linux-kernel - [PATCH 3.18 048/105] scsi: 3ware: fix return 0 on the error path of probe

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Date:   Mon, 24 Sep 2018 13:33:34 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Anton Vasilyev <vasilyev@...ras.ru>,
        Adam Radford <aradford@...il.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 3.18 048/105] scsi: 3ware: fix return 0 on the error path of probe

3.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Anton Vasilyev <vasilyev@...ras.ru>

[ Upstream commit 4dc98c1995482262e70e83ef029135247fafe0f2 ]

tw_probe() returns 0 in case of fail of tw_initialize_device_extension(),
pci_resource_start() or tw_reset_sequence() and releases resources.
twl_probe() returns 0 in case of fail of twl_initialize_device_extension(),
pci_iomap() and twl_reset_sequence().  twa_probe() returns 0 in case of
fail of tw_initialize_device_extension(), ioremap() and
twa_reset_sequence().

The patch adds retval initialization for these cases.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Anton Vasilyev <vasilyev@...ras.ru>
Acked-by: Adam Radford <aradford@...il.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/scsi/3w-9xxx.c |    6 +++++-
 drivers/scsi/3w-sas.c  |    3 +++
 drivers/scsi/3w-xxxx.c |    2 ++
 3 files changed, 10 insertions(+), 1 deletion(-)

--- a/drivers/scsi/3w-9xxx.c
+++ b/drivers/scsi/3w-9xxx.c
@@ -2057,6 +2057,7 @@ static int twa_probe(struct pci_dev *pde
 
 	if (twa_initialize_device_extension(tw_dev)) {
 		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x25, "Failed to initialize device extension");
+		retval = -ENOMEM;
 		goto out_free_device_extension;
 	}
 
@@ -2079,6 +2080,7 @@ static int twa_probe(struct pci_dev *pde
 	tw_dev->base_addr = ioremap(mem_addr, mem_len);
 	if (!tw_dev->base_addr) {
 		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x35, "Failed to ioremap");
+		retval = -ENOMEM;
 		goto out_release_mem_region;
 	}
 
@@ -2086,8 +2088,10 @@ static int twa_probe(struct pci_dev *pde
 	TW_DISABLE_INTERRUPTS(tw_dev);
 
 	/* Initialize the card */
-	if (twa_reset_sequence(tw_dev, 0))
+	if (twa_reset_sequence(tw_dev, 0)) {
+		retval = -ENOMEM;
 		goto out_iounmap;
+	}
 
 	/* Set host specific parameters */
 	if ((pdev->device == PCI_DEVICE_ID_3WARE_9650SE) ||
--- a/drivers/scsi/3w-sas.c
+++ b/drivers/scsi/3w-sas.c
@@ -1613,6 +1613,7 @@ static int twl_probe(struct pci_dev *pde
 
 	if (twl_initialize_device_extension(tw_dev)) {
 		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1a, "Failed to initialize device extension");
+		retval = -ENOMEM;
 		goto out_free_device_extension;
 	}
 
@@ -1627,6 +1628,7 @@ static int twl_probe(struct pci_dev *pde
 	tw_dev->base_addr = pci_iomap(pdev, 1, 0);
 	if (!tw_dev->base_addr) {
 		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1c, "Failed to ioremap");
+		retval = -ENOMEM;
 		goto out_release_mem_region;
 	}
 
@@ -1636,6 +1638,7 @@ static int twl_probe(struct pci_dev *pde
 	/* Initialize the card */
 	if (twl_reset_sequence(tw_dev, 0)) {
 		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1d, "Controller reset failed during probe");
+		retval = -ENOMEM;
 		goto out_iounmap;
 	}
 
--- a/drivers/scsi/3w-xxxx.c
+++ b/drivers/scsi/3w-xxxx.c
@@ -2291,6 +2291,7 @@ static int tw_probe(struct pci_dev *pdev
 
 	if (tw_initialize_device_extension(tw_dev)) {
 		printk(KERN_WARNING "3w-xxxx: Failed to initialize device extension.");
+		retval = -ENOMEM;
 		goto out_free_device_extension;
 	}
 
@@ -2305,6 +2306,7 @@ static int tw_probe(struct pci_dev *pdev
 	tw_dev->base_addr = pci_resource_start(pdev, 0);
 	if (!tw_dev->base_addr) {
 		printk(KERN_WARNING "3w-xxxx: Failed to get io address.");
+		retval = -ENOMEM;
 		goto out_release_mem_region;
 	}