iwlegacy: do not use interruptible waits

commit 65d0f19e583e80e42b1c67c166bfc4dfdf6ab693 upstream.

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.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/net/wireless/iwlegacy/iwl-core.c b/drivers/net/wireless/iwlegacy/iwl-core.c
index 3be76bd5499a960f5e7685953a18074c44504525..d273d507e0ce0552a399134db19937ec00ae86df 100644 (file)
--- a/drivers/net/wireless/iwlegacy/iwl-core.c
+++ b/drivers/net/wireless/iwlegacy/iwl-core.c
@@ -938,7 +938,7 @@ 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 */
@@ -1776,7 +1776,7 @@ int iwl_legacy_force_reset(struct iwl_priv *priv, int mode, bool external)
                IWL_ERR(priv, "On demand firmware reload\n");
                /* 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 0ee6be6a9c5db74c4b8b603e8b5e705641393d8f..421d5c8b8e3fe23e848a39fa2cc40be8c1f22bee 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);
 }
 
 /**
@@ -2518,7 +2518,7 @@ 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;
 
@@ -2549,7 +2549,7 @@ 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 */
@@ -3125,7 +3125,7 @@ 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 7157ba52968033642953a3af849d4cd706b1694c..0c37c025400b5b0e3f49374b12284e9aa3e0b293 100644 (file)
--- a/drivers/net/wireless/iwlegacy/iwl4965-base.c
+++ b/drivers/net/wireless/iwlegacy/iwl4965-base.c
@@ -704,7 +704,7 @@ 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);
 }
 
 /**
@@ -1054,7 +1054,7 @@ 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) {
@@ -2126,7 +2126,7 @@ 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");
@@ -2159,7 +2159,7 @@ 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 */
@@ -2597,7 +2597,7 @@ 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) {