* [PATCH] iwlwifi: fix possible priv->mutex deadlock during suspend
@ 2007-12-19 5:59 Zhu Yi
0 siblings, 0 replies; 3+ messages in thread
From: Zhu Yi @ 2007-12-19 5:59 UTC (permalink / raw)
To: linville; +Cc: linux-wireless, Zhu Yi, Johannes Berg
This patch moves _cancel_deferred_work out of mutex protection and removes
unnecessary mutex in pci_suspend and pci_resume.
Cc: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
---
drivers/net/wireless/iwlwifi/iwl3945-base.c | 18 +++++-------------
drivers/net/wireless/iwlwifi/iwl4965-base.c | 18 +++++-------------
2 files changed, 10 insertions(+), 26 deletions(-)
diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c
index 88cf035..f0303e8 100644
--- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c
@@ -6355,8 +6355,6 @@ static void __iwl3945_down(struct iwl3945_priv *priv)
/* Unblock any waiting calls */
wake_up_interruptible_all(&priv->wait_command_queue);
- iwl_cancel_deferred_work(priv);
-
/* Wipe out the EXIT_PENDING status bit if we are not actually
* exiting the module */
if (!exit_pending)
@@ -6431,6 +6429,8 @@ static void iwl3945_down(struct iwl3945_priv *priv)
mutex_lock(&priv->mutex);
__iwl_down(priv);
mutex_unlock(&priv->mutex);
+
+ iwl_cancel_deferred_work(priv);
}
#define MAX_HW_RESTARTS 5
@@ -8739,10 +8739,9 @@ static void iwl3945_pci_remove(struct pci_dev *pdev)
IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
- mutex_lock(&priv->mutex);
set_bit(STATUS_EXIT_PENDING, &priv->status);
- __iwl_down(priv);
- mutex_unlock(&priv->mutex);
+
+ iwl_down(priv);
/* Free MAC hash list for ADHOC */
for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
@@ -8801,12 +8800,10 @@ static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct iwl_priv *priv = pci_get_drvdata(pdev);
- mutex_lock(&priv->mutex);
-
set_bit(STATUS_IN_SUSPEND, &priv->status);
/* Take down the device; powers it off, etc. */
- __iwl_down(priv);
+ iwl_down(priv);
if (priv->mac80211_registered)
ieee80211_stop_queues(priv->hw);
@@ -8815,8 +8812,6 @@ static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
pci_disable_device(pdev);
pci_set_power_state(pdev, PCI_D3hot);
- mutex_unlock(&priv->mutex);
-
return 0;
}
@@ -8874,8 +8869,6 @@ static int iwl3945_pci_resume(struct pci_dev *pdev)
printk(KERN_INFO "Coming out of suspend...\n");
- mutex_lock(&priv->mutex);
-
pci_set_power_state(pdev, PCI_D0);
err = pci_enable_device(pdev);
pci_restore_state(pdev);
@@ -8889,7 +8882,6 @@ static int iwl3945_pci_resume(struct pci_dev *pdev)
pci_write_config_byte(pdev, 0x41, 0x00);
iwl_resume(priv);
- mutex_unlock(&priv->mutex);
return 0;
}
diff --git a/drivers/net/wireless/iwlwifi/iwl4965-base.c b/drivers/net/wireless/iwlwifi/iwl4965-base.c
index df6f3b1..87cc281 100644
--- a/drivers/net/wireless/iwlwifi/iwl4965-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl4965-base.c
@@ -6767,8 +6767,6 @@ static void __iwl4965_down(struct iwl4965_priv *priv)
/* Unblock any waiting calls */
wake_up_interruptible_all(&priv->wait_command_queue);
- iwl_cancel_deferred_work(priv);
-
/* Wipe out the EXIT_PENDING status bit if we are not actually
* exiting the module */
if (!exit_pending)
@@ -6844,6 +6842,8 @@ static void iwl4965_down(struct iwl4965_priv *priv)
mutex_lock(&priv->mutex);
__iwl_down(priv);
mutex_unlock(&priv->mutex);
+
+ iwl_cancel_deferred_work(priv);
}
#define MAX_HW_RESTARTS 5
