diff options
| author | Christian Lamparter <chunkeey@googlemail.com> | 2011-02-24 14:12:20 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-02-25 15:32:33 -0500 |
| commit | 3083e83c86e604ac7005c100b7d7242389407ba5 (patch) | |
| tree | eda332de50da769ea0d4fddec5530a6c6edf0c21 /drivers/net/wireless/p54/fwio.c | |
| parent | 41cae2d01385af4199666db57274c0df3283b065 (diff) | |
| download | blackbird-obmc-linux-3083e83c86e604ac7005c100b7d7242389407ba5.tar.gz blackbird-obmc-linux-3083e83c86e604ac7005c100b7d7242389407ba5.zip | |
p54: implement set_coverage_class
The callback sets slot time as specified in IEEE 802.11-2007
section 17.3.8.6 and raises round trip delay accordingly.
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/p54/fwio.c')
| -rw-r--r-- | drivers/net/wireless/p54/fwio.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/net/wireless/p54/fwio.c b/drivers/net/wireless/p54/fwio.c index 0d3d108f6fe2..2fab7d20ffc2 100644 --- a/drivers/net/wireless/p54/fwio.c +++ b/drivers/net/wireless/p54/fwio.c @@ -559,6 +559,7 @@ int p54_set_edcf(struct p54_common *priv) { struct sk_buff *skb; struct p54_edcf *edcf; + u8 rtd; skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*edcf), P54_CONTROL_TYPE_DCFINIT, GFP_ATOMIC); @@ -575,9 +576,15 @@ int p54_set_edcf(struct p54_common *priv) edcf->sifs = 0x0a; edcf->eofpad = 0x06; } + /* + * calculate the extra round trip delay according to the + * formula from 802.11-2007 17.3.8.6. + */ + rtd = 3 * priv->coverage_class; + edcf->slottime += rtd; + edcf->round_trip_delay = cpu_to_le16(rtd); /* (see prism54/isl_oid.h for further details) */ edcf->frameburst = cpu_to_le16(0); - edcf->round_trip_delay = cpu_to_le16(0); edcf->flags = 0; memset(edcf->mapping, 0, sizeof(edcf->mapping)); memcpy(edcf->queue, priv->qos_params, sizeof(edcf->queue)); |
