From: Emmanuel Grumbach <egrumbach@gmail.com>
To: linux-wireless@vger.kernel.org
Cc: Andrei Otcheretianski <andrei.otcheretianski@intel.com>,
Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Subject: [PATCH 32/40] iwlwifi: mvm: Protect mvm->csa_vif with RCU
Date: Sun, 6 Jul 2014 12:36:08 +0300 [thread overview]
Message-ID: <1404639376-3792-32-git-send-email-egrumbach@gmail.com> (raw)
In-Reply-To: <53B917DC.5050902@gmail.com>
From: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Currently mvm->csa_vif is protected with mvm mutex. The RCU protection
is required for "iwlwifi: mvm: Reflect GO channel switch in NoA" patch.
Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
---
drivers/net/wireless/iwlwifi/mvm/mac-ctxt.c | 15 +++++++++------
drivers/net/wireless/iwlwifi/mvm/mac80211.c | 12 ++++++++++--
drivers/net/wireless/iwlwifi/mvm/mvm.h | 2 +-
3 files changed, 20 insertions(+), 9 deletions(-)
diff --git a/drivers/net/wireless/iwlwifi/mvm/mac-ctxt.c b/drivers/net/wireless/iwlwifi/mvm/mac-ctxt.c
index 6d09472..19bd696 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mac-ctxt.c
+++ b/drivers/net/wireless/iwlwifi/mvm/mac-ctxt.c
@@ -1206,6 +1206,7 @@ int iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm,
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_mvm_tx_resp *beacon_notify_hdr;
+ struct ieee80211_vif *csa_vif;
u64 tsf;
lockdep_assert_held(&mvm->mutex);
@@ -1231,13 +1232,15 @@ int iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm,
mvm->ap_last_beacon_gp2,
le32_to_cpu(beacon_notify_hdr->initial_rate));
- if (unlikely(mvm->csa_vif && mvm->csa_vif->csa_active)) {
- if (!ieee80211_csa_is_complete(mvm->csa_vif)) {
- ieee80211_csa_update_counter(mvm->csa_vif);
- iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm->csa_vif);
+ csa_vif = rcu_dereference_protected(mvm->csa_vif,
+ lockdep_is_held(&mvm->mutex));
+ if (unlikely(csa_vif && csa_vif->csa_active)) {
+ if (!ieee80211_csa_is_complete(csa_vif)) {
+ ieee80211_csa_update_counter(csa_vif);
+ iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif);
} else {
- ieee80211_csa_finish(mvm->csa_vif);
- mvm->csa_vif = NULL;
+ ieee80211_csa_finish(csa_vif);
+ RCU_INIT_POINTER(mvm->csa_vif, NULL);
}
}
diff --git a/drivers/net/wireless/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
index 78a78c0..984a1e7 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
@@ -1607,6 +1607,10 @@ static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
mutex_lock(&mvm->mutex);
+ /* Handle AP stop while in CSA */
+ if (rcu_access_pointer(mvm->csa_vif) == vif)
+ RCU_INIT_POINTER(mvm->csa_vif, NULL);
+
mvmvif->ap_ibss_active = false;
mvm->ap_last_beacon_gp2 = 0;
@@ -2664,15 +2668,19 @@ static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
struct cfg80211_chan_def *chandef)
{
struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
+ struct ieee80211_vif *csa_vif;
mutex_lock(&mvm->mutex);
- if (WARN(mvm->csa_vif && mvm->csa_vif->csa_active,
+
+ csa_vif = rcu_dereference_protected(mvm->csa_vif,
+ lockdep_is_held(&mvm->mutex));
+ if (WARN(csa_vif && csa_vif->csa_active,
"Another CSA is already in progress"))
goto out_unlock;
IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
chandef->center_freq1);
- mvm->csa_vif = vif;
+ rcu_assign_pointer(mvm->csa_vif, vif);
out_unlock:
mutex_unlock(&mvm->mutex);
diff --git a/drivers/net/wireless/iwlwifi/mvm/mvm.h b/drivers/net/wireless/iwlwifi/mvm/mvm.h
index fa8fcbc..5bb42af 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/iwlwifi/mvm/mvm.h
@@ -658,7 +658,7 @@ struct iwl_mvm {
/* Indicate if device power save is allowed */
bool ps_disabled;
- struct ieee80211_vif *csa_vif;
+ struct ieee80211_vif __rcu *csa_vif;
/* system time of last beacon (for AP/GO interface) */
u32 ap_last_beacon_gp2;
--
1.8.3.2
next prev parent reply other threads:[~2014-07-06 9:37 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-06 9:33 pull request: iwlwifi-next 2014-07-06 Emmanuel Grumbach
2014-07-06 9:35 ` [PATCH 01/40] iwlwifi: fix naming mistake for the fw_monitor module parameter Emmanuel Grumbach
2014-07-06 9:35 ` [PATCH 02/40] iwlwifi: remove wrong comment about alignment in iwl-fw-error-dump.h Emmanuel Grumbach
