staging: rtl*: Remove tasklet callback casts

In order to make the entire kernel usable under Clang's Control Flow
Integrity protections, function prototype casts need to be avoided
because this will trip CFI checks at runtime (i.e. a mismatch between
the caller's expected function prototype and the destination function's
prototype). Many of these cases can be found with -Wcast-function-type,
which found that the rtl wifi drivers had a bunch of needless function
casts. Remove function casts for tasklet callbacks in the various drivers.

Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/201911150926.2894A4F973@keescook
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/rtl8188eu/hal/rtl8188eu_recv.c b/drivers/staging/rtl8188eu/hal/rtl8188eu_recv.c
index c0d51ba70a751dc27673715099ba6bc5500c19c8..1cf8cff9a2a4d9416ed15e34974ad910b15c3d9f 100644 (file)
--- a/drivers/staging/rtl8188eu/hal/rtl8188eu_recv.c
+++ b/drivers/staging/rtl8188eu/hal/rtl8188eu_recv.c
@@ -22,8 +22,7 @@ int   rtw_hal_init_recv_priv(struct adapter *padapter)
        int     i, res = _SUCCESS;
        struct recv_buf *precvbuf;
 
-       tasklet_init(&precvpriv->recv_tasklet,
-                    (void(*)(unsigned long))rtl8188eu_recv_tasklet,
+       tasklet_init(&precvpriv->recv_tasklet, rtl8188eu_recv_tasklet,
                     (unsigned long)padapter);
 
        /* init recv_buf */

diff --git a/drivers/staging/rtl8188eu/hal/rtl8188eu_xmit.c b/drivers/staging/rtl8188eu/hal/rtl8188eu_xmit.c
index ab94ad9d608ae011205483eb978616c723e15b83..2808f2b119bf9f0917fd9962008ebb06182f03a7 100644 (file)
--- a/drivers/staging/rtl8188eu/hal/rtl8188eu_xmit.c
+++ b/drivers/staging/rtl8188eu/hal/rtl8188eu_xmit.c
@@ -17,8 +17,7 @@ s32 rtw_hal_init_xmit_priv(struct adapter *adapt)
 {
        struct xmit_priv *pxmitpriv = &adapt->xmitpriv;
 
-       tasklet_init(&pxmitpriv->xmit_tasklet,
-                    (void(*)(unsigned long))rtl8188eu_xmit_tasklet,
+       tasklet_init(&pxmitpriv->xmit_tasklet, rtl8188eu_xmit_tasklet,
                     (unsigned long)adapt);
        return _SUCCESS;
 }

diff --git a/drivers/staging/rtl8188eu/include/rtl8188e_recv.h b/drivers/staging/rtl8188eu/include/rtl8188e_recv.h
index c2c7ef974dc5c7a34d1431f9c0aa4234820347a5..23251ffa8404732ed801b5776bbd46f9d6067d91 100644 (file)
--- a/drivers/staging/rtl8188eu/include/rtl8188e_recv.h
+++ b/drivers/staging/rtl8188eu/include/rtl8188e_recv.h
@@ -43,7 +43,7 @@ enum rx_packet_type {
 };
 
 #define INTERRUPT_MSG_FORMAT_LEN 60
-void rtl8188eu_recv_tasklet(void *priv);
+void rtl8188eu_recv_tasklet(unsigned long priv);
 void rtl8188e_process_phy_info(struct adapter *padapter,
                               struct recv_frame *prframe);
 void update_recvframe_phyinfo_88e(struct recv_frame *fra, struct phy_stat *phy);

diff --git a/drivers/staging/rtl8188eu/include/rtl8188e_xmit.h b/drivers/staging/rtl8188eu/include/rtl8188e_xmit.h
index 421e9f45306f37ac49851947eaba4803872c1b9c..c6c2ad20d9cfc5cd6ada09602fddd2d203e68a9c 100644 (file)
--- a/drivers/staging/rtl8188eu/include/rtl8188e_xmit.h
+++ b/drivers/staging/rtl8188eu/include/rtl8188e_xmit.h
@@ -148,7 +148,7 @@ void rtl8188e_fill_fake_txdesc(struct adapter *padapter, u8 *pDesc,
 s32 rtl8188eu_init_xmit_priv(struct adapter *padapter);
 s32 rtl8188eu_xmit_buf_handler(struct adapter *padapter);
 #define hal_xmit_handler rtl8188eu_xmit_buf_handler
-void rtl8188eu_xmit_tasklet(void *priv);
+void rtl8188eu_xmit_tasklet(unsigned long priv);
 bool rtl8188eu_xmitframe_complete(struct adapter *padapter,
                                  struct xmit_priv *pxmitpriv);
 

diff --git a/drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c b/drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c
index aaab0d5774537238d487766c6cd8e818e90f3c67..3cd6da1f843d23a11a78ac512069392feb141dc4 100644 (file)
--- a/drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c
+++ b/drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c
@@ -773,10 +773,10 @@ void usb_write_port_cancel(struct adapter *padapter)
        }
 }
 
