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authorJulia Lawall <julia@diku.dk>2009-07-19 02:13:04 -0400
committerDavid S. Miller <davem@davemloft.net>2009-07-21 16:00:43 -0400
commit0021195c40326ac4702faf28c32accd91b331641 (patch)
tree50cdfd6314313f3604b73396b7d72549e88abd66 /drivers/net/ibm_newemac
parentacb9c1b2f406d25c381de2b429f65706cc04d3b5 (diff)
drivers/net: Move a dereference below a NULL test
If the NULL test is necessary, then the dereferences should be moved below the NULL test. The semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ type T; expression E,E1; identifier i,fld; statement S; @@ - T i = E->fld; + T i; ... when != E=E1 when != i BUG_ON (E == NULL||...); + i = E->fld; // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ibm_newemac')
-rw-r--r--drivers/net/ibm_newemac/rgmii.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/net/ibm_newemac/rgmii.c b/drivers/net/ibm_newemac/rgmii.c
index 1d5379de6900..8d76cb89dbd6 100644
--- a/drivers/net/ibm_newemac/rgmii.c
+++ b/drivers/net/ibm_newemac/rgmii.c
@@ -188,11 +188,12 @@ void rgmii_put_mdio(struct of_device *ofdev, int input)
188void rgmii_detach(struct of_device *ofdev, int input) 188void rgmii_detach(struct of_device *ofdev, int input)
189{ 189{
190 struct rgmii_instance *dev = dev_get_drvdata(&ofdev->dev); 190 struct rgmii_instance *dev = dev_get_drvdata(&ofdev->dev);
191 struct rgmii_regs __iomem *p = dev->base; 191 struct rgmii_regs __iomem *p;
192
193 mutex_lock(&dev->lock);
194 192
195 BUG_ON(!dev || dev->users == 0); 193 BUG_ON(!dev || dev->users == 0);
194 p = dev->base;
195
196 mutex_lock(&dev->lock);
196 197
197 RGMII_DBG(dev, "detach(%d)" NL, input); 198 RGMII_DBG(dev, "detach(%d)" NL, input);
198 199