diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
index 48d08eeb2d20..dd766c8018e4 100644
--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -139,14 +139,14 @@ struct fastrpc_mmap_rsp_msg {
 };
 
 struct fastrpc_mmap_req_msg {
-	s32 pgid;
+	s32 client_id;
 	u32 flags;
 	u64 vaddr;
 	s32 num;
 };
 
 struct fastrpc_mem_map_req_msg {
-	s32 pgid;
+	s32 client_id;
 	s32 fd;
 	s32 offset;
 	u32 flags;
@@ -156,20 +156,20 @@ struct fastrpc_mem_map_req_msg {
 };
 
 struct fastrpc_munmap_req_msg {
-	s32 pgid;
+	s32 client_id;
 	u64 vaddr;
 	u64 size;
 };
 
 struct fastrpc_mem_unmap_req_msg {
-	s32 pgid;
+	s32 client_id;
 	s32 fd;
 	u64 vaddrin;
 	u64 len;
 };
 
 struct fastrpc_msg {
-	int pid;		/* process group id */
+	int client_id;		/* process client id */
 	int tid;		/* thread id */
 	u64 ctx;		/* invoke caller context */
 	u32 handle;	/* handle to invoke */
@@ -234,7 +234,7 @@ struct fastrpc_invoke_ctx {
 	int nbufs;
 	int retval;
 	int pid;
-	int tgid;
+	int client_id;
 	u32 sc;
 	u32 *crc;
 	u64 ctxid;
@@ -299,7 +299,7 @@ struct fastrpc_user {
 	struct fastrpc_session_ctx *sctx;
 	struct fastrpc_buf *init_mem;
 
-	int tgid;
+	int client_id;
 	int pd;
 	bool is_secure_dev;
 	/* Lock for lists */
@@ -614,7 +614,7 @@ static struct fastrpc_invoke_ctx *fastrpc_context_alloc(
 	ctx->sc = sc;
 	ctx->retval = -1;
 	ctx->pid = current->pid;
-	ctx->tgid = user->tgid;
+	ctx->client_id = user->client_id;
 	ctx->cctx = cctx;
 	init_completion(&ctx->work);
 	INIT_WORK(&ctx->put_work, fastrpc_context_put_wq);
@@ -1115,11 +1115,11 @@ static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx,
 	int ret;
 
 	cctx = fl->cctx;
-	msg->pid = fl->tgid;
+	msg->client_id = fl->client_id;
 	msg->tid = current->pid;
 
 	if (kernel)
-		msg->pid = 0;
+		msg->client_id = 0;
 
 	msg->ctx = ctx->ctxid | fl->pd;
 	msg->handle = handle;
@@ -1244,7 +1244,7 @@ static int fastrpc_init_create_static_process(struct fastrpc_user *fl,
 	int err;
 	bool scm_done = false;
 	struct {
-		int pgid;
+		int client_id;
 		u32 namelen;
 		u32 pageslen;
 	} inbuf;
@@ -1293,7 +1293,7 @@ static int fastrpc_init_create_static_process(struct fastrpc_user *fl,
 		}
 	}
 
-	inbuf.pgid = fl->tgid;
+	inbuf.client_id = fl->client_id;
 	inbuf.namelen = init.namelen;
 	inbuf.pageslen = 0;
 	fl->pd = USER_PD;
@@ -1363,7 +1363,7 @@ static int fastrpc_init_create_process(struct fastrpc_user *fl,
 	int memlen;
 	int err;
 	struct {
-		int pgid;
+		int client_id;
 		u32 namelen;
 		u32 filelen;
 		u32 pageslen;
@@ -1395,7 +1395,7 @@ static int fastrpc_init_create_process(struct fastrpc_user *fl,
 		goto err;
 	}
 
