[PATCH -next] misc: fastrpc: Fix return value check in fastrpc_map_create()

[Wei Yongjun]

In case of error, the function dma_buf_get() returns ERR_PTR() and never
returns NULL. The NULL test in the return value check should be replaced
with IS_ERR().

Signed-off-by: Wei Yongjun <weiyongj...@huawei.com>
---
 drivers/misc/fastrpc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
index 4b0db33896df..7edceaa6adaa 100644
--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -496,8 +496,8 @@ static int fastrpc_map_create(struct fastrpc_user *fl, int 
fd,
        map->fl = fl;
        map->fd = fd;
        map->buf = dma_buf_get(fd);
-       if (!map->buf) {
-               err = -EINVAL;
+       if (IS_ERR(map->buf)) {
+               err = PTR_ERR(map->buf);
                goto get_err;
        }