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optee: add error checks in optee_ffa_do_call_with_arg()

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Adds error checking in optee_ffa_do_call_with_arg() for correctness.

Fixes: 4615e5a34b95 ("optee: add FF-A support")
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
This commit is contained in:
Jens Wiklander 2021-12-28 21:25:57 +01:00
parent abc8dc34d1
commit 4064c46114
1 changed files with 12 additions and 3 deletions
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15
drivers/tee/optee/ffa_abi.c
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@ -619,9 +619,18 @@ static int optee_ffa_do_call_with_arg(struct tee_context *ctx,
.data2 = (u32)(shm->sec_world_id >> 32),
.data3 = shm->offset,
};
struct optee_msg_arg *arg = tee_shm_get_va(shm, 0);
unsigned int rpc_arg_offs = OPTEE_MSG_GET_ARG_SIZE(arg->num_params);
struct optee_msg_arg *rpc_arg = tee_shm_get_va(shm, rpc_arg_offs);
struct optee_msg_arg *arg;
unsigned int rpc_arg_offs;
struct optee_msg_arg *rpc_arg;
arg = tee_shm_get_va(shm, 0);
if (IS_ERR(arg))
return PTR_ERR(arg);
rpc_arg_offs = OPTEE_MSG_GET_ARG_SIZE(arg->num_params);
rpc_arg = tee_shm_get_va(shm, rpc_arg_offs);
if (IS_ERR(rpc_arg))
return PTR_ERR(rpc_arg);
return optee_ffa_yielding_call(ctx, &data, rpc_arg);
}