-	inbuf.pgid = fl->tgid;
+	inbuf.client_id = fl->client_id;
 	inbuf.namelen = strlen(current->comm) + 1;
 	inbuf.filelen = init.filelen;
 	inbuf.pageslen = 1;
@@ -1469,8 +1469,9 @@ static int fastrpc_init_create_process(struct fastrpc_user *fl,
 }
 
 static struct fastrpc_session_ctx *fastrpc_session_alloc(
-					struct fastrpc_channel_ctx *cctx)
+					struct fastrpc_user *fl)
 {
+	struct fastrpc_channel_ctx *cctx = fl->cctx;
 	struct fastrpc_session_ctx *session = NULL;
 	unsigned long flags;
 	int i;
@@ -1480,6 +1481,8 @@ static struct fastrpc_session_ctx *fastrpc_session_alloc(
 		if (!cctx->session[i].used && cctx->session[i].valid) {
 			cctx->session[i].used = true;
 			session = &cctx->session[i];
+			/* any non-zero ID will work, session_idx + 1 is the simplest one */
+			fl->client_id = i + 1;
 			break;
 		}
 	}
@@ -1501,12 +1504,12 @@ static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx,
 static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl)
 {
 	struct fastrpc_invoke_args args[1];
-	int tgid = 0;
+	int client_id = 0;
 	u32 sc;
 
-	tgid = fl->tgid;
-	args[0].ptr = (u64)(uintptr_t) &tgid;
-	args[0].length = sizeof(tgid);
+	client_id = fl->client_id;
+	args[0].ptr = (u64)(uintptr_t) &client_id;
+	args[0].length = sizeof(client_id);
 	args[0].fd = -1;
 	sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0);
 
@@ -1579,11 +1582,10 @@ static int fastrpc_device_open(struct inode *inode, struct file *filp)
 	INIT_LIST_HEAD(&fl->maps);
 	INIT_LIST_HEAD(&fl->mmaps);
 	INIT_LIST_HEAD(&fl->user);
-	fl->tgid = current->tgid;
 	fl->cctx = cctx;
 	fl->is_secure_dev = fdevice->secure;
 
-	fl->sctx = fastrpc_session_alloc(cctx);
+	fl->sctx = fastrpc_session_alloc(fl);
 	if (!fl->sctx) {
 		dev_err(&cctx->rpdev->dev, "No session available\n");
 		mutex_destroy(&fl->mutex);
@@ -1647,11 +1649,11 @@ static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp)
 static int fastrpc_init_attach(struct fastrpc_user *fl, int pd)
 {
 	struct fastrpc_invoke_args args[1];
-	int tgid = fl->tgid;
+	int client_id = fl->client_id;
 	u32 sc;
 
-	args[0].ptr = (u64)(uintptr_t) &tgid;
-	args[0].length = sizeof(tgid);
+	args[0].ptr = (u64)(uintptr_t) &client_id;
+	args[0].length = sizeof(client_id);
 	args[0].fd = -1;
 	sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0);
 	fl->pd = pd;
@@ -1803,7 +1805,7 @@ static int fastrpc_req_munmap_impl(struct fastrpc_user *fl, struct fastrpc_buf *
 	int err;
 	u32 sc;
 
-	req_msg.pgid = fl->tgid;
+	req_msg.client_id = fl->client_id;
 	req_msg.size = buf->size;
 	req_msg.vaddr = buf->raddr;
 
@@ -1889,7 +1891,7 @@ static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp)
 		return err;
 	}
 
-	req_msg.pgid = fl->tgid;
+	req_msg.client_id = fl->client_id;
 	req_msg.flags = req.flags;
 	req_msg.vaddr = req.vaddrin;
 	req_msg.num = sizeof(pages);
@@ -1978,7 +1980,7 @@ static int fastrpc_req_mem_unmap_impl(struct fastrpc_user *fl, struct fastrpc_me
 		return -EINVAL;
 	}
 
-	req_msg.pgid = fl->tgid;
+	req_msg.client_id = fl->client_id;
 	req_msg.len = map->len;
 	req_msg.vaddrin = map->raddr;
 	req_msg.fd = map->fd;
@@ -2031,7 +2033,7 @@ static int fastrpc_req_mem_map(struct fastrpc_user *fl, char __user *argp)
 		return err;
 	}
 
-	req_msg.pgid = fl->tgid;
+	req_msg.client_id = fl->client_id;
 	req_msg.fd = req.fd;
 	req_msg.offset = req.offset;
 	req_msg.vaddrin = req.vaddrin;