-void rtl8188eu_recv_tasklet(void *priv)
+void rtl8188eu_recv_tasklet(unsigned long priv)
 {
        struct sk_buff *pskb;
-       struct adapter *adapt = priv;
+       struct adapter *adapt = (struct adapter *)priv;
        struct recv_priv *precvpriv = &adapt->recvpriv;
 
        while (NULL != (pskb = skb_dequeue(&precvpriv->rx_skb_queue))) {
@@ -792,9 +792,9 @@ void rtl8188eu_recv_tasklet(void *priv)
        }
 }
 
-void rtl8188eu_xmit_tasklet(void *priv)
+void rtl8188eu_xmit_tasklet(unsigned long priv)
 {
-       struct adapter *adapt = priv;
+       struct adapter *adapt = (struct adapter *)priv;
        struct xmit_priv *pxmitpriv = &adapt->xmitpriv;
 
        if (check_fwstate(&adapt->mlmepriv, _FW_UNDER_SURVEY))

diff --git a/drivers/staging/rtl8192e/rtllib_softmac.c b/drivers/staging/rtl8192e/rtllib_softmac.c
index f2f7529e7c80e19aeeda0194594f45226d57bb6b..6e2f620afd14025bbc08dfff1c9805e4c5400a48 100644 (file)
--- a/drivers/staging/rtl8192e/rtllib_softmac.c
+++ b/drivers/staging/rtl8192e/rtllib_softmac.c
@@ -2044,8 +2044,9 @@ static short rtllib_sta_ps_sleep(struct rtllib_device *ieee, u64 *time)
 
 }
 
-static inline void rtllib_sta_ps(struct rtllib_device *ieee)
+static inline void rtllib_sta_ps(unsigned long data)
 {
+       struct rtllib_device *ieee = (struct rtllib_device *)data;
        u64 time;
        short sleep;
        unsigned long flags, flags2;
@@ -3027,9 +3028,7 @@ void rtllib_softmac_init(struct rtllib_device *ieee)
        spin_lock_init(&ieee->mgmt_tx_lock);
        spin_lock_init(&ieee->beacon_lock);
 
-       tasklet_init(&ieee->ps_task,
-            (void(*)(unsigned long)) rtllib_sta_ps,
-            (unsigned long)ieee);
+       tasklet_init(&ieee->ps_task, rtllib_sta_ps, (unsigned long)ieee);
 
 }
 

diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c
index bd5b554787d182fa6b3bb6a05e3d2303e01a9857..90692db81b71b35214e5990de75bdd9bae163eb3 100644 (file)
--- a/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c
+++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c
@@ -1683,8 +1683,9 @@ static short ieee80211_sta_ps_sleep(struct ieee80211_device *ieee, u32 *time_h,
        return 1;
 }
 
-static inline void ieee80211_sta_ps(struct ieee80211_device *ieee)
+static inline void ieee80211_sta_ps(unsigned long data)
 {
+       struct ieee80211_device *ieee = (struct ieee80211_device *)data;
        u32 th, tl;
        short sleep;
 
@@ -2593,9 +2594,7 @@ void ieee80211_softmac_init(struct ieee80211_device *ieee)
        spin_lock_init(&ieee->mgmt_tx_lock);
        spin_lock_init(&ieee->beacon_lock);
 
