linux-kernel - [PATCH 4.14 022/191] EDAC/i5100: Fix error handling order in i5100_init

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Date:   Tue, 27 Oct 2020 14:47:57 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dinghao Liu <dinghao.liu@....edu.cn>,
        Borislav Petkov <bp@...e.de>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.14 022/191] EDAC/i5100: Fix error handling order in i5100_init_one()

From: Dinghao Liu <dinghao.liu@....edu.cn>

[ Upstream commit 857a3139bd8be4f702c030c8ca06f3fd69c1741a ]

When pci_get_device_func() fails, the driver doesn't need to execute
pci_dev_put(). mci should still be freed, though, to prevent a memory
leak. When pci_enable_device() fails, the error injection PCI device
"einj" doesn't need to be disabled either.

 [ bp: Massage commit message, rename label to "bail_mc_free". ]

Fixes: 52608ba205461 ("i5100_edac: probe for device 19 function 0")
Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>
Signed-off-by: Borislav Petkov <bp@...e.de>
Link: https://lkml.kernel.org/r/20200826121437.31606-1-dinghao.liu@zju.edu.cn
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/edac/i5100_edac.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/edac/i5100_edac.c b/drivers/edac/i5100_edac.c
index b506eef6b146d..858ef4e15180b 100644
--- a/drivers/edac/i5100_edac.c
+++ b/drivers/edac/i5100_edac.c
@@ -1072,16 +1072,15 @@ static int i5100_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 				    PCI_DEVICE_ID_INTEL_5100_19, 0);
 	if (!einj) {
 		ret = -ENODEV;
-		goto bail_einj;
+		goto bail_mc_free;
 	}
 
 	rc = pci_enable_device(einj);
 	if (rc < 0) {
 		ret = rc;
-		goto bail_disable_einj;
+		goto bail_einj;
 	}
 
-
 	mci->pdev = &pdev->dev;
 
 	priv = mci->pvt_info;
@@ -1147,14 +1146,14 @@ static int i5100_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 bail_scrub:
 	priv->scrub_enable = 0;
 	cancel_delayed_work_sync(&(priv->i5100_scrubbing));
-	edac_mc_free(mci);
-
-bail_disable_einj:
 	pci_disable_device(einj);
 
 bail_einj:
 	pci_dev_put(einj);
 
+bail_mc_free:
+	edac_mc_free(mci);
+
 bail_disable_ch1:
 	pci_disable_device(ch1mm);
 
-- 
2.25.1