[Coverity CID :206600] Logically dead code in drivers/crypto/crypto_mtls_shim.c

[zephyrbot]

Static code scan issues found in file:

https://github.com/zephyrproject-rtos/zephyr/tree/c9a2a5e7fb0194bfb168f5aa1a0a83c73f62acb3/drivers/crypto/crypto_mtls_shim.c#L267

Category: Control flow issues
Function: mtls_session_setup
Component: Drivers
CID: 206600

Details:

261                 LOG_ERR("AES_ECB: failed at setkey (%d)", ret);
262                 ctx->ops.block_crypt_hndlr = NULL;
263                 mtls_sessions[ctx_idx].in_use = false;
264                 return -EINVAL;
265             }
266             break;
>>>     CID 206600:  Control flow issues  (DEADCODE)
>>>     Execution cannot reach this statement: "case CRYPTO_CIPHER_MODE_CTR:".
267         case CRYPTO_CIPHER_MODE_CTR:
268             break;
269         case CRYPTO_CIPHER_MODE_CBC:
270             aes_ctx = &mtls_sessions[ctx_idx].mtls_aes;
271             mbedtls_aes_init(aes_ctx);
272             if (op_type == CRYPTO_CIPHER_OP_ENCRYPT) {

Please fix or provide comments in coverity using the link:

https://scan9.coverity.com/reports.htm#v32951/p12996.

Note: This issue was created automatically. Priority was set based on classification
of the file affected and the impact field in coverity. Assignees were set using the CODEOWNERS file.

[nashif]

Fixed by #23326