[PATCH] kfree cleanup: drivers/s390

This is the drivers/s390/ part of the big kfree cleanup patch.

Remove pointless checks for NULL prior to calling kfree() in drivers/s390/.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Acked-by: Cornelia Huck <cohuck@de.ibm.com>
Acked-by: Stefan Bader <Stefan.Bader@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

16 files changed, 44 insertions, 86 deletions

diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 8fc891a..7008d32 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -115,8 +115,7 @@ dasd_alloc_device(void)
 void
 dasd_free_device(struct dasd_device *device)
 {
-	if (device->private)
-		kfree(device->private);
+	kfree(device->private);
 	free_page((unsigned long) device->erp_mem);
 	free_pages((unsigned long) device->ccw_mem, 1);
 	kfree(device);
@@ -539,8 +538,7 @@ dasd_kmalloc_request(char *magic, int cplength, int datasize,
 	if (datasize > 0) {
 		cqr->data = kmalloc(datasize, GFP_ATOMIC | GFP_DMA);
 		if (cqr->data == NULL) {
-			if (cqr->cpaddr != NULL)
-				kfree(cqr->cpaddr);
+			kfree(cqr->cpaddr);
 			kfree(cqr);
 			return ERR_PTR(-ENOMEM);
 		}
@@ -615,10 +613,8 @@ dasd_kfree_request(struct dasd_ccw_req * cqr, struct dasd_device * device)
 		clear_normalized_cda(ccw);
 	} while (ccw++->flags & (CCW_FLAG_CC | CCW_FLAG_DC));
 #endif
-	if (cqr->cpaddr != NULL)
-		kfree(cqr->cpaddr);
-	if (cqr->data != NULL)
-		kfree(cqr->data);
+	kfree(cqr->cpaddr);
+	kfree(cqr->data);
 	kfree(cqr);
 	dasd_put_device(device);
 }
diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c
index bda896d..caee16a 100644
--- a/drivers/s390/block/dasd_devmap.c
+++ b/drivers/s390/block/dasd_devmap.c
@@ -387,8 +387,7 @@ dasd_add_busid(char *bus_id, int features)
 		new = 0;
 	}
 	spin_unlock(&dasd_devmap_lock);
-	if (new)
-		kfree(new);
+	kfree(new);
 	return devmap;
 }
 
diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c
index f11a67f..75419cf 100644
--- a/drivers/s390/char/con3215.c
+++ b/drivers/s390/char/con3215.c
@@ -727,8 +727,7 @@ raw3215_remove (struct ccw_device *cdev)
 	raw = cdev->dev.driver_data;
 	if (raw) {
 		cdev->dev.driver_data = NULL;
-		if (raw->buffer)
-			kfree(raw->buffer);
+		kfree(raw->buffer);
 		kfree(raw);
 	}
 }
diff --git a/drivers/s390/char/keyboard.c b/drivers/s390/char/keyboard.c
index fd43d99..5bda234 100644
--- a/drivers/s390/char/keyboard.c
+++ b/drivers/s390/char/keyboard.c
@@ -99,13 +99,11 @@ out_fn_handler:
 	kfree(kbd->fn_handler);
 out_func:
 	for (i = 0; i < ARRAY_SIZE(func_table); i++)
-		if (kbd->func_table[i])
-			kfree(kbd->func_table[i]);
+		kfree(kbd->func_table[i]);
 	kfree(kbd->func_table);
 out_maps:
 	for (i = 0; i < ARRAY_SIZE(key_maps); i++)
-		if (kbd->key_maps[i])
-			kfree(kbd->key_maps[i]);
+		kfree(kbd->key_maps[i]);
 	kfree(kbd->key_maps);
 out_kbd:
 	kfree(kbd);
@@ -121,12 +119,10 @@ kbd_free(struct kbd_data *kbd)
 	kfree(kbd->accent_table);
 	kfree(kbd->fn_handler);
 	for (i = 0; i < ARRAY_SIZE(func_table); i++)
-		if (kbd->func_table[i])
-			kfree(kbd->func_table[i]);
+		kfree(kbd->func_table[i]);
 	kfree(kbd->func_table);
 	for (i = 0; i < ARRAY_SIZE(key_maps); i++)
-		if (kbd->key_maps[i])
-			kfree(kbd->key_maps[i]);
+		kfree(kbd->key_maps[i]);
 	kfree(kbd->key_maps);
 	kfree(kbd);
 }
@@ -452,8 +448,7 @@ do_kdgkb_ioctl(struct kbd_data *kbd, struct kbsentry __user *u_kbs,
 			return -EFAULT;
 		}
 		p[len] = 0;
-		if (kbd->func_table[kb_func])
-			kfree(kbd->func_table[kb_func]);
+		kfree(kbd->func_table[kb_func]);
 		kbd->func_table[kb_func] = p;
 		break;
 	}
diff --git a/drivers/s390/char/raw3270.c b/drivers/s390/char/raw3270.c
index d669464..f5b7d36 100644
--- a/drivers/s390/char/raw3270.c
+++ b/drivers/s390/char/raw3270.c
@@ -183,8 +183,7 @@ raw3270_request_alloc_bootmem(size_t size)
 void
 raw3270_request_free (struct raw3270_request *rq)
 {
-	if (rq->buffer)
-		kfree(rq->buffer);
+	kfree(rq->buffer);
 	kfree(rq);
 }
 
