can: c_can_pci: enable PCI bus master only for MSI

Coverity complains that c_can_pci_probe() calls pci_enable_msi() without
checking the result:

CID 712278 (#1 of 1): Unchecked return value (CHECKED_RETURN) 3. check_return:
Calling pci_enable_msi_block without checking return value (as is done
elsewhere 88 out of 105 times).
 88        pci_enable_msi(pdev);

This is CID 712278.

Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Reported-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/net/can/c_can/c_can_pci.c b/drivers/net/can/c_can/c_can_pci.c
index 1b7ff400711a..fe5f6303b584 100644
--- a/drivers/net/can/c_can/c_can_pci.c
+++ b/drivers/net/can/c_can/c_can_pci.c
@@ -84,8 +84,11 @@ static int c_can_pci_probe(struct pci_dev *pdev,
                 goto out_disable_device;
         }
 
-        pci_set_master(pdev);
-        pci_enable_msi(pdev);
+        ret = pci_enable_msi(pdev);
+        if (!ret) {
+                dev_info(&pdev->dev, "MSI enabled\n");
+                pci_set_master(pdev);
+        }
 
         addr = pci_iomap(pdev, 0, pci_resource_len(pdev, 0));
         if (!addr) {