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zd1211rw: beacon config error checking 

Add some error checking to the new beacon configuration code.

Signed-off-by: Daniel Drake <dsd@gentoo.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Daniel Drake 2008-07-04 04:30:49 +01:00 committed by John W. Linville
parent 6ef307bc56
commit f2cae6c5e4
1 changed files with 45 additions and 17 deletions
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62
drivers/net/wireless/zd1211rw/zd_mac.c
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@ -405,43 +405,66 @@ static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs,
/* FIXME: Management frame? */
}
void zd_mac_config_beacon(struct ieee80211_hw *hw, struct sk_buff *beacon)
static int zd_mac_config_beacon(struct ieee80211_hw *hw, struct sk_buff *beacon)
{
struct zd_mac *mac = zd_hw_mac(hw);
int r;
u32 tmp, j = 0;
/* 4 more bytes for tail CRC */
u32 full_len = beacon->len + 4;
zd_iowrite32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, 0);
zd_ioread32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, &tmp);
r = zd_iowrite32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, 0);
if (r < 0)
return r;
r = zd_ioread32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, &tmp);
if (r < 0)
return r;
while (tmp & 0x2) {
zd_ioread32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, &tmp);
r = zd_ioread32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, &tmp);
if (r < 0)
return r;
if ((++j % 100) == 0) {
printk(KERN_ERR "CR_BCN_FIFO_SEMAPHORE not ready\n");
if (j >= 500) {
printk(KERN_ERR "Giving up beacon config.\n");
return;
return -ETIMEDOUT;
}
}
msleep(1);
}
zd_iowrite32(&mac->chip, CR_BCN_FIFO, full_len - 1);
if (zd_chip_is_zd1211b(&mac->chip))
zd_iowrite32(&mac->chip, CR_BCN_LENGTH, full_len - 1);
r = zd_iowrite32(&mac->chip, CR_BCN_FIFO, full_len - 1);
if (r < 0)
return r;
if (zd_chip_is_zd1211b(&mac->chip)) {
r = zd_iowrite32(&mac->chip, CR_BCN_LENGTH, full_len - 1);
if (r < 0)
return r;
}
for (j = 0 ; j < beacon->len; j++)
zd_iowrite32(&mac->chip, CR_BCN_FIFO,
for (j = 0 ; j < beacon->len; j++) {
r = zd_iowrite32(&mac->chip, CR_BCN_FIFO,
*((u8 *)(beacon->data + j)));
if (r < 0)
return r;
}
for (j = 0; j < 4; j++)
zd_iowrite32(&mac->chip, CR_BCN_FIFO, 0x0);
for (j = 0; j < 4; j++) {
r = zd_iowrite32(&mac->chip, CR_BCN_FIFO, 0x0);
if (r < 0)
return r;
}
r = zd_iowrite32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, 1);
if (r < 0)
return r;
zd_iowrite32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, 1);
/* 802.11b/g 2.4G CCK 1Mb
* 802.11a, not yet implemented, uses different values (see GPL vendor
* driver)
*/
zd_iowrite32(&mac->chip, CR_BCN_PLCP_CFG, 0x00000400 |
return zd_iowrite32(&mac->chip, CR_BCN_PLCP_CFG, 0x00000400 |
(full_len << 19));
}
@ -699,15 +722,20 @@ static int zd_op_config_interface(struct ieee80211_hw *hw,
{
struct zd_mac *mac = zd_hw_mac(hw);
int associated;
int r;
if (mac->type == IEEE80211_IF_TYPE_MESH_POINT ||
mac->type == IEEE80211_IF_TYPE_IBSS) {
associated = true;
if (conf->beacon) {
zd_mac_config_beacon(hw, conf->beacon);
kfree_skb(conf->beacon);
zd_set_beacon_interval(&mac->chip, BCN_MODE_IBSS |
r = zd_mac_config_beacon(hw, conf->beacon);
if (r < 0)
return r;
r = zd_set_beacon_interval(&mac->chip, BCN_MODE_IBSS |
hw->conf.beacon_int);
if (r < 0)
return r;
kfree_skb(conf->beacon);
}
} else
associated = is_valid_ether_addr(conf->bssid);