diff --git a/drivers/s390/char/tape_core.c b/drivers/s390/char/tape_core.c
index 6c52e83..8f486e1 100644
--- a/drivers/s390/char/tape_core.c
+++ b/drivers/s390/char/tape_core.c
@@ -682,8 +682,7 @@ tape_alloc_request(int cplength, int datasize)
 		request->cpdata = kmalloc(datasize, GFP_KERNEL | GFP_DMA);
 		if (request->cpdata == NULL) {
 			DBF_EXCEPTION(1, "cqra nomem\n");
-			if (request->cpaddr != NULL)
-				kfree(request->cpaddr);
+			kfree(request->cpaddr);
 			kfree(request);
 			return ERR_PTR(-ENOMEM);
 		}
@@ -706,10 +705,8 @@ tape_free_request (struct tape_request * request)
 	if (request->device != NULL) {
 		request->device = tape_put_device(request->device);
 	}
-	if (request->cpdata != NULL)
-		kfree(request->cpdata);
-	if (request->cpaddr != NULL)
-		kfree(request->cpaddr);
+	kfree(request->cpdata);
+	kfree(request->cpaddr);
 	kfree(request);
 }
 
diff --git a/drivers/s390/cio/cmf.c b/drivers/s390/cio/cmf.c
index c05b069..b978f7f 100644
--- a/drivers/s390/cio/cmf.c
+++ b/drivers/s390/cio/cmf.c
@@ -642,8 +642,7 @@ static void
 free_cmbe (struct ccw_device *cdev)
 {
 	spin_lock_irq(cdev->ccwlock);
-	if (cdev->private->cmb)
-		kfree(cdev->private->cmb);
+	kfree(cdev->private->cmb);
 	cdev->private->cmb = NULL;
 	spin_unlock_irq(cdev->ccwlock);
 
diff --git a/drivers/s390/cio/device_ops.c b/drivers/s390/cio/device_ops.c
index ad3fe5a..85a3026 100644
--- a/drivers/s390/cio/device_ops.c
+++ b/drivers/s390/cio/device_ops.c
@@ -550,10 +550,8 @@ ccw_device_stlck(struct ccw_device *cdev)
 	/* Clear irb. */
 	memset(&cdev->private->irb, 0, sizeof(struct irb));
 out_unlock:
-	if (buf)
-		kfree(buf);
-	if (buf2)
-		kfree(buf2);
+	kfree(buf);
+	kfree(buf2);
 	spin_unlock_irqrestore(&sch->lock, flags);
 	return ret;
 }
diff --git a/drivers/s390/cio/qdio.c b/drivers/s390/cio/qdio.c
index ef5cd07..eb39218 100644
--- a/drivers/s390/cio/qdio.c
+++ b/drivers/s390/cio/qdio.c
@@ -1338,16 +1338,14 @@ qdio_release_irq_memory(struct qdio_irq *irq_ptr)
 		if (!irq_ptr->input_qs[i])
 			goto next;
 
