From 3eaffa4a3fbc783d05bd075a67f5a741bb90a510 Mon Sep 17 00:00:00 2001
From: Ling Xu <quic_lxu5@quicinc.com>
Date: Fri, 8 Aug 2025 16:01:09 +0530
Subject: [PATCH] Remove fallback to default device open

In case of default domain ID, the device open request falls back to
DEFAUL_DEVICE which will be defined in the libs to which the application
is linked. Remove this legacy fallback logic to avoid any confusion
and unexpected observations.

Signed-off-by: Ling Xu <ling.xu@oss.qualcomm.com>
---
 inc/fastrpc_ioctl.h         |  18 ------------------
 src/adsp_default_listener.c |  23 +++++++++++++----------
 src/fastrpc_apps_user.c     |  27 ++++++---------------------
 src/fastrpc_ioctl.c         |   4 ++--
 src/gdsprpcd                | Bin 0 -> 18544 bytes
 5 files changed, 21 insertions(+), 51 deletions(-)
 create mode 100755 src/gdsprpcd

diff --git a/inc/fastrpc_ioctl.h b/inc/fastrpc_ioctl.h
index 779d0345..b9cee804 100644
--- a/inc/fastrpc_ioctl.h
+++ b/inc/fastrpc_ioctl.h
@@ -43,24 +43,6 @@
 
 #define FASTRPC_ATTR_NOVA (256)
 
-/* Secure and default device nodes */
-#if DEFAULT_DOMAIN_ID==ADSP_DOMAIN_ID
-	#define SECURE_DEVICE "/dev/fastrpc-adsp-secure"
-	#define DEFAULT_DEVICE "/dev/fastrpc-adsp"
-#elif DEFAULT_DOMAIN_ID==MDSP_DOMAIN_ID
-	#define SECURE_DEVICE "/dev/fastrpc-mdsp-secure"
-	#define DEFAULT_DEVICE "/dev/fastrpc-mdsp"
-#elif DEFAULT_DOMAIN_ID==SDSP_DOMAIN_ID
-	#define SECURE_DEVICE "/dev/fastrpc-sdsp-secure"
-	#define DEFAULT_DEVICE "/dev/fastrpc-sdsp"
-#elif DEFAULT_DOMAIN_ID==CDSP_DOMAIN_ID
-	#define SECURE_DEVICE "/dev/fastrpc-cdsp-secure"
-	#define DEFAULT_DEVICE "/dev/fastrpc-cdsp"
-#else
-	#define SECURE_DEVICE ""
-	#define DEFAULT_DEVICE ""
-#endif
-
 #define INITIALIZE_REMOTE_ARGS(total)	int *pfds = NULL; \
 					unsigned *pattrs = NULL; \
 					args = (struct fastrpc_invoke_args*) calloc(sizeof(*args), total);	\
diff --git a/src/adsp_default_listener.c b/src/adsp_default_listener.c
index e37648ae..901018dd 100644
--- a/src/adsp_default_listener.c
+++ b/src/adsp_default_listener.c
@@ -71,7 +71,7 @@ static domain_t *get_domain_uri(int domain_id) {
 }
 
 static const char *get_secure_device_name(int domain_id) {
-	const char *name;
+	const char *name = NULL;
 	int domain = GET_DOMAIN_FROM_EFFEC_DOMAIN_ID(domain_id);
 
 	switch (domain) {
@@ -97,15 +97,15 @@ static const char *get_secure_device_name(int domain_id) {
 		name = GDSP1_SECURE_DEVICE_NAME;
 		break;
 	default:
-		name = DEFAULT_DEVICE;
+		FARF(ERROR, "ERROR: %s Invalid domain_id %d", __func__, domain_id);
 		break;
 	}
 
 	return name;
 }
 
-static const char *get_default_device_name(int domain_id) {
-	const char *name;
+static const char *get_non_secure_device_name(int domain_id) {
+	const char *name = NULL;
 	int domain = GET_DOMAIN_FROM_EFFEC_DOMAIN_ID(domain_id);
 
 	switch (domain) {
@@ -131,7 +131,7 @@ static const char *get_default_device_name(int domain_id) {
 		name = GDSP1_DEVICE_NAME;
 		break;
 	default:
-		name = DEFAULT_DEVICE;
+		FARF(ERROR, "ERROR: %s Invalid domain_id %d", __func__, domain_id);
 		break;
 	}
 
@@ -152,6 +152,9 @@ static bool fastrpc_dev_exists(const char* dev_name)
 	char *path = NULL;
 	uint64_t len;
 
+	if (!dev_name)
+		return false;
+
 	len = snprintf(0, 0, "/dev/%s", dev_name) + 1;
 	if(NULL == (path = (char *)malloc(len * sizeof(char))))
 		return false;
@@ -172,13 +175,13 @@ static bool fastrpc_dev_exists(const char* dev_name)
 static int fastrpc_wait_for_device(int domain)
 {
 	int inotify_fd = -1, watch_fd = -1, err = 0;
-	const char *sec_dev_name = NULL, *def_dev_name = NULL;
+	const char *sec_dev_name = NULL, *non_sec_dev_name = NULL;
 	struct pollfd pfd[1];
 
 	sec_dev_name = get_secure_device_name(domain);
-	def_dev_name = get_default_device_name(domain);
+	non_sec_dev_name = get_non_secure_device_name(domain);
 
