e1000: Use kcalloc()

Replace kmalloc+memsetout the driver. Slightly modified by Auke Kok.

Signed-off-by: Yan Burman <burman.yan@gmail.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

2 files changed, 24 insertions, 31 deletions

diff --git a/drivers/net/e1000/e1000_ethtool.c b/drivers/net/e1000/e1000_ethtool.c
index a094288f0277..2881da1c6fe3 100644
--- a/drivers/net/e1000/e1000_ethtool.c
+++ b/drivers/net/e1000/e1000_ethtool.c
@@ -654,14 +654,11 @@ e1000_set_ringparam(struct net_device *netdev,
         e1000_mac_type mac_type = adapter->hw.mac_type;
         struct e1000_tx_ring *txdr, *tx_old;
         struct e1000_rx_ring *rxdr, *rx_old;
-        int i, err, tx_ring_size, rx_ring_size;
+        int i, err;
 
         if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
                 return -EINVAL;
 
-        tx_ring_size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
-        rx_ring_size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
-
         while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
                 msleep(1);
 
@@ -672,11 +669,11 @@ e1000_set_ringparam(struct net_device *netdev,
         rx_old = adapter->rx_ring;
 
         err = -ENOMEM;
-        txdr = kzalloc(tx_ring_size, GFP_KERNEL);
+        txdr = kcalloc(adapter->num_tx_queues, sizeof(struct e1000_tx_ring), GFP_KERNEL);
         if (!txdr)
                 goto err_alloc_tx;
 
-        rxdr = kzalloc(rx_ring_size, GFP_KERNEL);
+        rxdr = kcalloc(adapter->num_rx_queues, sizeof(struct e1000_rx_ring), GFP_KERNEL);
         if (!rxdr)
                 goto err_alloc_rx;
 
@@ -1053,23 +1050,24 @@ e1000_setup_desc_rings(struct e1000_adapter *adapter)
         struct e1000_rx_ring *rxdr = &adapter->test_rx_ring;
         struct pci_dev *pdev = adapter->pdev;
         uint32_t rctl;
-        int size, i, ret_val;
+        int i, ret_val;
 
         /* Setup Tx descriptor ring and Tx buffers */
 
         if (!txdr->count)
                 txdr->count = E1000_DEFAULT_TXD;
 
-        size = txdr->count * sizeof(struct e1000_buffer);
-        if (!(txdr->buffer_info = kmalloc(size, GFP_KERNEL))) {
+        if (!(txdr->buffer_info = kcalloc(txdr->count,
+                                          sizeof(struct e1000_buffer),
+                                          GFP_KERNEL))) {
                 ret_val = 1;
                 goto err_nomem;
         }
-        memset(txdr->buffer_info, 0, size);
 
         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
         E1000_ROUNDUP(txdr->size, 4096);
-        if (!(txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma))) {
+        if (!(txdr->desc = pci_alloc_consistent(pdev, txdr->size,
+                                                &txdr->dma))) {
                 ret_val = 2;
                 goto err_nomem;
         }
@@ -1116,12 +1114,12 @@ e1000_setup_desc_rings(struct e1000_adapter *adapter)
         if (!rxdr->count)
                 rxdr->count = E1000_DEFAULT_RXD;
 
-        size = rxdr->count * sizeof(struct e1000_buffer);
-        if (!(rxdr->buffer_info = kmalloc(size, GFP_KERNEL))) {
+        if (!(rxdr->buffer_info = kcalloc(rxdr->count,
+                                          sizeof(struct e1000_buffer),
+                                          GFP_KERNEL))) {
                 ret_val = 4;
                 goto err_nomem;
         }
-        memset(rxdr->buffer_info, 0, size);
 
         rxdr->size = rxdr->count * sizeof(struct e1000_rx_desc);
         if (!(rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma))) {
diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index ed638d676fcf..7b124840bbcc 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -1354,31 +1354,27 @@ e1000_sw_init(struct e1000_adapter *adapter)
 static int __devinit
 e1000_alloc_queues(struct e1000_adapter *adapter)
 {
-        int size;
-
-        size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
-        adapter->tx_ring = kmalloc(size, GFP_KERNEL);
+        adapter->tx_ring = kcalloc(adapter->num_tx_queues,
+                                   sizeof(struct e1000_tx_ring), GFP_KERNEL);
         if (!adapter->tx_ring)
                 return -ENOMEM;
-        memset(adapter->tx_ring, 0, size);
 
-        size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
-        adapter->rx_ring = kmalloc(size, GFP_KERNEL);
+        adapter->rx_ring = kcalloc(adapter->num_rx_queues,
+                                   sizeof(struct e1000_rx_ring), GFP_KERNEL);
         if (!adapter->rx_ring) {
                 kfree(adapter->tx_ring);
                 return -ENOMEM;
         }
-        memset(adapter->rx_ring, 0, size);
 
 #ifdef CONFIG_E1000_NAPI
-        size = sizeof(struct net_device) * adapter->num_rx_queues;
-        adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
+        adapter->polling_netdev = kcalloc(adapter->num_rx_queues,
+                                          sizeof(struct net_device),
+                                          GFP_KERNEL);
         if (!adapter->polling_netdev) {
                 kfree(adapter->tx_ring);
                 kfree(adapter->rx_ring);
                 return -ENOMEM;
         }
-        memset(adapter->polling_netdev, 0, size);
 #endif
 
         return E1000_SUCCESS;
@@ -1774,18 +1770,18 @@ e1000_setup_rx_resources(struct e1000_adapter *adapter,
         }
         memset(rxdr->buffer_info, 0, size);
 
-        size = sizeof(struct e1000_ps_page) * rxdr->count;
-        rxdr->ps_page = kmalloc(size, GFP_KERNEL);
+        rxdr->ps_page = kcalloc(rxdr->count, sizeof(struct e1000_ps_page),
+                                GFP_KERNEL);
         if (!rxdr->ps_page) {
                 vfree(rxdr->buffer_info);
                 DPRINTK(PROBE, ERR,
                 "Unable to allocate memory for the receive descriptor ring\n");
                 return -ENOMEM;
         }
-        memset(rxdr->ps_page, 0, size);
 
-        size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
-        rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
+        rxdr->ps_page_dma = kcalloc(rxdr->count,
+                                    sizeof(struct e1000_ps_page_dma),
+                                    GFP_KERNEL);
         if (!rxdr->ps_page_dma) {
                 vfree(rxdr->buffer_info);
                 kfree(rxdr->ps_page);
@@ -1793,7 +1789,6 @@ e1000_setup_rx_resources(struct e1000_adapter *adapter,
                 "Unable to allocate memory for the receive descriptor ring\n");
                 return -ENOMEM;
         }
-        memset(rxdr->ps_page_dma, 0, size);
 
         if (adapter->hw.mac_type <= e1000_82547_rev_2)
                 desc_len = sizeof(struct e1000_rx_desc);