linux-kernel - [PATCH 2/2] PCI: iproc: avoid maybe-uninitialized warning

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Message-Id: <20161122141844.1655574-2-arnd@arndb.de>
Date:   Tue, 22 Nov 2016 15:17:52 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Bjorn Helgaas <bhelgaas@...gle.com>
Cc:     Arnd Bergmann <arnd@...db.de>, Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Jon Mason <jonmason@...adcom.com>,
        bcm-kernel-feedback-list@...adcom.com,
        Oza Oza <oza.oza@...adcom.com>,
        "Dmitry V. Krivenok" <krivenok.dmitry@...il.com>,
        linux-pci@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] PCI: iproc: avoid maybe-uninitialized warning

gcc notices that calling iproc_pcie_setup_ib with ib->nr_regions==0
would result in an uninitialized return value:

drivers/pci/host/pcie-iproc.c: In function 'iproc_pcie_setup_ib':
drivers/pci/host/pcie-iproc.c:894:6: error: 'ret' may be used uninitialized in this function [-Werror=maybe-uninitialized]

This can't really happen, but the correct behavior of the function
is probably to return -EINVAL if it ever did.

Fixes: 4213e15c364e ("PCI: iproc: Make outbound mapping code more generic")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/pci/host/pcie-iproc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pci/host/pcie-iproc.c b/drivers/pci/host/pcie-iproc.c
index 857ff5198317..0359569c8d78 100644
--- a/drivers/pci/host/pcie-iproc.c
+++ b/drivers/pci/host/pcie-iproc.c
@@ -936,6 +936,7 @@ static int iproc_pcie_setup_ib(struct iproc_pcie *pcie,
 
 		}
 	}
+	ret = -EINVAL;
 err_ib:
 	dev_err(dev, "unable to configure inbound mapping\n");
 	dev_err(dev, "axi %pap, pci %pap, res size %pap\n",
-- 
2.9.0