2014-07-06 9:35 ` [PATCH 03/40] iwlwifi: mvm: don't collect logs in the interrupt thread Emmanuel Grumbach
2014-07-06 9:35 ` [PATCH 04/40] iwlwifi: mvm: kill iwl_mvm_fw_error_rxf_dump Emmanuel Grumbach
2014-07-06 9:35 ` [PATCH 05/40] iwlwifi: mvm: update layout of firmware error dump Emmanuel Grumbach
2014-07-06 9:35 ` [PATCH 06/40] iwlwifi: mvm: wait for d0i3 exit in add interface flow Emmanuel Grumbach
2014-07-06 9:35 ` [PATCH 07/40] iwlwifi: mvm: read the mac address in family 8000 Emmanuel Grumbach
2014-07-06 9:35 ` [PATCH 08/40] iwlwifi: rename iwl_fw_error_fw_mon to iwl_fw_error_dump_fw_mon Emmanuel Grumbach
2014-07-06 9:35 ` [PATCH 09/40] iwlwifi: mvm: remove unused flags from TX command Emmanuel Grumbach
2014-07-06 9:35 ` [PATCH 10/40] iwlwifi: mvm: BT Coex - prepare towards new API Emmanuel Grumbach
2014-07-06 9:35 ` [PATCH 11/40] iwlwifi: mvm: BT Coex - " Emmanuel Grumbach
2014-07-06 9:35 ` [PATCH 12/40] iwlwifi: mvm: BT Coex - convert the sw boost update to " Emmanuel Grumbach
2014-07-06 9:35 ` [PATCH 13/40] iwlwifi: mvm: BT Coex - convert the co-running " Emmanuel Grumbach
2014-07-06 9:35 ` [PATCH 14/40] iwlwifi: mvm: BT Coex - convert reduced Tx power " Emmanuel Grumbach
2014-07-06 9:35 ` [PATCH 15/40] iwlwifi: mvm: BT Coex - add High Band retention Emmanuel Grumbach
2014-07-06 9:35 ` [PATCH 16/40] iwlwifi: mvm: BT Coex - fix debugfs with old API Emmanuel Grumbach
2014-07-06 9:35 ` [PATCH 17/40] iwlwifi: mvm: warn about empty OTP Emmanuel Grumbach
2014-07-06 9:35 ` [PATCH 18/40] iwlwifi: mvm: rs: don't clear persistent fields Emmanuel Grumbach
2014-07-06 9:35 ` [PATCH 19/40] iwlwifi: mvm: rs: don't save debugfs files Emmanuel Grumbach
2014-07-06 9:35 ` [PATCH 20/40] iwlwifi: mvm: add unified LMAC scan API Emmanuel Grumbach
2014-07-06 9:35 ` [PATCH 21/40] iwlwifi: mvm: init lmac scan command Emmanuel Grumbach
2014-07-06 9:35 ` [PATCH 22/40] iwlwifi: mvm: fix endianity in " Emmanuel Grumbach
2014-07-06 9:35 ` [PATCH 23/40] iwlwifi: 8000: drop a print when the address is invalid Emmanuel Grumbach
2014-07-06 9:36 ` [PATCH 24/40] iwlwifi: mvm: let iwl_mvm_update_quotas disregard a disabled vif Emmanuel Grumbach
2014-07-06 9:36 ` [PATCH 25/40] iwlwifi: mvm: don't send zero quota to the firmware Emmanuel Grumbach
2014-07-06 9:36 ` [PATCH 26/40] iwlwifi: mvm: validate that we don't send zero quota Emmanuel Grumbach
2014-07-06 9:36 ` [PATCH 27/40] iwlwifi: mvm: don't pass update type to quota iterator Emmanuel Grumbach
2014-07-06 9:36 ` [PATCH 28/40] iwlwifi: mvm: remove update type argument from quota update Emmanuel Grumbach
2014-07-06 9:36 ` [PATCH 29/40] iwlwifi: mvm: add switch_vif_chanctx operation Emmanuel Grumbach
2014-07-06 9:36 ` [PATCH 30/40] iwlwifi: mvm: CSA unbind-bind flow support for client Emmanuel Grumbach
2014-07-06 9:36 ` [PATCH 31/40] iwlwifi: mvm: Use beacon_get_template instead of beacon_get Emmanuel Grumbach
2014-07-06 9:36 ` Emmanuel Grumbach [this message]
2014-07-06 9:36 ` [PATCH 33/40] iwlwifi: mvm: Reflect GO channel switch in NoA Emmanuel Grumbach
2014-07-06 9:36 ` [PATCH 34/40] iwlwifi: mvm: Use CS tx block bit for AP/GO Emmanuel Grumbach
2014-07-06 9:36 ` [PATCH 35/40] iwlwifi: mvm: disallow new TDLS stations when appropriate Emmanuel Grumbach
2014-07-06 9:36 ` [PATCH 36/40] iwlwifi: mvm: protect TDLS discovery session Emmanuel Grumbach
2014-07-06 9:36 ` [PATCH 37/40] iwlwifi: disable PSM on vifs with associated TDLS peers Emmanuel Grumbach
2014-07-06 9:36 ` [PATCH 38/40] iwlwifi: mvm: teardown TDLS peers when initiating DCM Emmanuel Grumbach
2014-07-06 9:36 ` [PATCH 39/40] iwlwifi: mvm: remove 8000 HW family setting of adc sampling on nic config Emmanuel Grumbach
2014-07-06 9:36 ` [PATCH 40/40] iwlwifi: mvm: minor fix in comment Emmanuel Grumbach
2014-07-07 18:44 ` pull request: iwlwifi-next 2014-07-06 Emmanuel Grumbach
2014-07-07 20:08 ` John W. Linville
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1404639376-3792-32-git-send-email-egrumbach@gmail.com \
--to=egrumbach@gmail.com \
--cc=andrei.otcheretianski@intel.com \
--cc=emmanuel.grumbach@intel.com \
--cc=linux-wireless@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).