linux-kernel - [PATCH 1/2] staging: sm750fb: fixing function return with lock held

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Message-Id: <1490987402-9301-1-git-send-email-prasant.jalan@gmail.com>
Date:   Sat,  1 Apr 2017 00:40:01 +0530
From:   Prasant Jalan <prasant.jalan@...il.com>
To:     sudipm.mukherjee@...il.com
Cc:     sudip.mukherjee@...ethink.co.uk, teddy.wang@...iconmotion.com,
        gregkh@...uxfoundation.org, linux-fbdev@...r.kernel.org,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        Prasant Jalan <prasant.jalan@...il.com>
Subject: [PATCH 1/2] staging: sm750fb: fixing function return with lock held

lynxfb_suspend() & lynxfb_resume() return on errors while holding
console_lock.

Adding 'goto' such that proper cleanups can be done before returning
from function and therefore console_lock can be released before
returning.

Signed-off-by: Prasant Jalan <prasant.jalan@...il.com>
---
 drivers/staging/sm750fb/sm750.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/sm750fb/sm750.c b/drivers/staging/sm750fb/sm750.c
index c618c56..445c68d 100644
--- a/drivers/staging/sm750fb/sm750.c
+++ b/drivers/staging/sm750fb/sm750.c
@@ -419,7 +419,7 @@ static int lynxfb_suspend(struct pci_dev *pdev, pm_message_t mesg)
 		if (ret) {
 			dev_err(&pdev->dev,
 				"error:%d occurred in pci_save_state\n", ret);
-			return ret;
+			goto lynxfb_suspend_err;
 		}
 
 		ret = pci_set_power_state(pdev, pci_choose_state(pdev, mesg));
@@ -427,11 +427,13 @@ static int lynxfb_suspend(struct pci_dev *pdev, pm_message_t mesg)
 			dev_err(&pdev->dev,
 				"error:%d occurred in pci_set_power_state\n",
 				ret);
-			return ret;
+			goto lynxfb_suspend_err;
 		}
 	}
 
 	pdev->dev.power.power_state = mesg;
+
+lynxfb_suspend_err:
 	console_unlock();
 	return ret;
 }
@@ -456,7 +458,7 @@ static int lynxfb_resume(struct pci_dev *pdev)
 	if (ret) {
 		dev_err(&pdev->dev,
 			"error:%d occurred in pci_set_power_state\n", ret);
-		return ret;
+		goto lynxfb_resume_err;
 	}
 
 	if (pdev->dev.power.power_state.event != PM_EVENT_FREEZE) {
@@ -466,7 +468,7 @@ static int lynxfb_resume(struct pci_dev *pdev)
 			dev_err(&pdev->dev,
 				"error:%d occurred in pci_enable_device\n",
 				ret);
-			return ret;
+			goto lynxfb_resume_err;
 		}
 		pci_set_master(pdev);
 	}
@@ -498,6 +500,8 @@ static int lynxfb_resume(struct pci_dev *pdev)
 	}
 
 	pdev->dev.power.power_state.event = PM_EVENT_RESUME;
+
+lynxfb_resume_err:
 	console_unlock();
 	return ret;
 }
-- 
2.7.4