iwlegacy: do not use interruptible waits

iwlegacy version of fix:

commit effd4d9aece9184f526e6556786a94d335e38b71
Author: Johannes Berg <johannes.berg@intel.com>
Date:   Thu Sep 15 11:46:52 2011 -0700

    iwlagn: do not use interruptible waits

    Since the dawn of its time, iwlwifi has used
    interruptible waits to wait for synchronous
    commands and firmware loading.

    This leads to "interesting" bugs, because it
    can't actually handle the interruptions; for
    example when a command sending is interrupted
    it will assume the command completed fully,
    and then leave it pending, which leads to all
    kinds of trouble when the command finishes
    later.

    Since there's no easy way to gracefully deal
    with interruptions, fix the driver to not use
    interruptible waits.

    This at least fixes the error
    iwlagn 0000:02:00.0: Error: Response NULL in  'REPLY_SCAN_ABORT_CMD'

    I have seen in P2P testing, but it is likely
    that there are other errors caused by this.

Cc: stable@kernel.org # 2.6.39+
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/iwlegacy/iwl-core.c b/drivers/net/wireless/iwlegacy/iwl-core.c
index 35cd2537e7fd2cf13bdf8ff185498b108beaee7f..e5971fe9d169bf1573a0e716520136218316a0bf 100644 (file)
--- a/drivers/net/wireless/iwlegacy/iwl-core.c
+++ b/drivers/net/wireless/iwlegacy/iwl-core.c
@@ -937,7 +937,7 @@ void iwl_legacy_irq_handle_error(struct iwl_priv *priv)
                                        &priv->contexts[IWL_RXON_CTX_BSS]);
 #endif
 
-       wake_up_interruptible(&priv->wait_command_queue);
+       wake_up(&priv->wait_command_queue);
 
        /* Keep the restart process from trying to send host
         * commands by clearing the INIT status bit */
@@ -1746,7 +1746,7 @@ int iwl_legacy_force_reset(struct iwl_priv *priv, bool external)
 
        /* Set the FW error flag -- cleared on iwl_down */
        set_bit(STATUS_FW_ERROR, &priv->status);
-       wake_up_interruptible(&priv->wait_command_queue);
+       wake_up(&priv->wait_command_queue);
        /*
         * Keep the restart process from trying to send host
         * commands by clearing the INIT status bit

diff --git a/drivers/net/wireless/iwlegacy/iwl-hcmd.c b/drivers/net/wireless/iwlegacy/iwl-hcmd.c
index 62b4b09122cbac4489561a0a1428cc70d7a5b538..ce1fc9feb61f68487d3bc2f043d9feefa4fc8b72 100644 (file)
--- a/drivers/net/wireless/iwlegacy/iwl-hcmd.c
+++ b/drivers/net/wireless/iwlegacy/iwl-hcmd.c
@@ -167,7 +167,7 @@ int iwl_legacy_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
                goto out;
        }
 
-       ret = wait_event_interruptible_timeout(priv->wait_command_queue,
+       ret = wait_event_timeout(priv->wait_command_queue,
                        !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
                        HOST_COMPLETE_TIMEOUT);
        if (!ret) {

diff --git a/drivers/net/wireless/iwlegacy/iwl-tx.c b/drivers/net/wireless/iwlegacy/iwl-tx.c
index 4b4489f746a0bdb882cea46e385265f635794102..ef9e268bf8a074ea3707b04992e758f52dc0eb8d 100644 (file)
--- a/drivers/net/wireless/iwlegacy/iwl-tx.c
+++ b/drivers/net/wireless/iwlegacy/iwl-tx.c
@@ -647,7 +647,7 @@ iwl_legacy_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
                clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
                IWL_DEBUG_INFO(priv, "Clearing HCMD_ACTIVE for command %s\n",
                               iwl_legacy_get_cmd_string(cmd->hdr.cmd));
-               wake_up_interruptible(&priv->wait_command_queue);
+               wake_up(&priv->wait_command_queue);
        }
 
