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usb: otg: move the dereference below the NULL test 

The dereference should be moved below the NULL test.

spatch with a semantic match is used to found this.
(http://coccinelle.lip6.fr/)

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Wei Yongjun 2012-09-10 12:42:31 +08:00 committed by Felipe Balbi
parent c9e4412ab8
commit 58add6ca84
1 changed files with 24 additions and 10 deletions
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34
drivers/usb/otg/fsl_otg.c
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@ -544,9 +544,13 @@ int fsl_otg_start_gadget(struct otg_fsm *fsm, int on)
*/
static int fsl_otg_set_host(struct usb_otg *otg, struct usb_bus *host)
{
struct fsl_otg *otg_dev = container_of(otg->phy, struct fsl_otg, phy);
struct fsl_otg *otg_dev;
if (!otg || otg_dev != fsl_otg_dev)
if (!otg)
return -ENODEV;
otg_dev = container_of(otg->phy, struct fsl_otg, phy);
if (otg_dev != fsl_otg_dev)
return -ENODEV;
otg->host = host;
@ -590,12 +594,15 @@ static int fsl_otg_set_host(struct usb_otg *otg, struct usb_bus *host)
static int fsl_otg_set_peripheral(struct usb_otg *otg,
struct usb_gadget *gadget)
{
struct fsl_otg *otg_dev = container_of(otg->phy, struct fsl_otg, phy);
struct fsl_otg *otg_dev;
if (!otg)
return -ENODEV;
otg_dev = container_of(otg->phy, struct fsl_otg, phy);
VDBG("otg_dev 0x%x\n", (int)otg_dev);
VDBG("fsl_otg_dev 0x%x\n", (int)fsl_otg_dev);
if (!otg || otg_dev != fsl_otg_dev)
if (otg_dev != fsl_otg_dev)
return -ENODEV;
if (!gadget) {
@ -660,10 +667,13 @@ static void fsl_otg_event(struct work_struct *work)
/* B-device start SRP */
static int fsl_otg_start_srp(struct usb_otg *otg)
{
struct fsl_otg *otg_dev = container_of(otg->phy, struct fsl_otg, phy);
struct fsl_otg *otg_dev;
if (!otg || otg_dev != fsl_otg_dev
|| otg->phy->state != OTG_STATE_B_IDLE)
if (!otg || otg->phy->state != OTG_STATE_B_IDLE)
return -ENODEV;
otg_dev = container_of(otg->phy, struct fsl_otg, phy);
if (otg_dev != fsl_otg_dev)
return -ENODEV;
otg_dev->fsm.b_bus_req = 1;
@ -675,9 +685,13 @@ static int fsl_otg_start_srp(struct usb_otg *otg)
/* A_host suspend will call this function to start hnp */
static int fsl_otg_start_hnp(struct usb_otg *otg)
{
struct fsl_otg *otg_dev = container_of(otg->phy, struct fsl_otg, phy);
struct fsl_otg *otg_dev;
if (!otg || otg_dev != fsl_otg_dev)
if (!otg)
return -ENODEV;
otg_dev = container_of(otg->phy, struct fsl_otg, phy);
if (otg_dev != fsl_otg_dev)
return -ENODEV;
DBG("start_hnp...n");