-		if (irq_ptr->input_qs[i]->slib)
-			kfree(irq_ptr->input_qs[i]->slib);
+		kfree(irq_ptr->input_qs[i]->slib);
 		kfree(irq_ptr->input_qs[i]);
 
 next:
 		if (!irq_ptr->output_qs[i])
 			continue;
 
-		if (irq_ptr->output_qs[i]->slib)
-			kfree(irq_ptr->output_qs[i]->slib);
+		kfree(irq_ptr->output_qs[i]->slib);
 		kfree(irq_ptr->output_qs[i]);
 
 	}
@@ -3315,8 +3313,7 @@ qdio_get_qdio_memory(void)
 static void
 qdio_release_qdio_memory(void)
 {
-	if (indicators)
-		kfree(indicators);
+	kfree(indicators);
 }
 
 static void
diff --git a/drivers/s390/crypto/z90main.c b/drivers/s390/crypto/z90main.c
index 0cb47ec..04c2ef7 100644
--- a/drivers/s390/crypto/z90main.c
+++ b/drivers/s390/crypto/z90main.c
@@ -3051,8 +3051,7 @@ destroy_crypto_device(int index)
 	if (dev_ptr) {
 		disabledFlag = dev_ptr->disabled;
 		t = dev_ptr->dev_type;
-		if (dev_ptr->dev_resp_p)
-			kfree(dev_ptr->dev_resp_p);
+		kfree(dev_ptr->dev_resp_p);
 		kfree(dev_ptr);
 	} else {
 		disabledFlag = 0;
@@ -3080,11 +3079,11 @@ static void
 destroy_z90crypt(void)
 {
 	int i;
+
 	for (i = 0; i < z90crypt.max_count; i++)
 		if (z90crypt.device_p[i])
 			destroy_crypto_device(i);
-	if (z90crypt.hdware_info)
-		kfree((void *)z90crypt.hdware_info);
+	kfree(z90crypt.hdware_info);
 	memset((void *)&z90crypt, 0, sizeof(z90crypt));
 }
 
