From 4233df6b748193d45f79fb7448991a473061a65d Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Mon, 13 Oct 2008 13:35:05 +0200 Subject: [PATCH] ath9k/mac80211: disallow fragmentation in ath9k, report to userspace As I've reported, ath9k currently fails utterly when fragmentation is enabled. This makes ath9k "support" hardware fragmentation by not supporting fragmentation at all to avoid the double-free issue. The patch also changes mac80211 to report errors from the driver operation to userspace. That hack in ath9k should be removed once the rate control algorithm it has is fixed, and we can at that time consider removing the hw fragmentation support entirely since it's not used by any driver. Signed-off-by: Johannes Berg Cc: stable@kernel.org Acked-by: Luis R. Rodriguez Signed-off-by: John W. Linville --- drivers/net/wireless/ath9k/main.c | 8 +++++++- net/mac80211/wext.c | 2 +- 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c index 74726990d59e..f05f584ab7bc 100644 --- a/drivers/net/wireless/ath9k/main.c +++ b/drivers/net/wireless/ath9k/main.c @@ -1640,6 +1640,11 @@ static int ath9k_ampdu_action(struct ieee80211_hw *hw, return ret; } +static int ath9k_no_fragmentation(struct ieee80211_hw *hw, u32 value) +{ + return -EOPNOTSUPP; +} + static struct ieee80211_ops ath9k_ops = { .tx = ath9k_tx, .start = ath9k_start, @@ -1664,7 +1669,8 @@ static struct ieee80211_ops ath9k_ops = { .get_tsf = ath9k_get_tsf, .reset_tsf = ath9k_reset_tsf, .tx_last_beacon = NULL, - .ampdu_action = ath9k_ampdu_action + .ampdu_action = ath9k_ampdu_action, + .set_frag_threshold = ath9k_no_fragmentation, }; static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) diff --git a/net/mac80211/wext.c b/net/mac80211/wext.c index 7e0d53abde24..742f811ca416 100644 --- a/net/mac80211/wext.c +++ b/net/mac80211/wext.c @@ -775,7 +775,7 @@ static int ieee80211_ioctl_siwfrag(struct net_device *dev, * configure it here */ if (local->ops->set_frag_threshold) - local->ops->set_frag_threshold( + return local->ops->set_frag_threshold( local_to_hw(local), local->fragmentation_threshold); -- 2.20.1