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tee: add supp_nowait flag in tee_context struct

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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>
This commit is contained in:
Sumit Garg
2019-01-29 11:19:36 +05:30
committed by Jens Wiklander
parent 49a57857ae
commit 42bf4152d8
3 changed files with 28 additions and 1 deletions
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10
drivers/tee/optee/supp.c
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@@ -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;