Commit ebf8dc80 authored by Johannes Berg's avatar Johannes Berg Committed by Wey-Yi Guy
Browse files

iwlagn: prefer BSS context



If an interface type changes from a type that is
only supported on the PAN context (e.g. P2P GO)
to a type that is supported on the BSS context,
and the BSS context is not in use, then we need
to use the BSS context instead of changing the
device type within the context. To achieve this,
refuse the type change, which causes a down/up
cycle that will allocate the BSS context for the
interface.
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
Signed-off-by: default avatarWey-Yi Guy <wey-yi.w.guy@intel.com>
parent c914ac26
......@@ -1765,6 +1765,7 @@ int iwl_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
{
struct iwl_priv *priv = hw->priv;
struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
struct iwl_rxon_context *tmp;
u32 interface_modes;
int err;
......@@ -1789,6 +1790,19 @@ int iwl_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
goto out;
}
/*
* Refuse a change that should be done by moving from the PAN
* context to the BSS context instead, if the BSS context is
* available and can support the new interface type.
*/
if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
(bss_ctx->interface_modes & BIT(newtype) ||
bss_ctx->exclusive_interface_modes & BIT(newtype))) {
BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
err = -EBUSY;
goto out;
}
if (ctx->exclusive_interface_modes & BIT(newtype)) {
for_each_context(priv, tmp) {
if (ctx == tmp)
......
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