[S390] ctc: kmalloc->kzalloc/casting cleanups.

A patch for the CTC / ESCON network driver.  Switch from kmalloc to kzalloc
when appropriate, remove some unnecessary kmalloc casts too.  Since I have no
s390 machine, I didn't compile it but I examined it carefully.

Signed-off-by: "Ahmed S. Darwish" <darwish.07@gmail.com>
Cc: Frank Pavlic <fpavlic@de.ibm.com>
Cc: Ursula Braun <braunu@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/drivers/s390/net/ctcmain.c b/drivers/s390/net/ctcmain.c
index 0d6d5fc..570a960 100644 (file)
--- a/drivers/s390/net/ctcmain.c
+++ b/drivers/s390/net/ctcmain.c
@@ -1638,21 +1638,19 @@ add_channel(struct ccw_device *cdev, enum channel_types type)
        struct channel *ch;
 
        DBF_TEXT(trace, 2, __FUNCTION__);
-       if ((ch =
-            (struct channel *) kmalloc(sizeof (struct channel),
-                                       GFP_KERNEL)) == NULL) {
+       ch = kzalloc(sizeof(struct channel), GFP_KERNEL);
+       if (!ch) {
                ctc_pr_warn("ctc: Out of memory in add_channel\n");
                return -1;
        }
-       memset(ch, 0, sizeof (struct channel));
-       if ((ch->ccw = kmalloc(8*sizeof(struct ccw1),
-                                              GFP_KERNEL | GFP_DMA)) == NULL) {
+       /* assure all flags and counters are reset */
+       ch->ccw = kzalloc(8 * sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
+       if (!ch->ccw) {
                kfree(ch);
                ctc_pr_warn("ctc: Out of memory in add_channel\n");
                return -1;
        }
 
-       memset(ch->ccw, 0, 8*sizeof(struct ccw1));      // assure all flags and counters are reset
 
        /**
         * "static" ccws are used in the following way:
@@ -1692,15 +1690,14 @@ add_channel(struct ccw_device *cdev, enum channel_types type)
                return -1;
        }
        fsm_newstate(ch->fsm, CH_STATE_IDLE);
-       if ((ch->irb = kmalloc(sizeof (struct irb),
-                                             GFP_KERNEL)) == NULL) {
+       ch->irb = kzalloc(sizeof(struct irb), GFP_KERNEL);
+       if (!ch->irb) {
                ctc_pr_warn("ctc: Out of memory in add_channel\n");
                kfree_fsm(ch->fsm);
                kfree(ch->ccw);
                kfree(ch);
                return -1;
        }
-       memset(ch->irb, 0, sizeof (struct irb));
        while (*c && less_than((*c)->id, ch->id))
                c = &(*c)->next;
        if (*c && (!strncmp((*c)->id, ch->id, CTC_ID_SIZE))) {
@@ -2745,14 +2742,13 @@ ctc_probe_device(struct ccwgroup_device *cgdev)
        if (!get_device(&cgdev->dev))
                return -ENODEV;
 
-       priv = kmalloc(sizeof (struct ctc_priv), GFP_KERNEL);
+       priv = kzalloc(sizeof(struct ctc_priv), GFP_KERNEL);
        if (!priv) {
                ctc_pr_err("%s: Out of memory\n", __func__);
                put_device(&cgdev->dev);
                return -ENOMEM;
        }
 
-       memset(priv, 0, sizeof (struct ctc_priv));
        rc = ctc_add_files(&cgdev->dev);
        if (rc) {
                kfree(priv);
@@ -2793,10 +2789,9 @@ ctc_init_netdevice(struct net_device * dev, int alloc_device,
        DBF_TEXT(setup, 3, __FUNCTION__);
 
        if (alloc_device) {
-               dev = kmalloc(sizeof (struct net_device), GFP_KERNEL);
+               dev = kzalloc(sizeof(struct net_device), GFP_KERNEL);
                if (!dev)
                        return NULL;
-               memset(dev, 0, sizeof (struct net_device));
        }
 
        dev->priv = privptr;