linux-kernel - [PATCH] PCI: xilinx: Modify error handling

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Message-ID: <20160629151820.GA14282@amitoj-Inspiron-3542>
Date:	Wed, 29 Jun 2016 20:48:20 +0530
From:	Amitoj Kaur Chawla <amitoj1606@...il.com>
To:	bhelgaas@...gle.com, michal.simek@...inx.com,
	soren.brinkmann@...inx.com, linux-pci@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:	julia.lawall@...6.fr
Subject: [PATCH] PCI: xilinx: Modify error handling

Failure of of_get_next_child returns NULL, not an ERR_PTR. Use
appropriate error code -ENODEV to be returned on failure instead.

The Coccinelle semantic patch used to find this issue is as follows:
@@
expression E,E1;
@@

if (
*   E == NULL
   ) { <+... when != E = E1
        PTR_ERR(E)
       ...+> }

Signed-off-by: Amitoj Kaur Chawla <amitoj1606@...il.com>
---
 drivers/pci/host/pcie-xilinx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/host/pcie-xilinx.c b/drivers/pci/host/pcie-xilinx.c
index 65f0fe0..d76ea8d 100644
--- a/drivers/pci/host/pcie-xilinx.c
+++ b/drivers/pci/host/pcie-xilinx.c
@@ -550,7 +550,7 @@ static int xilinx_pcie_init_irq_domain(struct xilinx_pcie_port *port)
 	pcie_intc_node = of_get_next_child(node, NULL);
 	if (!pcie_intc_node) {
 		dev_err(dev, "No PCIe Intc node found\n");
-		return PTR_ERR(pcie_intc_node);
+		return -ENODEV;
 	}
 
 	port->irq_domain = irq_domain_add_linear(pcie_intc_node, 4,
-- 
1.9.1