[PATCH v3 3/3] staging: rtl8712: Drop get_recvframe_data()

From: Kees Cook
Date: Tue Jan 18 2022 - 14:33:40 EST


As done for rtl8723bs and r8188eu, drop get_recvframe_data(), as it
introduces an impossible value (NULL) for the compiler to check code
paths against which could result in nonsensical warnings.

Cc: Larry Finger <Larry.Finger@xxxxxxxxxxxx>
Cc: Florian Schilhabel <florian.c.schilhabel@xxxxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Cc: Zhansaya Bagdauletkyzy <zhansayabagdaulet@xxxxxxxxx>
Cc: Ivan Safonov <insafonov@xxxxxxxxx>
Cc: linux-staging@xxxxxxxxxxxxxxx
Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
---
drivers/staging/rtl8712/rtl871x_recv.c | 4 ++--
drivers/staging/rtl8712/rtl871x_recv.h | 8 --------
2 files changed, 2 insertions(+), 10 deletions(-)

diff --git a/drivers/staging/rtl8712/rtl871x_recv.c b/drivers/staging/rtl8712/rtl871x_recv.c
index c23f6b376111..66cc50f24e29 100644
--- a/drivers/staging/rtl8712/rtl871x_recv.c
+++ b/drivers/staging/rtl8712/rtl871x_recv.c
@@ -234,7 +234,7 @@ union recv_frame *r8712_portctrl(struct _adapter *adapter,
u16 ether_type;

pstapriv = &adapter->stapriv;
- ptr = get_recvframe_data(precv_frame);
+ ptr = precv_frame->u.hdr.rx_data;
pfhdr = &precv_frame->u.hdr;
psta_addr = pfhdr->attrib.ta;
psta = r8712_get_stainfo(pstapriv, psta_addr);
@@ -593,7 +593,7 @@ int r8712_wlanhdr_to_ethhdr(union recv_frame *precvframe)
struct _adapter *adapter = precvframe->u.hdr.adapter;
struct mlme_priv *pmlmepriv = &adapter->mlmepriv;

- u8 *ptr = get_recvframe_data(precvframe); /*point to frame_ctrl field*/
+ u8 *ptr = precvframe->u.hdr.rx_data; /*point to frame_ctrl field*/
struct rx_pkt_attrib *pattrib = &precvframe->u.hdr.attrib;

if (pattrib->encrypt)
diff --git a/drivers/staging/rtl8712/rtl871x_recv.h b/drivers/staging/rtl8712/rtl871x_recv.h
index 1c8298bde033..0760bccbf389 100644
--- a/drivers/staging/rtl8712/rtl871x_recv.h
+++ b/drivers/staging/rtl8712/rtl871x_recv.h
@@ -139,14 +139,6 @@ static inline u8 *get_rxmem(union recv_frame *precvframe)
return precvframe->u.hdr.rx_head;
}

-static inline u8 *get_recvframe_data(union recv_frame *precvframe)
-{
- /* always return rx_data */
- if (!precvframe)
- return NULL;
- return precvframe->u.hdr.rx_data;
-}
-
static inline u8 *recvframe_pull(union recv_frame *precvframe, sint sz)
{
/* used for extract sz bytes from rx_data, update rx_data and return
--
2.30.2