myri10ge: fix error return code

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>

The patch also modifies the test of mgp->cmd to satisfy checkpatch.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/myricom/myri10ge/myri10ge.c b/drivers/net/ethernet/myricom/myri10ge/myri10ge.c
index af09905..71af98b 100644 (file)
--- a/drivers/net/ethernet/myricom/myri10ge/myri10ge.c
+++ b/drivers/net/ethernet/myricom/myri10ge/myri10ge.c
@@ -4033,8 +4033,10 @@ static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
        (void)pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
        mgp->cmd = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->cmd),
                                      &mgp->cmd_bus, GFP_KERNEL);
-       if (mgp->cmd == NULL)
+       if (!mgp->cmd) {
+               status = -ENOMEM;
                goto abort_with_enabled;
+       }
 
        mgp->board_span = pci_resource_len(pdev, 0);
        mgp->iomem_base = pci_resource_start(pdev, 0);