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rndis_wlan: preallocate command buffer for set/get_oid 

Reduce amount of kmalloc/kfree calls in set/get_oid by preallocating command
buffer.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Jussi Kivilinna 2008-06-12 20:19:19 +03:00 committed by John W. Linville
parent bb8649d429
commit 90d07349f8
1 changed files with 33 additions and 14 deletions
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47
drivers/net/wireless/rndis_wlan.c
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@ -314,6 +314,8 @@ enum wpa_key_mgmt { KEY_MGMT_802_1X, KEY_MGMT_PSK, KEY_MGMT_NONE,
#define WORK_LINK_DOWN (1<<1)
#define WORK_SET_MULTICAST_LIST (1<<2)
#define COMMAND_BUFFER_SIZE (CONTROL_BUFFER_SIZE + sizeof(struct rndis_set))
/* RNDIS device private data */
struct rndis_wext_private {
char name[32];
@ -362,6 +364,8 @@ struct rndis_wext_private {
u8 *wpa_ie;
int wpa_cipher_pair;
int wpa_cipher_group;
u8 command_buffer[COMMAND_BUFFER_SIZE];
};
@ -428,18 +432,23 @@ static int rndis_query_oid(struct usbnet *dev, __le32 oid, void *data, int *len)
buflen = *len + sizeof(*u.get);
if (buflen < CONTROL_BUFFER_SIZE)
buflen = CONTROL_BUFFER_SIZE;
u.buf = kmalloc(buflen, GFP_KERNEL);
if (!u.buf)
return -ENOMEM;
if (buflen > COMMAND_BUFFER_SIZE) {
u.buf = kmalloc(buflen, GFP_KERNEL);
if (!u.buf)
return -ENOMEM;
} else {
u.buf = priv->command_buffer;
}
mutex_lock(&priv->command_lock);
memset(u.get, 0, sizeof *u.get);
u.get->msg_type = RNDIS_MSG_QUERY;
u.get->msg_len = ccpu2(sizeof *u.get);
u.get->oid = oid;
mutex_lock(&priv->command_lock);
ret = rndis_command(dev, u.header);
mutex_unlock(&priv->command_lock);
if (ret == 0) {
ret = le32_to_cpu(u.get_c->len);
*len = (*len > ret) ? ret : *len;
@ -447,7 +456,10 @@ static int rndis_query_oid(struct usbnet *dev, __le32 oid, void *data, int *len)
ret = rndis_error_status(u.get_c->status);
}
kfree(u.buf);
mutex_unlock(&priv->command_lock);
if (u.buf != priv->command_buffer)
kfree(u.buf);
return ret;
}
@ -466,9 +478,16 @@ static int rndis_set_oid(struct usbnet *dev, __le32 oid, void *data, int len)
buflen = len + sizeof(*u.set);
if (buflen < CONTROL_BUFFER_SIZE)
buflen = CONTROL_BUFFER_SIZE;
u.buf = kmalloc(buflen, GFP_KERNEL);
if (!u.buf)
return -ENOMEM;
if (buflen > COMMAND_BUFFER_SIZE) {
u.buf = kmalloc(buflen, GFP_KERNEL);
if (!u.buf)
return -ENOMEM;
} else {
u.buf = priv->command_buffer;
}
mutex_lock(&priv->command_lock);
memset(u.set, 0, sizeof *u.set);
u.set->msg_type = RNDIS_MSG_SET;
@ -479,14 +498,14 @@ static int rndis_set_oid(struct usbnet *dev, __le32 oid, void *data, int len)
u.set->handle = ccpu2(0);
memcpy(u.buf + sizeof(*u.set), data, len);
mutex_lock(&priv->command_lock);
ret = rndis_command(dev, u.header);
mutex_unlock(&priv->command_lock);
if (ret == 0)
ret = rndis_error_status(u.set_c->status);
kfree(u.buf);
mutex_unlock(&priv->command_lock);
if (u.buf != priv->command_buffer)
kfree(u.buf);
return ret;
}