UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

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>
This commit is contained in:
Julia Lawall 2009-07-19 06:13:04 +00:00 committed by David S. Miller
parent acb9c1b2f4
commit 0021195c40
1 changed files with 4 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/net/ibm_newemac/rgmii.c
View File

@ -188,11 +188,12 @@ void rgmii_put_mdio(struct of_device *ofdev, int input)
void rgmii_detach(struct of_device *ofdev, int input)
{
struct rgmii_instance *dev = dev_get_drvdata(&ofdev->dev);
struct rgmii_regs __iomem *p = dev->base;
mutex_lock(&dev->lock);
struct rgmii_regs __iomem *p;
BUG_ON(!dev || dev->users == 0);
p = dev->base;
mutex_lock(&dev->lock);
RGMII_DBG(dev, "detach(%d)" NL, input);