[PATCH 1/8] net: Xilinx: fix error return code

[Julia Lawall]

Return a negative error code on failure.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
identifier ret; expression e1,e2;
@@
(
if (\(ret < 0\|ret != 0\))
 { ... return ret; }
|
ret = 0
)
... when != ret = e1
    when != &ret
*if(...)
{
  ... when != ret = e2
      when forall
 return ret;
}
// </smpl>

Signed-off-by: Julia Lawall <julia.law...@lip6.fr>

---
 drivers/net/ethernet/xilinx/ll_temac_main.c   |    2 ++
 drivers/net/ethernet/xilinx/xilinx_emaclite.c |    1 +
 2 files changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/xilinx/ll_temac_main.c 
b/drivers/net/ethernet/xilinx/ll_temac_main.c
index 9c2d91e..dbcbf0c 100644
--- a/drivers/net/ethernet/xilinx/ll_temac_main.c
+++ b/drivers/net/ethernet/xilinx/ll_temac_main.c
@@ -1043,6 +1043,7 @@ static int temac_of_probe(struct platform_device *op)
        lp->regs = of_iomap(op->dev.of_node, 0);
        if (!lp->regs) {
                dev_err(&op->dev, "could not map temac regs.\n");
+               rc = -ENOMEM;
                goto nodev;
        }
 
@@ -1062,6 +1063,7 @@ static int temac_of_probe(struct platform_device *op)
        np = of_parse_phandle(op->dev.of_node, "llink-connected", 0);
        if (!np) {
                dev_err(&op->dev, "could not find DMA node\n");
+               rc = -ENODEV;
                goto err_iounmap;
        }
 
diff --git a/drivers/net/ethernet/xilinx/xilinx_emaclite.c 
b/drivers/net/ethernet/xilinx/xilinx_emaclite.c
index 2485879..9d4ce38 100644
--- a/drivers/net/ethernet/xilinx/xilinx_emaclite.c
+++ b/drivers/net/ethernet/xilinx/xilinx_emaclite.c
@@ -1109,6 +1109,7 @@ static int xemaclite_of_probe(struct platform_device 
*ofdev)
        res = platform_get_resource(ofdev, IORESOURCE_IRQ, 0);
        if (!res) {
                dev_err(dev, "no IRQ found\n");
+               rc = -ENXIO;
                goto error;
        }
 

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