netdev - [PATCH 05/13] qla3xxx: Fix deadlock issue on error paths

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Message-Id: <11725168031232-git-send-email-ron.mercer@qlogic.com>
Date:	Mon, 26 Feb 2007 11:06:35 -0800
From:	Ron Mercer <ron.mercer@...gic.com>
To:	jeff@...zik.org
Cc:	ron.mercer@...gic.com, romieu@...zoreil.com,
	benjamin.li@...gic.com, netdev@...r.kernel.org
Subject: [PATCH 05/13] qla3xxx: Fix deadlock issue on error paths

From: Benjamin Li <benjamin.li@...gic.com>

1) Fix deadlock issue when in QL_RESET_ACTIVE state and traversing
   through the Link State Machine
2) Fix deadlock issue when ethtool would call ql_get_settings()
3) Fix deadlock issue when adaptor is ifup'ed but adaptor fails to initialize

Signed-off-by: Benjamin Li <benjamin.li@...gic.com>
Signed-off-by: Ron Mercer <ron.mercer@...gic.com>
---
 drivers/net/qla3xxx.c |   15 ++++++++++++---
 1 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/drivers/net/qla3xxx.c b/drivers/net/qla3xxx.c
index b853669..59cebd6 100755
--- a/drivers/net/qla3xxx.c
+++ b/drivers/net/qla3xxx.c
@@ -1388,6 +1388,8 @@ static void ql_link_state_machine(struct ql3_adapter *qdev)
 			printk(KERN_INFO PFX
 			       "%s: Reset in progress, skip processing link "
 			       "state.\n", qdev->ndev->name);
+
+		spin_unlock_irqrestore(&qdev->hw_lock, hw_flags);		
 		return;
 	}
 
@@ -1519,8 +1521,10 @@ static int ql_get_auto_cfg_status(struct ql3_adapter *qdev)
 	spin_lock_irqsave(&qdev->hw_lock, hw_flags);
 	if(ql_sem_spinlock(qdev, QL_PHY_GIO_SEM_MASK,
 		(QL_RESOURCE_BITS_BASE_CODE | (qdev->mac_index) *
-			 2) << 7))
+			 2) << 7)) {
+		spin_unlock_irqrestore(&qdev->hw_lock, hw_flags);
 		return 0;
+	}
 	status = ql_is_auto_cfg(qdev);
 	ql_sem_unlock(qdev, QL_PHY_GIO_SEM_MASK);
 	spin_unlock_irqrestore(&qdev->hw_lock, hw_flags);
@@ -1534,8 +1538,10 @@ static u32 ql_get_speed(struct ql3_adapter *qdev)
 	spin_lock_irqsave(&qdev->hw_lock, hw_flags);
 	if(ql_sem_spinlock(qdev, QL_PHY_GIO_SEM_MASK,
 		(QL_RESOURCE_BITS_BASE_CODE | (qdev->mac_index) *
-			 2) << 7))
+			 2) << 7)) {
+		spin_unlock_irqrestore(&qdev->hw_lock, hw_flags);
 		return 0;
+	}
 	status = ql_get_link_speed(qdev);
 	ql_sem_unlock(qdev, QL_PHY_GIO_SEM_MASK);
 	spin_unlock_irqrestore(&qdev->hw_lock, hw_flags);
@@ -1549,8 +1555,10 @@ static int ql_get_full_dup(struct ql3_adapter *qdev)
 	spin_lock_irqsave(&qdev->hw_lock, hw_flags);
 	if(ql_sem_spinlock(qdev, QL_PHY_GIO_SEM_MASK,
 		(QL_RESOURCE_BITS_BASE_CODE | (qdev->mac_index) *
-			 2) << 7))
+			 2) << 7)) {
+		spin_unlock_irqrestore(&qdev->hw_lock, hw_flags);
 		return 0;
+	}
 	status = ql_is_link_full_dup(qdev);
 	ql_sem_unlock(qdev, QL_PHY_GIO_SEM_MASK);
 	spin_unlock_irqrestore(&qdev->hw_lock, hw_flags);
@@ -3312,6 +3320,7 @@ static int ql_adapter_up(struct ql3_adapter *qdev)
 err_init:
 	ql_sem_unlock(qdev, QL_DRVR_SEM_MASK);
 err_lock:
+	spin_unlock_irqrestore(&qdev->hw_lock, hw_flags);
 	free_irq(qdev->pdev->irq, ndev);
 err_irq:
 	if (qdev->msi && test_bit(QL_MSI_ENABLED,&qdev->flags)) {
-- 
1.5.0.rc4.16.g9e258

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