        /* Mark as unmapped */

diff --git a/drivers/net/wireless/iwlegacy/iwl3945-base.c b/drivers/net/wireless/iwlegacy/iwl3945-base.c
index 795826a014eda976eaa5a619dbe0a70b7a8a9b3f..66ee15629a76454f849639fc2f5f29aadf6c47f4 100644 (file)
--- a/drivers/net/wireless/iwlegacy/iwl3945-base.c
+++ b/drivers/net/wireless/iwlegacy/iwl3945-base.c
@@ -841,7 +841,7 @@ static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
                wiphy_rfkill_set_hw_state(priv->hw->wiphy,
                                test_bit(STATUS_RF_KILL_HW, &priv->status));
        else
-               wake_up_interruptible(&priv->wait_command_queue);
+               wake_up(&priv->wait_command_queue);
 }
 
 /**
@@ -2269,7 +2269,7 @@ static void iwl3945_alive_start(struct iwl_priv *priv)
        iwl3945_reg_txpower_periodic(priv);
 
        IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
-       wake_up_interruptible(&priv->wait_command_queue);
+       wake_up(&priv->wait_command_queue);
 
        return;
 
@@ -2300,7 +2300,7 @@ static void __iwl3945_down(struct iwl_priv *priv)
        iwl_legacy_clear_driver_stations(priv);
 
        /* Unblock any waiting calls */
-       wake_up_interruptible_all(&priv->wait_command_queue);
+       wake_up_all(&priv->wait_command_queue);
 
        /* Wipe out the EXIT_PENDING status bit if we are not actually
         * exiting the module */
@@ -2853,7 +2853,7 @@ static int iwl3945_mac_start(struct ieee80211_hw *hw)
 
        /* Wait for START_ALIVE from ucode. Otherwise callbacks from
         * mac80211 will not be run successfully. */
-       ret = wait_event_interruptible_timeout(priv->wait_command_queue,
+       ret = wait_event_timeout(priv->wait_command_queue,
                        test_bit(STATUS_READY, &priv->status),
                        UCODE_READY_TIMEOUT);
        if (!ret) {

diff --git a/drivers/net/wireless/iwlegacy/iwl4965-base.c b/drivers/net/wireless/iwlegacy/iwl4965-base.c
index 14334668034e0b5f01bce281e896df9742cd59fe..aa0c2539761e7538d57e2aba645f58b32edd0ec6 100644 (file)
--- a/drivers/net/wireless/iwlegacy/iwl4965-base.c
+++ b/drivers/net/wireless/iwlegacy/iwl4965-base.c
@@ -576,7 +576,7 @@ static void iwl4965_rx_card_state_notif(struct iwl_priv *priv,
                wiphy_rfkill_set_hw_state(priv->hw->wiphy,
                        test_bit(STATUS_RF_KILL_HW, &priv->status));
        else
-               wake_up_interruptible(&priv->wait_command_queue);
+               wake_up(&priv->wait_command_queue);
 }
 
 /**
@@ -926,7 +926,7 @@ static void iwl4965_irq_tasklet(struct iwl_priv *priv)
                handled |= CSR_INT_BIT_FH_TX;
                /* Wake up uCode load routine, now that load is complete */
                priv->ucode_write_complete = 1;
-               wake_up_interruptible(&priv->wait_command_queue);
+               wake_up(&priv->wait_command_queue);
        }
 
        if (inta & ~handled) {
@@ -1795,7 +1795,7 @@ static void iwl4965_alive_start(struct iwl_priv *priv)
        iwl4965_rf_kill_ct_config(priv);
 
        IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
-       wake_up_interruptible(&priv->wait_command_queue);
+       wake_up(&priv->wait_command_queue);
 
        iwl_legacy_power_update_mode(priv, true);
        IWL_DEBUG_INFO(priv, "Updated power mode\n");
@@ -1828,7 +1828,7 @@ static void __iwl4965_down(struct iwl_priv *priv)
        iwl_legacy_clear_driver_stations(priv);
 
        /* Unblock any waiting calls */
-       wake_up_interruptible_all(&priv->wait_command_queue);
+       wake_up_all(&priv->wait_command_queue);
 
        /* Wipe out the EXIT_PENDING status bit if we are not actually
         * exiting the module */
@@ -2266,7 +2266,7 @@ int iwl4965_mac_start(struct ieee80211_hw *hw)
 
        /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
         * mac80211 will not be run successfully. */
-       ret = wait_event_interruptible_timeout(priv->wait_command_queue,
+       ret = wait_event_timeout(priv->wait_command_queue,
                        test_bit(STATUS_READY, &priv->status),
                        UCODE_READY_TIMEOUT);
        if (!ret) {