supp_req *req = kzalloc(sizeof(*req), GFP_KERNEL); + struct optee_supp_req *req; bool interruptable; u32 ret; + /* + * Return in case there is no supplicant available and + * non-blocking request. + */ + if (!supp->ctx && ctx->supp_nowait) + return TEEC_ERROR_COMMUNICATION; + + req = kzalloc(sizeof(*req), GFP_KERNEL); if (!req) return TEEC_ERROR_OUT_OF_MEMORY; |