[PATCH] PCI: hv: Use kfree(hbus) in hv_pci_probe()'s error handling path

From: Dexuan Cui <decui@microsoft.com>
To: kys@microsoft.com, haiyangz@microsoft.com,
	sthemmin@microsoft.com, sashal@kernel.org,
	lorenzo.pieralisi@arm.com, bhelgaas@google.com,
	linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org,
	linux-kernel@vger.kernel.org, mikelley@microsoft.com,
	Alexander.Levin@microsoft.com
Cc: Dexuan Cui <decui@microsoft.com>
Subject: [PATCH] PCI: hv: Use kfree(hbus) in hv_pci_probe()'s error handling path
Date: Mon,  6 Jan 2020 14:39:11 -0800	[thread overview]
Message-ID: <1578350351-129783-1-git-send-email-decui@microsoft.com> (raw)

Now that we use kzalloc() to allocate the hbus buffer, we should use
kfree() in the error path as well.

Also remove the type casting, since it's unnecessary in C.

Fixes: 877b911a5ba0 ("PCI: hv: Avoid a kmemleak false positive caused by the hbus buffer")
Signed-off-by: Dexuan Cui <decui@microsoft.com>
---

Sorry for missing the error handling path.

 drivers/pci/controller/pci-hyperv.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c
index 9977abff92fc..15011a349520 100644
--- a/drivers/pci/controller/pci-hyperv.c
+++ b/drivers/pci/controller/pci-hyperv.c
@@ -2922,7 +2922,7 @@ static int hv_pci_probe(struct hv_device *hdev,
 	 * positive by using kmemleak_alloc() and kmemleak_free() to ask
 	 * kmemleak to track and scan the hbus buffer.
 	 */
-	hbus = (struct hv_pcibus_device *)kzalloc(HV_HYP_PAGE_SIZE, GFP_KERNEL);
+	hbus = kzalloc(HV_HYP_PAGE_SIZE, GFP_KERNEL);
 	if (!hbus)
 		return -ENOMEM;
 	hbus->state = hv_pcibus_init;
@@ -3058,7 +3058,7 @@ static int hv_pci_probe(struct hv_device *hdev,
 free_dom:
 	hv_put_dom_num(hbus->sysdata.domain);
 free_bus:
-	free_page((unsigned long)hbus);
+	kfree(hbus);
 	return ret;
 }
 
-- 
2.19.1

