dsp: return ENETRESET error if apr is down

In SSR/PDR, return ENETRESET errno to
propagate this failure to userspace. After
audio HAL receives ENETRESET, it stops retry
for pcm_open continuously. Rate limit the logs
when apr send packet fails during PDR/SSR
usecases to avoid watchdog timeouts.

Change-Id: I03a80aef6ffedb4f15f953fff5213d6a3c9efc4b
Signed-off-by: Laxminath Kasam <[email protected]>

dsp/q6afe.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2012-2019, The Linux Foundation. All rights reserved.
  */
 #include <linux/slab.h>
 #include <linux/debugfs.h>
@@ -866,7 +866,7 @@ int afe_q6_interface_prepare(void)
 			0xFFFFFFFF, &this_afe);
 		if (this_afe.apr == NULL) {
 			pr_err("%s: Unable to register AFE\n", __func__);
-			ret = -ENODEV;
+			ret = -ENETRESET;
 		}
 		rtac_set_afe_handle(this_afe.apr);
 	}

dsp/q6core.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2012-2019, The Linux Foundation. All rights reserved.
  */
 
 #include <linux/kernel.h>
@@ -432,7 +432,7 @@ void ocm_core_open(void)
 					aprv2_core_fn_q, 0xFFFFFFFF, NULL);
 	pr_debug("%s: Open_q %pK\n", __func__, q6core_lcl.core_handle_q);
 	if (q6core_lcl.core_handle_q == NULL)
-		pr_err("%s: Unable to register CORE\n", __func__);
+		pr_err_ratelimited("%s: Unable to register CORE\n", __func__);
 }
 
 struct cal_block_data *cal_utils_get_cal_block_by_key(
@@ -926,7 +926,7 @@ bool q6core_is_adsp_ready(void)
 		q6core_lcl.bus_bw_resp_received = 0;
 		rc = apr_send_pkt(q6core_lcl.core_handle_q, (uint32_t *)&hdr);
 		if (rc < 0) {
-			pr_err("%s: Get ADSP state APR packet send event %d\n",
+			pr_err_ratelimited("%s: Get ADSP state APR packet send event %d\n",
 				__func__, rc);
 			goto bail;
 		}

ipc/apr.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (c) 2010-2014, 2016-2018 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2010-2014, 2016-2019 The Linux Foundation. All rights reserved.
  */
 
 #include <linux/kernel.h>
@@ -368,13 +368,13 @@ int apr_send_pkt(void *handle, uint32_t *buf)
 		return -EINVAL;
 	}
 	if (svc->need_reset) {
-		pr_err("apr: send_pkt service need reset\n");
+		pr_err_ratelimited("apr: send_pkt service need reset\n");
 		return -ENETRESET;
 	}
 
 	if ((svc->dest_id == APR_DEST_QDSP6) &&
 	    (apr_get_q6_state() != APR_SUBSYS_LOADED)) {
-		pr_err("%s: Still dsp is not Up\n", __func__);
+		pr_err_ratelimited("%s: Still dsp is not Up\n", __func__);
 		return -ENETRESET;
 	} else if ((svc->dest_id == APR_DEST_MODEM) &&
 		   (apr_get_modem_state() == APR_SUBSYS_DOWN)) {
@@ -388,7 +388,7 @@ int apr_send_pkt(void *handle, uint32_t *buf)
 	clnt = &client[dest_id][client_id];
 
 	if (!client[dest_id][client_id].handle) {
-		pr_err("APR: Still service is not yet opened\n");
+		pr_err_ratelimited("APR: Still service is not yet opened\n");
 		spin_unlock_irqrestore(&svc->w_lock, flags);
 		return -EINVAL;
 	}
@@ -501,7 +501,7 @@ struct apr_svc *apr_register(char *dest, char *svc_name, apr_fn svc_fn,
 
 	if (dest_id == APR_DEST_QDSP6) {
 		if (apr_get_q6_state() != APR_SUBSYS_LOADED) {
-			pr_err("%s: adsp not up\n", __func__);
+			pr_err_ratelimited("%s: adsp not up\n", __func__);
 			return NULL;
 		}
 		pr_debug("%s: adsp Up\n", __func__);
@@ -525,7 +525,7 @@ struct apr_svc *apr_register(char *dest, char *svc_name, apr_fn svc_fn,
 	}
 
 	if (apr_get_svc(svc_name, domain_id, &client_id, &svc_idx, &svc_id)) {
-		pr_err("%s: apr_get_svc failed\n", __func__);
+		pr_err_ratelimited("%s: apr_get_svc failed\n", __func__);
 		goto done;
 	}
 
@@ -536,7 +536,7 @@ struct apr_svc *apr_register(char *dest, char *svc_name, apr_fn svc_fn,
 				APR_DL_SMD, apr_cb_func, NULL);
 		if (!clnt->handle) {
 			svc = NULL;
-			pr_err("APR: Unable to open handle\n");
+			pr_err_ratelimited("APR: Unable to open handle\n");
 			mutex_unlock(&clnt->m_lock);
 			goto done;
 		}
@@ -547,7 +547,7 @@ struct apr_svc *apr_register(char *dest, char *svc_name, apr_fn svc_fn,
 	clnt->id = client_id;
 	if (svc->need_reset) {
 		mutex_unlock(&svc->m_lock);
-		pr_err("APR: Service needs reset\n");
+		pr_err_ratelimited("APR: Service needs reset\n");
 		svc = NULL;
 		goto done;
 	}