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Date: Wed, 28 Sep 2011 15:03:24 -0700
From: Greg KH <gregkh@...e.de>
To: linux-kernel@...r.kernel.org, stable@...nel.org
Cc: stable-review@...nel.org, torvalds@...ux-foundation.org,
akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
Stanislaw Gruszka <sgruszka@...hat.com>,
"John W. Linville" <linville@...driver.com>
Subject: [240/244] iwlegacy: do not use interruptible waits
3.0-stable review patch. If anyone has any objections, please let us know.
------------------
From: Stanislaw Gruszka <sgruszka@...hat.com>
commit 65d0f19e583e80e42b1c67c166bfc4dfdf6ab693 upstream.
iwlegacy version of fix:
commit effd4d9aece9184f526e6556786a94d335e38b71
Author: Johannes Berg <johannes.berg@...el.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@...hat.com>
Signed-off-by: John W. Linville <linville@...driver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
drivers/net/wireless/iwlegacy/iwl-core.c | 4 ++--
drivers/net/wireless/iwlegacy/iwl-hcmd.c | 2 +-
drivers/net/wireless/iwlegacy/iwl-tx.c | 2 +-
drivers/net/wireless/iwlegacy/iwl3945-base.c | 8 ++++----
drivers/net/wireless/iwlegacy/iwl4965-base.c | 10 +++++-----
5 files changed, 13 insertions(+), 13 deletions(-)
--- 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
&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_pr
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
--- 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_
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) {
--- 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_pr
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 */
--- 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(
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 i
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_pr
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 ieee
/* 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) {
--- 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(
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 i
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 i
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_pr
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_h
/* 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) {
--
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