mISDN: Delete unnecessary checks before the macro call “dev_kfree_skb”

The dev_kfree_skb() function performs also input parameter validation.
Thus the test around the shown calls is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

10 files changed, 20 insertions, 40 deletions

diff --git a/drivers/isdn/hardware/mISDN/avmfritz.c b/drivers/isdn/hardware/mISDN/avmfritz.c
index 81f2b183acc8..1137dd152b5c 100644
--- a/drivers/isdn/hardware/mISDN/avmfritz.c
+++ b/drivers/isdn/hardware/mISDN/avmfritz.c
@@ -509,8 +509,7 @@ HDLC_irq_xpr(struct bchannel *bch)
         if (bch->tx_skb && bch->tx_idx < bch->tx_skb->len) {
                 hdlc_fill_fifo(bch);
         } else {
-                if (bch->tx_skb)
-                        dev_kfree_skb(bch->tx_skb);
+                dev_kfree_skb(bch->tx_skb);
                 if (get_next_bframe(bch)) {
                         hdlc_fill_fifo(bch);
                         test_and_clear_bit(FLG_TX_EMPTY, &bch->Flags);
diff --git a/drivers/isdn/hardware/mISDN/hfcpci.c b/drivers/isdn/hardware/mISDN/hfcpci.c
index 4a069582fc6b..2330a7d24267 100644
--- a/drivers/isdn/hardware/mISDN/hfcpci.c
+++ b/drivers/isdn/hardware/mISDN/hfcpci.c
@@ -1119,8 +1119,7 @@ tx_birq(struct bchannel *bch)
         if (bch->tx_skb && bch->tx_idx < bch->tx_skb->len)
                 hfcpci_fill_fifo(bch);
         else {
-                if (bch->tx_skb)
-                        dev_kfree_skb(bch->tx_skb);
+                dev_kfree_skb(bch->tx_skb);
                 if (get_next_bframe(bch))
                         hfcpci_fill_fifo(bch);
         }
@@ -1132,8 +1131,7 @@ tx_dirq(struct dchannel *dch)
         if (dch->tx_skb && dch->tx_idx < dch->tx_skb->len)
                 hfcpci_fill_dfifo(dch->hw);
         else {
-                if (dch->tx_skb)
-                        dev_kfree_skb(dch->tx_skb);
+                dev_kfree_skb(dch->tx_skb);
                 if (get_next_dframe(dch))
                         hfcpci_fill_dfifo(dch->hw);
         }
diff --git a/drivers/isdn/hardware/mISDN/mISDNipac.c b/drivers/isdn/hardware/mISDN/mISDNipac.c
index f915399d75ca..bca880213e91 100644
--- a/drivers/isdn/hardware/mISDN/mISDNipac.c
+++ b/drivers/isdn/hardware/mISDN/mISDNipac.c
@@ -190,8 +190,7 @@ isac_rme_irq(struct isac_hw *isac)
 #endif
                 }
                 WriteISAC(isac, ISAC_CMDR, 0x80);
-                if (isac->dch.rx_skb)
-                        dev_kfree_skb(isac->dch.rx_skb);
+                dev_kfree_skb(isac->dch.rx_skb);
                 isac->dch.rx_skb = NULL;
         } else {
                 count = ReadISAC(isac, ISAC_RBCL) & 0x1f;
@@ -210,8 +209,7 @@ isac_xpr_irq(struct isac_hw *isac)
         if (isac->dch.tx_skb && isac->dch.tx_idx < isac->dch.tx_skb->len) {
                 isac_fill_fifo(isac);
         } else {
-                if (isac->dch.tx_skb)
-                        dev_kfree_skb(isac->dch.tx_skb);
+                dev_kfree_skb(isac->dch.tx_skb);
                 if (get_next_dframe(&isac->dch))
                         isac_fill_fifo(isac);
         }
@@ -464,8 +462,7 @@ isacsx_rme_irq(struct isac_hw *isac)
                         isac->dch.err_crc++;
 #endif
                 WriteISAC(isac, ISACX_CMDRD, ISACX_CMDRD_RMC);
-                if (isac->dch.rx_skb)
-                        dev_kfree_skb(isac->dch.rx_skb);
+                dev_kfree_skb(isac->dch.rx_skb);
                 isac->dch.rx_skb = NULL;
         } else {
                 count = ReadISAC(isac, ISACX_RBCLD) & 0x1f;
@@ -1012,8 +1009,7 @@ hscx_xpr(struct hscx_hw *hx)
         if (hx->bch.tx_skb && hx->bch.tx_idx < hx->bch.tx_skb->len) {
                 hscx_fill_fifo(hx);
         } else {
-                if (hx->bch.tx_skb)
-                        dev_kfree_skb(hx->bch.tx_skb);
+                dev_kfree_skb(hx->bch.tx_skb);
                 if (get_next_bframe(&hx->bch)) {
                         hscx_fill_fifo(hx);
                         test_and_clear_bit(FLG_TX_EMPTY, &hx->bch.Flags);
