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airo: simplify WEP index and capability checks 

Do the computation once at init time; don't ask the hardware
every time.

Signed-off-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Dan Williams 2009-01-24 09:11:35 -05:00 committed by John W. Linville
parent f65b56d67b
commit 138c0c6882
1 changed files with 27 additions and 32 deletions
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59
drivers/net/wireless/airo.c
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@ -1233,6 +1233,9 @@ struct airo_info {
#define PCI_SHARED_LEN 2*MPI_MAX_FIDS*PKTSIZE+RIDSIZE
char proc_name[IFNAMSIZ];
int wep_capable;
int max_wep_idx;
/* WPA-related stuff */
unsigned int bssListFirst;
unsigned int bssListNext;
@ -2836,6 +2839,9 @@ static struct net_device *_init_airo_card( unsigned short irq, int port,
rc = -EIO;
goto err_out_wifi;
}
/* WEP capability discovery */
ai->wep_capable = (cap_rid.softCap & cpu_to_le16(0x02)) ? 1 : 0;
ai->max_wep_idx = (cap_rid.softCap & cpu_to_le16(0x80)) ? 3 : 0;
airo_print_info(dev->name, "Firmware version %x.%x.%02x",
((le16_to_cpu(cap_rid.softVer) >> 8) & 0xF),
@ -6265,11 +6271,9 @@ static int airo_get_mode(struct net_device *dev,
return 0;
}
static inline int valid_index(CapabilityRid *p, int index)
static inline int valid_index(struct airo_info *ai, int index)
{
if (index < 0)
return 0;
return index < (p->softCap & cpu_to_le16(0x80) ? 4 : 1);
return (index >= 0) && (index <= ai->max_wep_idx);
}
/*------------------------------------------------------------------*/
@ -6282,16 +6286,12 @@ static int airo_set_encode(struct net_device *dev,
char *extra)
{
struct airo_info *local = dev->ml_priv;
CapabilityRid cap_rid; /* Card capability info */
int perm = ( dwrq->flags & IW_ENCODE_TEMP ? 0 : 1 );
__le16 currentAuthType = local->config.authType;
/* Is WEP supported ? */
readCapabilityRid(local, &cap_rid, 1);
/* Older firmware doesn't support this...
if(!(cap_rid.softCap & cpu_to_le16(2))) {
if (!local->wep_capable)
return -EOPNOTSUPP;
} */
readConfigRid(local, 1);
/* Basic checking: do we have a key to set ?
@ -6304,13 +6304,16 @@ static int airo_set_encode(struct net_device *dev,
wep_key_t key;
int index = (dwrq->flags & IW_ENCODE_INDEX) - 1;
int current_index = get_wep_key(local, 0xffff);
/* Check the size of the key */
if (dwrq->length > MAX_KEY_SIZE) {
return -EINVAL;
}
/* Check the index (none -> use current) */
if (!valid_index(&cap_rid, index))
if (!valid_index(local, index))
index = current_index;
/* Set the length */
if (dwrq->length > MIN_KEY_SIZE)
key.len = MAX_KEY_SIZE;
@ -6339,12 +6342,13 @@ static int airo_set_encode(struct net_device *dev,
} else {
/* Do we want to just set the transmit key index ? */
int index = (dwrq->flags & IW_ENCODE_INDEX) - 1;
if (valid_index(&cap_rid, index)) {
if (valid_index(local, index))
set_wep_key(local, index, NULL, 0, perm, 1);
} else
else {
/* Don't complain if only change the mode */
if (!(dwrq->flags & IW_ENCODE_MODE))
return -EINVAL;
}
}
/* Read the flags */
if(dwrq->flags & IW_ENCODE_DISABLED)
@ -6370,14 +6374,12 @@ static int airo_get_encode(struct net_device *dev,
{
struct airo_info *local = dev->ml_priv;
int index = (dwrq->flags & IW_ENCODE_INDEX) - 1;
CapabilityRid cap_rid; /* Card capability info */
/* Is it supported ? */
readCapabilityRid(local, &cap_rid, 1);
if(!(cap_rid.softCap & cpu_to_le16(2))) {
if (!local->wep_capable)
return -EOPNOTSUPP;
}
readConfigRid(local, 1);
/* Check encryption mode */
switch(local->config.authType) {
case AUTH_ENCRYPT:
@ -6396,7 +6398,7 @@ static int airo_get_encode(struct net_device *dev,
memset(extra, 0, 16);
/* Which key do we want ? -1 -> tx index */
if (!valid_index(&cap_rid, index))
if (!valid_index(local, index))
index = get_wep_key(local, 0xffff);
dwrq->flags |= index + 1;
/* Copy the key to the user buffer */
@ -6419,24 +6421,20 @@ static int airo_set_encodeext(struct net_device *dev,
struct airo_info *local = dev->ml_priv;
struct iw_point *encoding = &wrqu->encoding;
struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
CapabilityRid cap_rid; /* Card capability info */
int perm = ( encoding->flags & IW_ENCODE_TEMP ? 0 : 1 );
__le16 currentAuthType = local->config.authType;
int idx, key_len, alg = ext->alg, set_key = 1;
wep_key_t key;
/* Is WEP supported ? */
readCapabilityRid(local, &cap_rid, 1);
/* Older firmware doesn't support this...
if(!(cap_rid.softCap & cpu_to_le16(2))) {
if (!local->wep_capable)
return -EOPNOTSUPP;
} */
readConfigRid(local, 1);
/* Determine and validate the key index */
idx = encoding->flags & IW_ENCODE_INDEX;
if (idx) {
if (!valid_index(&cap_rid, idx - 1))
if (!valid_index(local, idx - 1))
return -EINVAL;
idx--;
} else
@ -6505,14 +6503,11 @@ static int airo_get_encodeext(struct net_device *dev,
struct airo_info *local = dev->ml_priv;
struct iw_point *encoding = &wrqu->encoding;
struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
CapabilityRid cap_rid; /* Card capability info */
int idx, max_key_len;
/* Is it supported ? */
readCapabilityRid(local, &cap_rid, 1);
if(!(cap_rid.softCap & cpu_to_le16(2))) {
if (!local->wep_capable)
return -EOPNOTSUPP;
}
readConfigRid(local, 1);
max_key_len = encoding->length - sizeof(*ext);
@ -6521,7 +6516,7 @@ static int airo_get_encodeext(struct net_device *dev,
idx = encoding->flags & IW_ENCODE_INDEX;
if (idx) {
if (!valid_index(&cap_rid, idx - 1))
if (!valid_index(local, idx - 1))
return -EINVAL;
idx--;
} else