linux-kernel - [PATCH 4/5] PCI: hv: hv_compose_msi

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Message-ID: <MWHPR03MB266954FABD2DD49DC19CF106BFEB0@MWHPR03MB2669.namprd03.prod.outlook.com>
Date:   Tue, 23 Aug 2016 04:48:11 +0000
From:   Dexuan Cui <decui@...rosoft.com>
To:     Bjorn Helgaas <bhelgaas@...gle.com>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        KY Srinivasan <kys@...rosoft.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
        "olaf@...fle.de" <olaf@...fle.de>,
        "apw@...onical.com" <apw@...onical.com>,
        "jasowang@...hat.com" <jasowang@...hat.com>,
        "vkuznets@...hat.com" <vkuznets@...hat.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Hadden Hoppert <haddenh@...rosoft.com>,
        "helgaas@...nel.org" <helgaas@...nel.org>,
        "Stephen Hemminger" <sthemmin@...rosoft.com>
Subject: [PATCH 4/5] PCI: hv: hv_compose_msi_msg: handle the 'ret' value


I happened to find this when reading the code.
I didn't get a real issue however.

Cc: Jake Oshins <jakeo@...rosoft.com>
Cc: K. Y. Srinivasan <kys@...rosoft.com>
Cc: Haiyang Zhang <haiyangz@...rosoft.com>
Cc: Vitaly Kuznetsov <vkuznets@...hat.com>
Signed-off-by: Dexuan Cui <decui@...rosoft.com>
---
 drivers/pci/host/pci-hyperv.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/host/pci-hyperv.c b/drivers/pci/host/pci-hyperv.c
index aef2e1e..f337239 100644
--- a/drivers/pci/host/pci-hyperv.c
+++ b/drivers/pci/host/pci-hyperv.c
@@ -893,8 +893,10 @@ static void hv_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
 			       sizeof(*int_pkt), (unsigned long)&ctxt.pkt,
 			       VM_PKT_DATA_INBAND,
 			       VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
-	if (!ret)
-		wait_for_completion(&comp.comp_pkt.host_event);
+	if (ret)
+		goto free_int_desc;
+
+	wait_for_completion(&comp.comp_pkt.host_event);
 
 	if (comp.comp_pkt.completion_status < 0) {
 		dev_err(&hbus->hdev->device,
-- 
2.7.4