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Staging: go7007: Move a dereference below a NULL test

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In each case, if the NULL test is necessary, then the dereference should be
moved below the NULL test.

The semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/).  The result has been modified to
move the initialization of usb down closer to where it is used.

// <smpl>
@@
type T;
expression E;
identifier i,fld;
statement S;
@@

- T i = E->fld;
+ T i;
  ... when != E
      when != i
  if (E == NULL) S
+ i = E->fld;
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Julia Lawall 2008-12-19 18:11:25 +01:00 committed by Greg Kroah-Hartman
parent fd1f72b182
commit 41e847890a
1 changed files with 4 additions and 2 deletions
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6
drivers/staging/go7007/s2250-board.c
View file

@ -149,7 +149,7 @@ static int go7007_usb_vendor_request(struct go7007 *go, u16 request,
static int write_reg(struct i2c_client *client, u8 reg, u8 value)
{
struct go7007 *go = i2c_get_adapdata(client->adapter);
struct go7007_usb *usb = go->hpi_context;
struct go7007_usb *usb;
int rc;
int dev_addr = client->addr;
u8 *buf;
@ -164,6 +164,7 @@ static int write_reg(struct i2c_client *client, u8 reg, u8 value)
if (buf == NULL)
return -ENOMEM;
usb = go->hpi_context;
if (down_interruptible(&usb->i2c_lock) != 0) {
printk(KERN_INFO "i2c lock failed\n");
return -EINTR;
@ -181,7 +182,7 @@ static int write_reg(struct i2c_client *client, u8 reg, u8 value)
static int write_reg_fp(struct i2c_client *client, u16 addr, u16 val)
{
struct go7007 *go = i2c_get_adapdata(client->adapter);
struct go7007_usb *usb = go->hpi_context;
struct go7007_usb *usb;
u8 *buf;
struct s2250 *dec = i2c_get_clientdata(client);
@ -200,6 +201,7 @@ static int write_reg_fp(struct i2c_client *client, u16 addr, u16 val)
memset(buf, 0xcd, 6);
usb = go->hpi_context;
if (down_interruptible(&usb->i2c_lock) != 0) {
printk(KERN_INFO "i2c lock failed\n");
return -EINTR;