diff --git a/drivers/isdn/hardware/mISDN/mISDNisar.c b/drivers/isdn/hardware/mISDN/mISDNisar.c
index fd5c52f37802..4a3e748a1c26 100644
--- a/drivers/isdn/hardware/mISDN/mISDNisar.c
+++ b/drivers/isdn/hardware/mISDN/mISDNisar.c
@@ -690,8 +690,7 @@ send_next(struct isar_ch *ch)
                         }
                 }
         }
-        if (ch->bch.tx_skb)
-                dev_kfree_skb(ch->bch.tx_skb);
+        dev_kfree_skb(ch->bch.tx_skb);
         if (get_next_bframe(&ch->bch)) {
                 isar_fill_fifo(ch);
                 test_and_clear_bit(FLG_TX_EMPTY, &ch->bch.Flags);
diff --git a/drivers/isdn/hardware/mISDN/netjet.c b/drivers/isdn/hardware/mISDN/netjet.c
index 4e30affd1a7c..61caa7e50b9a 100644
--- a/drivers/isdn/hardware/mISDN/netjet.c
+++ b/drivers/isdn/hardware/mISDN/netjet.c
@@ -605,8 +605,7 @@ bc_next_frame(struct tiger_ch *bc)
         if (bc->bch.tx_skb && bc->bch.tx_idx < bc->bch.tx_skb->len) {
                 fill_dma(bc);
         } else {
-                if (bc->bch.tx_skb)
-                        dev_kfree_skb(bc->bch.tx_skb);
+                dev_kfree_skb(bc->bch.tx_skb);
                 if (get_next_bframe(&bc->bch)) {
                         fill_dma(bc);
                         test_and_clear_bit(FLG_TX_EMPTY, &bc->bch.Flags);
diff --git a/drivers/isdn/hardware/mISDN/w6692.c b/drivers/isdn/hardware/mISDN/w6692.c
index 2402608dc98d..bad55fdacd36 100644
--- a/drivers/isdn/hardware/mISDN/w6692.c
+++ b/drivers/isdn/hardware/mISDN/w6692.c
@@ -356,8 +356,7 @@ handle_rxD(struct w6692_hw *card) {
                         card->dch.err_rx++;
 #endif
                 }
-                if (card->dch.rx_skb)
-                        dev_kfree_skb(card->dch.rx_skb);
+                dev_kfree_skb(card->dch.rx_skb);
                 card->dch.rx_skb = NULL;
                 WriteW6692(card, W_D_CMDR, W_D_CMDR_RACK | W_D_CMDR_RRST);
         } else {
@@ -376,8 +375,7 @@ handle_txD(struct w6692_hw *card) {
         if (card->dch.tx_skb && card->dch.tx_idx < card->dch.tx_skb->len) {
                 W6692_fill_Dfifo(card);
         } else {
-                if (card->dch.tx_skb)
-                        dev_kfree_skb(card->dch.tx_skb);
+                dev_kfree_skb(card->dch.tx_skb);
                 if (get_next_dframe(&card->dch))
                         W6692_fill_Dfifo(card);
         }
@@ -636,8 +634,7 @@ send_next(struct w6692_ch *wch)
         if (wch->bch.tx_skb && wch->bch.tx_idx < wch->bch.tx_skb->len) {
                 W6692_fill_Bfifo(wch);
         } else {
-                if (wch->bch.tx_skb)
-                        dev_kfree_skb(wch->bch.tx_skb);
+                dev_kfree_skb(wch->bch.tx_skb);
                 if (get_next_bframe(&wch->bch)) {
                         W6692_fill_Bfifo(wch);
                         test_and_clear_bit(FLG_TX_EMPTY, &wch->bch.Flags);
diff --git a/drivers/isdn/mISDN/l1oip_core.c b/drivers/isdn/mISDN/l1oip_core.c
index 447f241467bd..b57dcb834594 100644
--- a/drivers/isdn/mISDN/l1oip_core.c
+++ b/drivers/isdn/mISDN/l1oip_core.c
@@ -1254,8 +1254,7 @@ release_card(struct l1oip *hc)
                         mISDN_freebchannel(hc->chan[ch].bch);
                         kfree(hc->chan[ch].bch);
 #ifdef REORDER_DEBUG
-                        if (hc->chan[ch].disorder_skb)
-                                dev_kfree_skb(hc->chan[ch].disorder_skb);
+                        dev_kfree_skb(hc->chan[ch].disorder_skb);
 #endif
                 }
         }
diff --git a/drivers/isdn/mISDN/layer2.c b/drivers/isdn/mISDN/layer2.c
index 68a481516729..5bf7fcb282c4 100644
--- a/drivers/isdn/mISDN/layer2.c
+++ b/drivers/isdn/mISDN/layer2.c
@@ -900,8 +900,7 @@ l2_disconnect(struct FsmInst *fi, int event, void *arg)
         send_uframe(l2, NULL, DISC | 0x10, CMD);
         mISDN_FsmDelTimer(&l2->t203, 1);
         restart_t200(l2, 2);
-        if (skb)
-                dev_kfree_skb(skb);
+        dev_kfree_skb(skb);
 }
 
