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wifi: iwlwifi: mvm: use wiphy locked debugfs for low-latency

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This will call into the OMI control path soon, and that will
require the wiphy mutex to be held. The files are removed by
mac80211 under wiphy mutex, so we must use the wiphy-locked
debugfs for them.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20241028135215.c62e23392400.Ifcb652d324bc60b7144fdf277d7989bede9e54d5@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2024-10-28 13:54:51 +02:00
parent dc40fde446
commit bf595b573e
1 changed files with 55 additions and 9 deletions
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64
drivers/net/wireless/intel/iwlwifi/mvm/debugfs-vif.c
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@ -463,11 +463,13 @@ static ssize_t iwl_dbgfs_os_device_timediff_read(struct file *file,
return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
}
static ssize_t iwl_dbgfs_low_latency_write(struct ieee80211_vif *vif, char *buf,
size_t count, loff_t *ppos)
static ssize_t
iwl_dbgfs_low_latency_write_handle(struct wiphy *wiphy, struct file *file,
char *buf, size_t count, void *data)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mvm *mvm = mvmvif->mvm;
struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
struct ieee80211_vif *vif = data;
u8 value;
int ret;
@ -484,12 +486,28 @@ static ssize_t iwl_dbgfs_low_latency_write(struct ieee80211_vif *vif, char *buf,
return count;
}
static ssize_t
iwl_dbgfs_low_latency_force_write(struct ieee80211_vif *vif, char *buf,
size_t count, loff_t *ppos)
static ssize_t iwl_dbgfs_low_latency_write(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ieee80211_vif *vif = file->private_data;
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mvm *mvm = mvmvif->mvm;
char buf[10] = {};
return wiphy_locked_debugfs_write(mvm->hw->wiphy, file,
buf, sizeof(buf), user_buf, count,
iwl_dbgfs_low_latency_write_handle,
vif);
}
static ssize_t
iwl_dbgfs_low_latency_force_write_handle(struct wiphy *wiphy, struct file *file,
char *buf, size_t count, void *data)
{
struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
struct ieee80211_vif *vif = data;
u8 value;
int ret;
@ -517,6 +535,22 @@ iwl_dbgfs_low_latency_force_write(struct ieee80211_vif *vif, char *buf,
return count;
}
static ssize_t
iwl_dbgfs_low_latency_force_write(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ieee80211_vif *vif = file->private_data;
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mvm *mvm = mvmvif->mvm;
char buf[10] = {};
return wiphy_locked_debugfs_write(mvm->hw->wiphy, file,
buf, sizeof(buf), user_buf, count,
iwl_dbgfs_low_latency_force_write_handle,
vif);
}
static ssize_t iwl_dbgfs_low_latency_read(struct file *file,
char __user *user_buf,
size_t count, loff_t *ppos)
@ -831,8 +865,20 @@ MVM_DEBUGFS_READ_FILE_OPS(mac_params);
MVM_DEBUGFS_READ_FILE_OPS(tx_pwr_lmt);
MVM_DEBUGFS_READ_WRITE_FILE_OPS(pm_params, 32);
MVM_DEBUGFS_READ_WRITE_FILE_OPS(bf_params, 256);
MVM_DEBUGFS_READ_WRITE_FILE_OPS(low_latency, 10);
MVM_DEBUGFS_WRITE_FILE_OPS(low_latency_force, 10);
static const struct file_operations iwl_dbgfs_low_latency_ops = {
.write = iwl_dbgfs_low_latency_write,
.read = iwl_dbgfs_low_latency_read,
.open = simple_open,
.llseek = generic_file_llseek,
};
static const struct file_operations iwl_dbgfs_low_latency_force_ops = {
.write = iwl_dbgfs_low_latency_force_write,
.open = simple_open,
.llseek = generic_file_llseek,
};
MVM_DEBUGFS_READ_WRITE_FILE_OPS(uapsd_misbehaving, 20);
MVM_DEBUGFS_READ_WRITE_FILE_OPS(rx_phyinfo, 10);
MVM_DEBUGFS_READ_WRITE_FILE_OPS(quota_min, 32);