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Commit 06354665 authored by Wen Gong's avatar Wen Gong Committed by Johannes Berg
Browse files

mac80211: allow drivers to set max MTU 



Make it possibly for drivers to adjust the default max_mtu
by storing it in the hardware struct and using that value
for all interfaces.

Signed-off-by: default avatarWen Gong <wgong@codeaurora.org>
Link: https://lore.kernel.org/r/1567738137-31748-1-git-send-email-wgong@codeaurora.org


Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 24f6d765

include/net/mac80211.h

+3 −0
Original line number Diff line number Diff line
@@ -2463,6 +2463,8 @@ enum ieee80211_hw_flags { 
 *

 * @weight_multiplier: Driver specific airtime weight multiplier used while

 *	refilling deficit of each TXQ.

 *

 * @max_mtu: the max mtu could be set.

 */

struct ieee80211_hw {

	struct ieee80211_conf conf;
@@ -2500,6 +2502,7 @@ struct ieee80211_hw { 
	u8 max_nan_de_entries;

	u8 tx_sk_pacing_shift;

	u8 weight_multiplier;

	u32 max_mtu;

};



static inline bool _ieee80211_hw_check(struct ieee80211_hw *hw,

net/mac80211/iface.c

+1 −1
Original line number Diff line number Diff line
@@ -1876,7 +1876,7 @@ int ieee80211_if_add(struct ieee80211_local *local, const char *name, 


		/* MTU range: 256 - 2304 */

		ndev->min_mtu = 256;

		ndev->max_mtu = IEEE80211_MAX_DATA_LEN;

		ndev->max_mtu = local->hw.max_mtu;



		ret = register_netdevice(ndev);

		if (ret) {

net/mac80211/main.c

+1 −0
Original line number Diff line number Diff line
@@ -639,6 +639,7 @@ struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 
					 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;

	local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;

	local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;

	local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;

	local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;

	wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;

	wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;