diff --git a/drivers/s390/net/claw.c b/drivers/s390/net/claw.c
index 3092473..1a1c3de 100644
--- a/drivers/s390/net/claw.c
+++ b/drivers/s390/net/claw.c
@@ -2743,14 +2743,10 @@ probe_error( struct ccwgroup_device *cgdev)
 #endif
         privptr=(struct claw_privbk *)cgdev->dev.driver_data;
 	if (privptr!=NULL) {
-		if (privptr->p_env != NULL) {
-			kfree(privptr->p_env);
-			privptr->p_env=NULL;
-		}
-        	if (privptr->p_mtc_envelope!=NULL) {
-                	kfree(privptr->p_mtc_envelope);
-                	privptr->p_mtc_envelope=NULL;
-        	}
+		kfree(privptr->p_env);
+		privptr->p_env=NULL;
+                kfree(privptr->p_mtc_envelope);
+               	privptr->p_mtc_envelope=NULL;
                 kfree(privptr);
                 privptr=NULL;
         }
@@ -4121,22 +4117,14 @@ claw_remove_device(struct ccwgroup_device *cgdev)
 	if (cgdev->state == CCWGROUP_ONLINE)
 		claw_shutdown_device(cgdev);
 	claw_remove_files(&cgdev->dev);
-	if (priv->p_mtc_envelope!=NULL) {
-                kfree(priv->p_mtc_envelope);
-                priv->p_mtc_envelope=NULL;
-        }
-	if (priv->p_env != NULL) {
-		kfree(priv->p_env);
-		priv->p_env=NULL;
-	}
-	if (priv->channel[0].irb != NULL) {
-		kfree(priv->channel[0].irb);
-		priv->channel[0].irb=NULL;
-	}
-	if (priv->channel[1].irb != NULL) {
-		kfree(priv->channel[1].irb);
-		priv->channel[1].irb=NULL;
-	}
+	kfree(priv->p_mtc_envelope);
+	priv->p_mtc_envelope=NULL;
+	kfree(priv->p_env);
+	priv->p_env=NULL;
+	kfree(priv->channel[0].irb);
+	priv->channel[0].irb=NULL;
+	kfree(priv->channel[1].irb);
+	priv->channel[1].irb=NULL;
 	kfree(priv);
 	cgdev->dev.driver_data=NULL;
 	cgdev->cdev[READ]->dev.driver_data = NULL;
diff --git a/drivers/s390/net/fsm.c b/drivers/s390/net/fsm.c
index 38f50b7..24029bd 100644
--- a/drivers/s390/net/fsm.c
+++ b/drivers/s390/net/fsm.c
@@ -78,8 +78,7 @@ kfree_fsm(fsm_instance *this)
 {
 	if (this) {
 		if (this->f) {
-			if (this->f->jumpmatrix)
-				kfree(this->f->jumpmatrix);
+			kfree(this->f->jumpmatrix);
 			kfree(this->f);
 		}
 		kfree(this);
diff --git a/drivers/s390/net/iucv.c b/drivers/s390/net/iucv.c
index e08e74e..df7647c 100644
--- a/drivers/s390/net/iucv.c
+++ b/drivers/s390/net/iucv.c
@@ -447,14 +447,10 @@ static void
 iucv_exit(void)
 {
 	iucv_retrieve_buffer();
-      	if (iucv_external_int_buffer) {
-		kfree(iucv_external_int_buffer);
-		iucv_external_int_buffer = NULL;
-	}
-	if (iucv_param_pool) {
-		kfree(iucv_param_pool);
-		iucv_param_pool = NULL;
-	}
+	kfree(iucv_external_int_buffer);
+	iucv_external_int_buffer = NULL;
+	kfree(iucv_param_pool);
+	iucv_param_pool = NULL;
 	s390_root_dev_unregister(iucv_root);
 	bus_unregister(&iucv_bus);
 	printk(KERN_INFO "IUCV lowlevel driver unloaded\n");
diff --git a/drivers/s390/net/lcs.c b/drivers/s390/net/lcs.c
index 46f34ba..1c8ad2f 100644
--- a/drivers/s390/net/lcs.c
+++ b/drivers/s390/net/lcs.c
@@ -145,8 +145,7 @@ lcs_free_channel(struct lcs_channel *channel)
 
 	LCS_DBF_TEXT(2, setup, "ichfree");
 	for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
-		if (channel->iob[cnt].data != NULL)
-			kfree(channel->iob[cnt].data);
+		kfree(channel->iob[cnt].data);
 		channel->iob[cnt].data = NULL;
 	}
 }
diff --git a/drivers/s390/net/qeth_eddp.c b/drivers/s390/net/qeth_eddp.c
index f94f1f25..011915d 100644
--- a/drivers/s390/net/qeth_eddp.c
+++ b/drivers/s390/net/qeth_eddp.c
@@ -62,8 +62,7 @@ qeth_eddp_free_context(struct qeth_eddp_context *ctx)
 	for (i = 0; i < ctx->num_pages; ++i)
 		free_page((unsigned long)ctx->pages[i]);
 	kfree(ctx->pages);
-	if (ctx->elements != NULL)
-		kfree(ctx->elements);
+	kfree(ctx->elements);
 	kfree(ctx);
 }
 
diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c
index cab0985..c218b5c 100644
--- a/drivers/s390/scsi/zfcp_aux.c
+++ b/drivers/s390/scsi/zfcp_aux.c
@@ -450,8 +450,7 @@ zfcp_cfdc_dev_ioctl(struct file *file, unsigned int command,
 		kfree(sg_list);
 	}
 
-	if (sense_data != NULL)
-		kfree(sense_data);
+	kfree(sense_data);
 
 	return retval;
 }