-	if (fastrpc_dev_exists(sec_dev_name) || fastrpc_dev_exists(def_dev_name))
+	if (fastrpc_dev_exists(sec_dev_name) || fastrpc_dev_exists(non_sec_dev_name))
 		return 0;
 
 	inotify_fd = inotify_init();
@@ -194,7 +197,7 @@ static int fastrpc_wait_for_device(int domain)
 		return AEE_EINVALIDFD;
 	}
 
-	if (fastrpc_dev_exists(sec_dev_name) || fastrpc_dev_exists(def_dev_name))
+	if (fastrpc_dev_exists(sec_dev_name) || fastrpc_dev_exists(non_sec_dev_name))
 		goto bail;
 
 	memset(pfd, 0 , sizeof(pfd));
@@ -231,7 +234,7 @@ static int fastrpc_wait_for_device(int domain)
 			/* Check if the event corresponds to the creation of the device node. */
 			if (event->wd == watch_fd && (event->mask & IN_CREATE) &&
 				((strcmp(sec_dev_name, event->name) == 0) ||
-				(strcmp(def_dev_name, event->name) == 0))) {
+				(strcmp(non_sec_dev_name, event->name) == 0))) {
 				/* Device node created, process proceed to open and use it. */
 				VERIFY_IPRINTF("Device node %s created!\n", event->name);
 				goto bail; /* Exit the loop after device creation is detected. */
diff --git a/src/fastrpc_apps_user.c b/src/fastrpc_apps_user.c
index 81fef0ab..4ada79aa 100644
--- a/src/fastrpc_apps_user.c
+++ b/src/fastrpc_apps_user.c
@@ -3254,7 +3254,7 @@ static void domain_deinit(int domain) {
 }
 
 static const char *get_domain_name(int domain_id) {
-  const char *name;
+  const char *name = NULL;
   int domain = GET_DOMAIN_FROM_EFFEC_DOMAIN_ID(domain_id);
 
   switch (domain) {
@@ -3280,7 +3280,7 @@ static const char *get_domain_name(int domain_id) {
     name = GDSP1RPC_DEVICE;
     break;
   default:
-    name = DEFAULT_DEVICE;
+    FARF(ERROR, "ERROR: %s Invalid domain_id %d", __func__, domain_id);
     break;
   }
   return name;
@@ -3305,20 +3305,9 @@ int open_device_node(int domain_id) {
       dev = open(get_domain_name(domain), O_NONBLOCK);
       if ((dev < 0) && (errno == ENOENT)) {
         FARF(RUNTIME_RPC_HIGH,
-             "Device node %s open failed for domain %d (errno %s),"
-             "falling back to node %s \n",
-             get_domain_name(domain), domain, strerror(errno), DEFAULT_DEVICE);
-        dev = open(DEFAULT_DEVICE, O_NONBLOCK);
+             "Device node %s open failed for domain %d (errno %s)\n",
+             get_domain_name(domain), domain, strerror(errno));
       }
-    } else if ((dev < 0) && (errno == EACCES)) {
-      // Open the default device node if unable to open the
-      // secure device node due to permissions
-      FARF(RUNTIME_RPC_HIGH,
-           "Device node %s open failed for domain %d (errno %s),"
-           "falling back to node %s \n",
-           get_secure_domain_name(domain), domain, strerror(errno),
-           DEFAULT_DEVICE);
-      dev = open(DEFAULT_DEVICE, O_NONBLOCK);
     }
     break;
   case CDSP_DOMAIN_ID:
@@ -3334,13 +3323,9 @@ int open_device_node(int domain_id) {
            get_domain_name(domain));
       dev = open(get_domain_name(domain), O_NONBLOCK);
       if ((dev < 0) && ((errno == ENOENT) || (errno == EACCES))) {
-        // Open the default device node if actual device node
-        // is not present
         FARF(RUNTIME_RPC_HIGH,
-             "Device node %s open failed for domain %d (errno %s),"
-             "falling back to node %s \n",
-             get_domain_name(domain), domain, strerror(errno), DEFAULT_DEVICE);
-        dev = open(DEFAULT_DEVICE, O_NONBLOCK);
+             "Device node %s open failed for domain %d (errno %s)\n",
+             get_domain_name(domain), domain, strerror(errno));
       }
     }
     break;
diff --git a/src/fastrpc_ioctl.c b/src/fastrpc_ioctl.c
index e0329e13..13e43782 100644
--- a/src/fastrpc_ioctl.c
+++ b/src/fastrpc_ioctl.c
@@ -21,7 +21,7 @@ int is_async_fastrpc_supported(void) {
  ADSP/SLPI/MDSP/CDSP - Return Secure node
  */
 const char *get_secure_domain_name(int domain_id) {
-  const char *name;
+  const char *name = NULL;
   int domain = GET_DOMAIN_FROM_EFFEC_DOMAIN_ID(domain_id);
 
   switch (domain) {
@@ -47,7 +47,7 @@ const char *get_secure_domain_name(int domain_id) {
     name = GDSP1RPC_SECURE_DEVICE;
     break;
   default:
-    name = DEFAULT_DEVICE;
+    FARF(ERROR, "ERROR: %s Invalid domain_id %d", __func__, domain_id);
     break;
   }
   return name;
diff --git a/src/gdsprpcd b/src/gdsprpcd
new file mode 100755
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GIT binary patch
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