[PATCH v4 1/4] misc: fastrpc: Fix initial memory allocation for Audio PD memory pool

[Jianping Li <jianping.li@oss.qualcomm.com>]

From: Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>

The initial buffer allocated for the Audio PD memory pool is never added
to the pool because pageslen is set to 0. As a result, the buffer is not
registered with Audio PD and is never used, causing a memory leak. Audio
PD immediately falls back to allocating memory from the remote heap since
the pool starts out empty.

Fix this by setting pageslen to 1 so that the initially allocated buffer
is correctly registered and becomes part of the Audio PD memory pool.

Fixes: 0871561055e66 ("misc: fastrpc: Add support for audiopd")
Cc: stable@kernel.org
Co-developed-by: Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>
Signed-off-by: Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>
Signed-off-by: Jianping Li <jianping.li@oss.qualcomm.com>
---
 drivers/misc/fastrpc.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
index 47356a5d5804..b87a5f97c96f 100644
--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -1324,7 +1324,9 @@ static int fastrpc_init_create_static_process(struct fastrpc_user *fl,
 		err = PTR_ERR(name);
 		goto err;
 	}
-
+	inbuf.client_id = fl->client_id;
+	inbuf.namelen = init.namelen;
+	inbuf.pageslen = 0;
 	if (!fl->cctx->remote_heap) {
 		err = fastrpc_remote_heap_alloc(fl, fl->sctx->dev, init.memlen,
 						&fl->cctx->remote_heap);
@@ -1347,12 +1349,10 @@ static int fastrpc_init_create_static_process(struct fastrpc_user *fl,
 				goto err_map;
 			}
 			scm_done = true;
+			inbuf.pageslen = 1;
 		}
 	}
 
-	inbuf.client_id = fl->client_id;
-	inbuf.namelen = init.namelen;
-	inbuf.pageslen = 0;
 	fl->pd = USER_PD;
 
 	args[0].ptr = (u64)(uintptr_t)&inbuf;
-- 
2.43.0