-       tasklet_init(&ieee->ps_task,
-                    (void(*)(unsigned long)) ieee80211_sta_ps,
-                    (unsigned long)ieee);
+       tasklet_init(&ieee->ps_task, ieee80211_sta_ps, (unsigned long)ieee);
 }
 
 void ieee80211_softmac_free(struct ieee80211_device *ieee)

diff --git a/drivers/staging/rtl8192u/r8192U_core.c b/drivers/staging/rtl8192u/r8192U_core.c
index 48f1591ed5b4b4dcbb9bdd4ac1a113b0ba6728cc..7e2cabd16e880d92602b4fca0ea71afaf60b41bd 100644 (file)
--- a/drivers/staging/rtl8192u/r8192U_core.c
+++ b/drivers/staging/rtl8192u/r8192U_core.c
@@ -2193,7 +2193,7 @@ static void rtl8192_init_priv_lock(struct r8192_priv *priv)
 
 static void rtl819x_watchdog_wqcallback(struct work_struct *work);
 
-static void rtl8192_irq_rx_tasklet(struct r8192_priv *priv);
+static void rtl8192_irq_rx_tasklet(unsigned long data);
 /* init tasklet and wait_queue here. only 2.6 above kernel is considered */
 #define DRV_NAME "wlan0"
 static void rtl8192_init_priv_task(struct net_device *dev)
@@ -2214,8 +2214,7 @@ static void rtl8192_init_priv_task(struct net_device *dev)
                          InitialGainOperateWorkItemCallBack);
        INIT_WORK(&priv->qos_activate, rtl8192_qos_activate);
 
-       tasklet_init(&priv->irq_rx_tasklet,
-                    (void(*)(unsigned long))rtl8192_irq_rx_tasklet,
+       tasklet_init(&priv->irq_rx_tasklet, rtl8192_irq_rx_tasklet,
                     (unsigned long)priv);
 }
 
@@ -4655,8 +4654,9 @@ static void rtl8192_rx_cmd(struct sk_buff *skb)
        }
 }
 
-static void rtl8192_irq_rx_tasklet(struct r8192_priv *priv)
+static void rtl8192_irq_rx_tasklet(unsigned long data)
 {
+       struct r8192_priv *priv = (struct r8192_priv *)data;
        struct sk_buff *skb;
        struct rtl8192_rx_info *info;
 

diff --git a/drivers/staging/rtl8712/rtl8712_recv.c b/drivers/staging/rtl8712/rtl8712_recv.c
index 06de031be6a9c23caad7b9610f6fa00150569b45..00ea0beb12c90d6bf57d1309ecdff361c9a1793b 100644 (file)
--- a/drivers/staging/rtl8712/rtl8712_recv.c
+++ b/drivers/staging/rtl8712/rtl8712_recv.c
@@ -33,7 +33,7 @@ static u8 bridge_tunnel_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8};
 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
 static u8 rfc1042_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};
 
-static void recv_tasklet(void *priv);
+static void recv_tasklet(unsigned long priv);
 
 void r8712_init_recv_priv(struct recv_priv *precvpriv,
                          struct _adapter *padapter)
@@ -65,8 +65,7 @@ void r8712_init_recv_priv(struct recv_priv *precvpriv,
                precvbuf++;
        }
        precvpriv->free_recv_buf_queue_cnt = NR_RECVBUFF;
-       tasklet_init(&precvpriv->recv_tasklet,
-                    (void(*)(unsigned long))recv_tasklet,
+       tasklet_init(&precvpriv->recv_tasklet, recv_tasklet,
                     (unsigned long)padapter);
        skb_queue_head_init(&precvpriv->rx_skb_queue);
 
@@ -1078,10 +1077,10 @@ static void recvbuf2recvframe(struct _adapter *padapter, struct sk_buff *pskb)
        } while ((transfer_len > 0) && pkt_cnt > 0);
 }
 
-static void recv_tasklet(void *priv)
+static void recv_tasklet(unsigned long priv)
 {
        struct sk_buff *pskb;
-       struct _adapter *padapter = priv;
+       struct _adapter *padapter = (struct _adapter *)priv;
        struct recv_priv *precvpriv = &padapter->recvpriv;
 
        while (NULL != (pskb = skb_dequeue(&precvpriv->rx_skb_queue))) {

diff --git a/drivers/staging/rtl8712/rtl871x_xmit.c b/drivers/staging/rtl8712/rtl871x_xmit.c
index cc5809e49e356fa8ff77f4afa96165adc5c30964..f0b85338b567cd5009935c12ef5d1a3ff57645c8 100644 (file)
--- a/drivers/staging/rtl8712/rtl871x_xmit.c
+++ b/drivers/staging/rtl8712/rtl871x_xmit.c
@@ -143,9 +143,8 @@ int _r8712_init_xmit_priv(struct xmit_priv *pxmitpriv,
        INIT_WORK(&padapter->wk_filter_rx_ff0, r8712_SetFilter);
        alloc_hwxmits(padapter);
        init_hwxmits(pxmitpriv->hwxmits, pxmitpriv->hwxmit_entry);
-       tasklet_init(&pxmitpriv->xmit_tasklet,
-               (void(*)(unsigned long))r8712_xmit_bh,
-               (unsigned long)padapter);
+       tasklet_init(&pxmitpriv->xmit_tasklet, r8712_xmit_bh,
+                    (unsigned long)padapter);
        return 0;
 }
 