@@ -9308,10 +9308,9 @@ static void iwl4965_pci_remove(struct pci_dev *pdev)
IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
- mutex_lock(&priv->mutex);
set_bit(STATUS_EXIT_PENDING, &priv->status);
- __iwl_down(priv);
- mutex_unlock(&priv->mutex);
+
+ iwl_down(priv);
/* Free MAC hash list for ADHOC */
for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
@@ -9370,12 +9369,10 @@ static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct iwl_priv *priv = pci_get_drvdata(pdev);
- mutex_lock(&priv->mutex);
-
set_bit(STATUS_IN_SUSPEND, &priv->status);
/* Take down the device; powers it off, etc. */
- __iwl_down(priv);
+ iwl_down(priv);
if (priv->mac80211_registered)
ieee80211_stop_queues(priv->hw);
@@ -9384,8 +9381,6 @@ static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
pci_disable_device(pdev);
pci_set_power_state(pdev, PCI_D3hot);
- mutex_unlock(&priv->mutex);
-
return 0;
}
@@ -9443,8 +9438,6 @@ static int iwl4965_pci_resume(struct pci_dev *pdev)
printk(KERN_INFO "Coming out of suspend...\n");
- mutex_lock(&priv->mutex);
-
pci_set_power_state(pdev, PCI_D0);
err = pci_enable_device(pdev);
pci_restore_state(pdev);
@@ -9458,7 +9451,6 @@ static int iwl4965_pci_resume(struct pci_dev *pdev)
pci_write_config_byte(pdev, 0x41, 0x00);
iwl_resume(priv);
- mutex_unlock(&priv->mutex);
return 0;
}
--
1.5.3.6
^ permalink raw reply related [flat|nested] 3+ messages in thread* [PATCH] iwlwifi: fix possible priv->mutex deadlock during suspend
@ 2007-12-19 5:59 Zhu Yi
2007-12-19 6:01 ` Zhu Yi
0 siblings, 1 reply; 3+ messages in thread
From: Zhu Yi @ 2007-12-19 5:59 UTC (permalink / raw)
To: linville; +Cc: linux-wireless, Zhu Yi, Johannes Berg
This patch moves _cancel_deferred_work out of mutex protection and removes
unnecessary mutex in pci_suspend and pci_resume.
Cc: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
---
drivers/net/wireless/iwlwifi/iwl3945-base.c | 18 +++++-------------
drivers/net/wireless/iwlwifi/iwl4965-base.c | 18 +++++-------------
2 files changed, 10 insertions(+), 26 deletions(-)
diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c
index 3d1da07..1a6b0e0 100644
--- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c
@@ -6246,8 +6246,6 @@ static void __iwl_down(struct iwl_priv *priv)
/* Unblock any waiting calls */
wake_up_interruptible_all(&priv->wait_command_queue);
- iwl_cancel_deferred_work(priv);
-
/* Wipe out the EXIT_PENDING status bit if we are not actually
* exiting the module */
if (!exit_pending)
@@ -6322,6 +6320,8 @@ static void iwl_down(struct iwl_priv *priv)
mutex_lock(&priv->mutex);
__iwl_down(priv);
mutex_unlock(&priv->mutex);
+
+ iwl_cancel_deferred_work(priv);
}
#define MAX_HW_RESTARTS 5
@@ -8580,10 +8580,9 @@ static void iwl_pci_remove(struct pci_dev *pdev)
IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
- mutex_lock(&priv->mutex);
set_bit(STATUS_EXIT_PENDING, &priv->status);
- __iwl_down(priv);
- mutex_unlock(&priv->mutex);
+
+ iwl_down(priv);
/* Free MAC hash list for ADHOC */
for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
@@ -8642,12 +8641,10 @@ static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct iwl_priv *priv = pci_get_drvdata(pdev);
- mutex_lock(&priv->mutex);
-
set_bit(STATUS_IN_SUSPEND, &priv->status);
/* Take down the device; powers it off, etc. */
- __iwl_down(priv);
+ iwl_down(priv);
if (priv->mac80211_registered)
ieee80211_stop_queues(priv->hw);
