hv_netvsc: Use bitmap_zalloc() when applicable

'send_section_map' is a bitmap. So use 'bitmap_zalloc()' to simplify code,
improve the semantic and avoid some open-coded arithmetic in allocator
arguments.

Also change the corresponding 'kfree()' into 'bitmap_free()' to keep
consistency.

While at it, change an '== NULL' test into a '!'.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c
index 396bc1c..5086cd0 100644 (file)
--- a/drivers/net/hyperv/netvsc.c
+++ b/drivers/net/hyperv/netvsc.c
@@ -155,7 +155,7 @@ static void free_netvsc_device(struct rcu_head *head)
        kfree(nvdev->extension);
        vfree(nvdev->recv_buf);
        vfree(nvdev->send_buf);
-       kfree(nvdev->send_section_map);
+       bitmap_free(nvdev->send_section_map);
 
        for (i = 0; i < VRSS_CHANNEL_MAX; i++) {
                xdp_rxq_info_unreg(&nvdev->chan_table[i].xdp_rxq);
@@ -336,7 +336,6 @@ static int netvsc_init_buf(struct hv_device *device,
        struct net_device *ndev = hv_get_drvdata(device);
        struct nvsp_message *init_packet;
        unsigned int buf_size;
-       size_t map_words;
        int i, ret = 0;
 
        /* Get receive buffer area. */
@@ -528,10 +527,9 @@ static int netvsc_init_buf(struct hv_device *device,
                   net_device->send_section_size, net_device->send_section_cnt);
 
        /* Setup state for managing the send buffer. */
-       map_words = DIV_ROUND_UP(net_device->send_section_cnt, BITS_PER_LONG);
-
-       net_device->send_section_map = kcalloc(map_words, sizeof(ulong), GFP_KERNEL);
-       if (net_device->send_section_map == NULL) {
+       net_device->send_section_map = bitmap_zalloc(net_device->send_section_cnt,
+                                                    GFP_KERNEL);
+       if (!net_device->send_section_map) {
                ret = -ENOMEM;
                goto cleanup;
        }