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From:   Nam Cao <namcaov@gmail.com>
To:     Larry Finger <Larry.Finger@lwfinger.net>,
        Florian Schilhabel <florian.c.schilhabel@googlemail.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc:     namcaov@gmail.com, Dan Carpenter <dan.carpenter@oracle.com>,
        linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: [PATCH v2 2/4] staging: rtl8712: check for alloc fail in _r8712_init_recv_priv()
Date:   Tue, 25 Oct 2022 11:12:24 +0200
Message-Id: <506ac35a667e511db568b06b86834fd0ceeba453.1666688642.git.namcaov@gmail.com>
In-Reply-To: <cover.1666688642.git.namcaov@gmail.com>
References: <cover.1666688642.git.namcaov@gmail.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
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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

Signed-off-by: Nam Cao <namcaov@gmail.com>
---
 drivers/staging/rtl8712/os_intfs.c     |  4 +++-
 drivers/staging/rtl8712/recv_osdep.h   |  8 ++++----
 drivers/staging/rtl8712/rtl8712_recv.c |  7 ++++---
 drivers/staging/rtl8712/rtl871x_recv.c | 13 +++++++++----
 4 files changed, 20 insertions(+), 12 deletions(-)

diff --git a/drivers/staging/rtl8712/os_intfs.c b/drivers/staging/rtl8712/os_intfs.c
index 003e97205124..12adb470d216 100644
--- a/drivers/staging/rtl8712/os_intfs.c
+++ b/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,
diff --git a/drivers/staging/rtl8712/recv_osdep.h b/drivers/staging/rtl8712/recv_osdep.h
index d8c1fa74f544..fbe3f2868506 100644
--- a/drivers/staging/rtl8712/recv_osdep.h
+++ b/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);
diff --git a/drivers/staging/rtl8712/rtl8712_recv.c b/drivers/staging/rtl8712/rtl8712_recv.c
index 7f1fdd058551..7da014ab0723 100644
--- a/drivers/staging/rtl8712/rtl8712_recv.c
+++ b/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)
diff --git a/drivers/staging/rtl8712/rtl871x_recv.c b/drivers/staging/rtl8712/rtl871x_recv.c
index 4db7eed64a03..8a3566214af7 100644
--- a/drivers/staging/rtl8712/rtl871x_recv.c
+++ b/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)
-- 
2.25.1