[PATCH] kfree cleanup: drivers/char

This is the drivers/char/ part of the big kfree cleanup patch.

Remove pointless checks for NULL prior to calling kfree() in drivers/char/.
Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/char/consolemap.c

@@ -345,14 +345,12 @@ static void con_release_unimap(struct uni_pagedir *p)
 	for (i = 0; i < 32; i++) {
 		if ((p1 = p->uni_pgdir[i]) != NULL) {
 			for (j = 0; j < 32; j++)
-				if (p1[j])
 				kfree(p1[j]);
 			kfree(p1);
 		}
 		p->uni_pgdir[i] = NULL;
 	}
-	for (i = 0; i < 4; i++)
-		if (p->inverse_translations[i]) {
+	for (i = 0; i < 4; i++) {
 		kfree(p->inverse_translations[i]);
 		p->inverse_translations[i] = NULL;
 	}

drivers/char/drm/ffb_context.c

@@ -526,10 +526,8 @@ int ffb_driver_rmctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	if (idx < 0 || idx >= FFB_MAX_CTXS)
 		return -EINVAL;
 
-	if (fpriv->hw_state[idx] != NULL) {
 	kfree(fpriv->hw_state[idx]);
 	fpriv->hw_state[idx] = NULL;
-	}
 	return 0;
 }
 

drivers/char/drm/ffb_drv.c

@@ -245,13 +245,11 @@ static void ffb_driver_release(drm_device_t * dev, struct file *filp)
 
 static void ffb_driver_pretakedown(drm_device_t * dev)
 {
-	if (dev->dev_private)
 	kfree(dev->dev_private);
 }
 
 static int ffb_driver_postcleanup(drm_device_t * dev)
 {
-	if (ffb_position != NULL)
 	kfree(ffb_position);
 	return 0;
 }

drivers/char/ip2/i2ellis.c

@@ -106,9 +106,7 @@ iiEllisInit(void)
 static void
 iiEllisCleanup(void)
 {
-	if ( pDelayTimer != NULL ) {
-		kfree ( pDelayTimer );
-	}
+	kfree(pDelayTimer);
 }
 
 //******************************************************************************

drivers/char/istallion.c

@@ -860,9 +860,8 @@ static void __exit istallion_module_exit(void)
 	if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
 		printk("STALLION: failed to un-register serial memory device, "
 			"errno=%d\n", -i);
-	if (stli_tmpwritebuf != (char *) NULL)
+
 	kfree(stli_tmpwritebuf);
-	if (stli_txcookbuf != (char *) NULL)
 	kfree(stli_txcookbuf);
 
 	for (i = 0; (i < stli_nrbrds); i++) {

drivers/char/n_hdlc.c

@@ -264,7 +264,6 @@ static void n_hdlc_release(struct n_hdlc *n_hdlc)
 		} else
 			break;
 	}
-	if (n_hdlc->tbuf)
 	kfree(n_hdlc->tbuf);
 	kfree(n_hdlc);
 	

drivers/char/pcmcia/synclink_cs.c

@@ -2994,7 +2994,6 @@ int rx_alloc_buffers(MGSLPC_INFO *info)
 
 void rx_free_buffers(MGSLPC_INFO *info)
 {
-	if (info->rx_buf)
 	kfree(info->rx_buf);
 	info->rx_buf = NULL;
 }

drivers/char/rocket.c

@@ -2512,10 +2512,8 @@ static void rp_cleanup_module(void)
 		       "rocketport driver\n", -retval);
 	put_tty_driver(rocket_driver);
 
-	for (i = 0; i < MAX_RP_PORTS; i++) {
-		if (rp_table[i])
+	for (i = 0; i < MAX_RP_PORTS; i++)
 		kfree(rp_table[i]);
-	}
 
 	for (i = 0; i < NUM_BOARDS; i++) {
 		if (rcktpt_io_addr[i] <= 0 || is_PCI[i])

drivers/char/selection.c

@@ -246,7 +246,6 @@ int set_selection(const struct tiocl_selection __user *sel, struct tty_struct *t
 		clear_selection();
 		return -ENOMEM;
 	}
-	if (sel_buffer)
 	kfree(sel_buffer);
 	sel_buffer = bp;
 

drivers/char/stallion.c

@@ -785,7 +785,6 @@ static void __exit stallion_module_exit(void)
 			"errno=%d\n", -i);
 	class_destroy(stallion_class);
 
-	if (stl_tmpwritebuf != (char *) NULL)
 	kfree(stl_tmpwritebuf);
 
 	for (i = 0; (i < stl_nrbrds); i++) {
@@ -804,7 +803,6 @@ static void __exit stallion_module_exit(void)
 					continue;
 				if (portp->tty != (struct tty_struct *) NULL)
 					stl_hangup(portp->tty);
-				if (portp->tx.buf != (char *) NULL)
 				kfree(portp->tx.buf);
 				kfree(portp);
 			}

drivers/char/synclink.c

@@ -4016,9 +4016,7 @@ static int mgsl_alloc_intermediate_rxbuffer_memory(struct mgsl_struct *info)
  */
 static void mgsl_free_intermediate_rxbuffer_memory(struct mgsl_struct *info)
 {
-	if ( info->intermediate_rxbuffer )
 	kfree(info->intermediate_rxbuffer);
-
 	info->intermediate_rxbuffer = NULL;
 
 }	/* end of mgsl_free_intermediate_rxbuffer_memory() */
@@ -4072,10 +4070,8 @@ static void mgsl_free_intermediate_txbuffer_memory(struct mgsl_struct *info)
 	int i;
 
 	for ( i=0; i<info->num_tx_holding_buffers; ++i ) {
-		if ( info->tx_holding_buffers[i].buffer ) {
 		kfree(info->tx_holding_buffers[i].buffer);
-				info->tx_holding_buffers[i].buffer=NULL;
-		}
+		info->tx_holding_buffers[i].buffer = NULL;
 	}
 
 	info->get_tx_holding_index = 0;

drivers/char/synclinkmp.c

@@ -2788,10 +2788,8 @@ static void shutdown(SLMP_INFO * info)
 	del_timer(&info->tx_timer);
 	del_timer(&info->status_timer);
 
-	if (info->tx_buf) {
 	kfree(info->tx_buf);
 	info->tx_buf = NULL;
-	}
 
 	spin_lock_irqsave(&info->lock,flags);
 
@@ -3611,7 +3609,6 @@ int alloc_tmp_rx_buf(SLMP_INFO *info)
 
 void free_tmp_rx_buf(SLMP_INFO *info)
 {
-	if (info->tmp_rx_buf)
 	kfree(info->tmp_rx_buf);
 	info->tmp_rx_buf = NULL;
 }

drivers/char/tty_io.c

@@ -1416,13 +1416,10 @@ static int init_dev(struct tty_driver *driver, int idx,
 
 	/* Release locally allocated memory ... nothing placed in slots */
 free_mem_out:
-	if (o_tp)
 	kfree(o_tp);
 	if (o_tty)
 		free_tty_struct(o_tty);
-	if (ltp)
 	kfree(ltp);
-	if (tp)
 	kfree(tp);
 	free_tty_struct(tty);