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

From: Greg Kroah-Hartman
Date: Mon Sep 24 2018 - 07:39:13 EST


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

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

From: Anton Vasilyev <vasilyev@xxxxxxxxx>

[ 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@xxxxxxxxx>
Acked-by: Adam Radford <aradford@xxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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;
}