staging: rtl8712: check for alloc fail in _r8712_init_recv_priv()

The function _r8712_init_recv_priv() and also r8712_init_recv_priv()
just returns silently if they fail to allocate memory. Change their
return type to int and add necessary checks and handling if they return
-ENOMEM
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Signed-off-by: Nam Cao <namcaov@gmail.com>
Link: https://lore.kernel.org/r/506ac35a667e511db568b06b86834fd0ceeba453.1666688642.git.namcaov@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8712/os_intfs.c

@@ -309,7 +309,9 @@ int r8712_init_drv_sw(struct _adapter *padapter)
 	if (ret)
 		return ret;
 	_r8712_init_xmit_priv(&padapter->xmitpriv, padapter);
-	_r8712_init_recv_priv(&padapter->recvpriv, padapter);
+	ret = _r8712_init_recv_priv(&padapter->recvpriv, padapter);
+	if (ret)
+		return ret;
 	memset((unsigned char *)&padapter->securitypriv, 0,
 	       sizeof(struct security_priv));
 	timer_setup(&padapter->securitypriv.tkip_timer,

drivers/staging/rtl8712/recv_osdep.h

@@ -18,15 +18,15 @@
 #include "drv_types.h"
 #include <linux/skbuff.h>
 
-void _r8712_init_recv_priv(struct recv_priv *precvpriv,
-			   struct _adapter *padapter);
+int _r8712_init_recv_priv(struct recv_priv *precvpriv,
+			  struct _adapter *padapter);
 void _r8712_free_recv_priv(struct recv_priv *precvpriv);
 void r8712_recv_entry(union recv_frame *precv_frame);
 void r8712_recv_indicatepkt(struct _adapter *adapter,
 			    union recv_frame *precv_frame);
 void r8712_handle_tkip_mic_err(struct _adapter *padapter, u8 bgroup);
-void r8712_init_recv_priv(struct recv_priv *precvpriv,
-			  struct _adapter *padapter);
+int r8712_init_recv_priv(struct recv_priv *precvpriv,
+			 struct _adapter *padapter);
 void r8712_free_recv_priv(struct recv_priv *precvpriv);
 void r8712_os_recv_resource_alloc(struct _adapter *padapter,
 				  union recv_frame *precvframe);

drivers/staging/rtl8712/rtl8712_recv.c

@@ -30,8 +30,8 @@
 
 static void recv_tasklet(struct tasklet_struct *t);
 
-void r8712_init_recv_priv(struct recv_priv *precvpriv,
-			  struct _adapter *padapter)
+int r8712_init_recv_priv(struct recv_priv *precvpriv,
+			 struct _adapter *padapter)
 {
 	int i;
 	struct recv_buf *precvbuf;
@@ -44,7 +44,7 @@ void r8712_init_recv_priv(struct recv_priv *precvpriv,
 	precvpriv->pallocated_recv_buf =
 		kzalloc(NR_RECVBUFF * sizeof(struct recv_buf) + 4, GFP_ATOMIC);
 	if (!precvpriv->pallocated_recv_buf)
-		return;
+		return -ENOMEM;
 	precvpriv->precv_buf = precvpriv->pallocated_recv_buf + 4 -
 			      ((addr_t)(precvpriv->pallocated_recv_buf) & 3);
 	precvbuf = (struct recv_buf *)precvpriv->precv_buf;
@@ -75,6 +75,7 @@ void r8712_init_recv_priv(struct recv_priv *precvpriv,
 		}
 		pskb = NULL;
 	}
+	return 0;
 }
 
 void r8712_free_recv_priv(struct recv_priv *precvpriv)

drivers/staging/rtl8712/rtl871x_recv.c

@@ -42,9 +42,10 @@ void _r8712_init_sta_recv_priv(struct sta_recv_priv *psta_recvpriv)
 	_init_queue(&psta_recvpriv->defrag_q);
 }
 
-void _r8712_init_recv_priv(struct recv_priv *precvpriv,
-			   struct _adapter *padapter)
+int _r8712_init_recv_priv(struct recv_priv *precvpriv,
+			  struct _adapter *padapter)
 {
+	int ret;
 	sint i;
 	union recv_frame *precvframe;
 
@@ -58,7 +59,7 @@ void _r8712_init_recv_priv(struct recv_priv *precvpriv,
 				sizeof(union recv_frame) + RXFRAME_ALIGN_SZ,
 				GFP_ATOMIC);
 	if (!precvpriv->pallocated_frame_buf)
-		return;
+		return -ENOMEM;
 	precvpriv->precv_frame_buf = precvpriv->pallocated_frame_buf +
 				    RXFRAME_ALIGN_SZ -
 				    ((addr_t)(precvpriv->pallocated_frame_buf) &
@@ -73,7 +74,11 @@ void _r8712_init_recv_priv(struct recv_priv *precvpriv,
 		precvframe++;
 	}
 	precvpriv->rx_pending_cnt = 1;
-	r8712_init_recv_priv(precvpriv, padapter);
+	ret = r8712_init_recv_priv(precvpriv, padapter);
+	if (ret)
+		kfree(precvpriv->pallocated_frame_buf);
+
+	return ret;
 }
 
 void _r8712_free_recv_priv(struct recv_priv *precvpriv)