diff --git a/drivers/staging/rtl8712/rtl871x_xmit.h b/drivers/staging/rtl8712/rtl871x_xmit.h
index b14da38bf65241ad2784f62986c9f47ea4007fb0..f227828094bfd9fc29b8e18cd0caa266b11545ff 100644 (file)
--- a/drivers/staging/rtl8712/rtl871x_xmit.h
+++ b/drivers/staging/rtl8712/rtl871x_xmit.h
@@ -277,7 +277,7 @@ int r8712_pre_xmit(struct _adapter *padapter, struct xmit_frame *pxmitframe);
 int r8712_xmit_enqueue(struct _adapter *padapter,
                       struct xmit_frame *pxmitframe);
 void r8712_xmit_direct(struct _adapter *padapter, struct xmit_frame *pxmitframe);
-void r8712_xmit_bh(void *priv);
+void r8712_xmit_bh(unsigned long priv);
 
 void xmitframe_xmitbuf_attach(struct xmit_frame *pxmitframe,
                        struct xmit_buf *pxmitbuf);

diff --git a/drivers/staging/rtl8712/usb_ops_linux.c b/drivers/staging/rtl8712/usb_ops_linux.c
index 9d290bc2fdb7f68e998af0a8cc6f4f59d0edc66e..0045da3bb69a61e63d7c6a98f38318fbe242d05f 100644 (file)
--- a/drivers/staging/rtl8712/usb_ops_linux.c
+++ b/drivers/staging/rtl8712/usb_ops_linux.c
@@ -308,10 +308,10 @@ void r8712_usb_read_port_cancel(struct _adapter *padapter)
        }
 }
 
-void r8712_xmit_bh(void *priv)
+void r8712_xmit_bh(unsigned long priv)
 {
        int ret = false;
-       struct _adapter *padapter = priv;
+       struct _adapter *padapter = (struct _adapter *)priv;
        struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 
        if (padapter->driver_stopped ||

diff --git a/drivers/staging/rtl8723bs/hal/rtl8723bs_recv.c b/drivers/staging/rtl8723bs/hal/rtl8723bs_recv.c
index e8577c084bbd69b54ea5074eaa8d6d33b93f7ecc..1e8b614434082988836fdd62b18ffecb159c11fc 100644 (file)
--- a/drivers/staging/rtl8723bs/hal/rtl8723bs_recv.c
+++ b/drivers/staging/rtl8723bs/hal/rtl8723bs_recv.c
@@ -230,7 +230,7 @@ static inline bool pkt_exceeds_tail(struct recv_priv *precvpriv,
        return false;
 }
 
-static void rtl8723bs_recv_tasklet(void *priv)
+static void rtl8723bs_recv_tasklet(unsigned long priv)
 {
        struct adapter *padapter;
        struct hal_com_data *p_hal_data;
@@ -244,7 +244,7 @@ static void rtl8723bs_recv_tasklet(void *priv)
        _pkt *pkt_copy = NULL;
        u8 shift_sz = 0, rx_report_sz = 0;
 
-       padapter = priv;
+       padapter = (struct adapter *)priv;
        p_hal_data = GET_HAL_DATA(padapter);
        precvpriv = &padapter->recvpriv;
        recv_buf_queue = &precvpriv->recv_buf_pending_queue;
@@ -462,11 +462,8 @@ s32 rtl8723bs_init_recv_priv(struct adapter *padapter)
                goto initbuferror;
 
        /* 3 2. init tasklet */
-       tasklet_init(
-               &precvpriv->recv_tasklet,
-               (void(*)(unsigned long))rtl8723bs_recv_tasklet,
-               (unsigned long)padapter
-       );
+       tasklet_init(&precvpriv->recv_tasklet, rtl8723bs_recv_tasklet,
+                    (unsigned long)padapter);
 
        goto exit;