@@ -8656,8 +8653,6 @@ static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
pci_disable_device(pdev);
pci_set_power_state(pdev, PCI_D3hot);
- mutex_unlock(&priv->mutex);
-
return 0;
}
@@ -8715,8 +8710,6 @@ static int iwl_pci_resume(struct pci_dev *pdev)
printk(KERN_INFO "Coming out of suspend...\n");
- mutex_lock(&priv->mutex);
-
pci_set_power_state(pdev, PCI_D0);
err = pci_enable_device(pdev);
pci_restore_state(pdev);
@@ -8730,7 +8723,6 @@ static int iwl_pci_resume(struct pci_dev *pdev)
pci_write_config_byte(pdev, 0x41, 0x00);
iwl_resume(priv);
- mutex_unlock(&priv->mutex);
return 0;
}
diff --git a/drivers/net/wireless/iwlwifi/iwl4965-base.c b/drivers/net/wireless/iwlwifi/iwl4965-base.c
index b54fe5e..6cd57c2 100644
--- a/drivers/net/wireless/iwlwifi/iwl4965-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl4965-base.c
@@ -6601,8 +6601,6 @@ static void __iwl_down(struct iwl_priv *priv)
/* Unblock any waiting calls */
wake_up_interruptible_all(&priv->wait_command_queue);
- iwl_cancel_deferred_work(priv);
-
/* Wipe out the EXIT_PENDING status bit if we are not actually
* exiting the module */
if (!exit_pending)
@@ -6677,6 +6675,8 @@ static void iwl_down(struct iwl_priv *priv)
mutex_lock(&priv->mutex);
__iwl_down(priv);
mutex_unlock(&priv->mutex);
+
+ iwl_cancel_deferred_work(priv);
}
#define MAX_HW_RESTARTS 5
@@ -9174,10 +9174,9 @@ static void iwl_pci_remove(struct pci_dev *pdev)
IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
- mutex_lock(&priv->mutex);
set_bit(STATUS_EXIT_PENDING, &priv->status);
- __iwl_down(priv);
- mutex_unlock(&priv->mutex);
+
+ iwl_down(priv);
/* Free MAC hash list for ADHOC */
for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
@@ -9236,12 +9235,10 @@ static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct iwl_priv *priv = pci_get_drvdata(pdev);
- mutex_lock(&priv->mutex);
-
set_bit(STATUS_IN_SUSPEND, &priv->status);
/* Take down the device; powers it off, etc. */
- __iwl_down(priv);
+ iwl_down(priv);
if (priv->mac80211_registered)
ieee80211_stop_queues(priv->hw);
@@ -9250,8 +9247,6 @@ static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
pci_disable_device(pdev);
pci_set_power_state(pdev, PCI_D3hot);
- mutex_unlock(&priv->mutex);
-
return 0;
}
@@ -9309,8 +9304,6 @@ static int iwl_pci_resume(struct pci_dev *pdev)
printk(KERN_INFO "Coming out of suspend...\n");
- mutex_lock(&priv->mutex);
-
pci_set_power_state(pdev, PCI_D0);
err = pci_enable_device(pdev);
pci_restore_state(pdev);
@@ -9324,7 +9317,6 @@ static int iwl_pci_resume(struct pci_dev *pdev)
pci_write_config_byte(pdev, 0x41, 0x00);
iwl_resume(priv);
- mutex_unlock(&priv->mutex);
return 0;
}
--
1.5.3.6
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH] iwlwifi: fix possible priv->mutex deadlock during suspend
2007-12-19 5:59 Zhu Yi
@ 2007-12-19 6:01 ` Zhu Yi
0 siblings, 0 replies; 3+ messages in thread
From: Zhu Yi @ 2007-12-19 6:01 UTC (permalink / raw)
To: linville; +Cc: linux-wireless, Johannes Berg
On Wed, 2007-12-19 at 13:59 +0800, Zhu Yi wrote:
> This patch moves _cancel_deferred_work out of mutex protection and
> removes
> unnecessary mutex in pci_suspend and pci_resume.
>
> Cc: Johannes Berg <johannes@sipsolutions.net>
> Signed-off-by: Zhu Yi <yi.zhu@intel.com>
The one is for 2.6.24.
Thanks,
-yi
^ permalink raw reply [flat|nested] 3+ messages in thread
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