 static void
@@ -1722,8 +1721,7 @@ l2_set_own_busy(struct FsmInst *fi, int event, void *arg)
                 enquiry_cr(l2, RNR, RSP, 0);
                 test_and_clear_bit(FLG_ACK_PEND, &l2->flag);
         }
-        if (skb)
-                dev_kfree_skb(skb);
+        dev_kfree_skb(skb);
 }
 
 static void
@@ -1736,8 +1734,7 @@ l2_clear_own_busy(struct FsmInst *fi, int event, void *arg)
                 enquiry_cr(l2, RR, RSP, 0);
                 test_and_clear_bit(FLG_ACK_PEND, &l2->flag);
         }
-        if (skb)
-                dev_kfree_skb(skb);
+        dev_kfree_skb(skb);
 }
 
 static void
diff --git a/drivers/isdn/mISDN/stack.c b/drivers/isdn/mISDN/stack.c
index fa2237e7bcf8..27aa32914425 100644
--- a/drivers/isdn/mISDN/stack.c
+++ b/drivers/isdn/mISDN/stack.c
@@ -75,8 +75,7 @@ send_socklist(struct mISDN_sock_list *sl, struct sk_buff *skb)
                         cskb = NULL;
         }
         read_unlock(&sl->lock);
-        if (cskb)
-                dev_kfree_skb(cskb);
+        dev_kfree_skb(cskb);
 }
 
 static void
@@ -134,8 +133,7 @@ send_layer2(struct mISDNstack *st, struct sk_buff *skb)
         }
 out:
         mutex_unlock(&st->lmutex);
-        if (skb)
-                dev_kfree_skb(skb);
+        dev_kfree_skb(skb);
 }
 
 static inline int
diff --git a/drivers/isdn/mISDN/tei.c b/drivers/isdn/mISDN/tei.c
index a4fa594e1caf..59d28cb19738 100644
--- a/drivers/isdn/mISDN/tei.c
+++ b/drivers/isdn/mISDN/tei.c
@@ -1328,10 +1328,8 @@ mgr_bcast(struct mISDNchannel *ch, struct sk_buff *skb)
         }
 out:
         read_unlock_irqrestore(&mgr->lock, flags);
-        if (cskb)
-                dev_kfree_skb(cskb);
-        if (skb)
-                dev_kfree_skb(skb);
+        dev_kfree_skb(cskb);
+        dev_kfree_skb(skb);
         return 0;
 }