diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/usb/qmi_wwan.c | 49 |
1 files changed, 29 insertions, 20 deletions
diff --git a/drivers/net/usb/qmi_wwan.c b/drivers/net/usb/qmi_wwan.c index 3b206786b5e..c7b9be81ad0 100644 --- a/drivers/net/usb/qmi_wwan.c +++ b/drivers/net/usb/qmi_wwan.c @@ -54,6 +54,13 @@ * corresponding management interface */ +/* driver specific data */ +struct qmi_wwan_state { + struct usb_driver *subdriver; + atomic_t pmcount; + unsigned long unused[3]; +}; + static int qmi_wwan_bind(struct usbnet *dev, struct usb_interface *intf) { int status = -1; @@ -65,9 +72,11 @@ static int qmi_wwan_bind(struct usbnet *dev, struct usb_interface *intf) struct usb_cdc_ether_desc *cdc_ether = NULL; u32 required = 1 << USB_CDC_HEADER_TYPE | 1 << USB_CDC_UNION_TYPE; u32 found = 0; - atomic_t *pmcount = (void *)&dev->data[1]; + struct qmi_wwan_state *info = (void *)&dev->data; + + BUILD_BUG_ON((sizeof(((struct usbnet *)0)->data) < sizeof(struct qmi_wwan_state))); - atomic_set(pmcount, 0); + atomic_set(&info->pmcount, 0); /* * assume a data interface has no additional descriptors and @@ -177,12 +186,12 @@ err: /* using a counter to merge subdriver requests with our own into a combined state */ static int qmi_wwan_manage_power(struct usbnet *dev, int on) { - atomic_t *pmcount = (void *)&dev->data[1]; + struct qmi_wwan_state *info = (void *)&dev->data; int rv = 0; - dev_dbg(&dev->intf->dev, "%s() pmcount=%d, on=%d\n", __func__, atomic_read(pmcount), on); + dev_dbg(&dev->intf->dev, "%s() pmcount=%d, on=%d\n", __func__, atomic_read(&info->pmcount), on); - if ((on && atomic_add_return(1, pmcount) == 1) || (!on && atomic_dec_and_test(pmcount))) { + if ((on && atomic_add_return(1, &info->pmcount) == 1) || (!on && atomic_dec_and_test(&info->pmcount))) { /* need autopm_get/put here to ensure the usbcore sees the new value */ rv = usb_autopm_get_interface(dev->intf); if (rv < 0) @@ -212,7 +221,7 @@ static int qmi_wwan_bind_shared(struct usbnet *dev, struct usb_interface *intf) { int rv; struct usb_driver *subdriver = NULL; - atomic_t *pmcount = (void *)&dev->data[1]; + struct qmi_wwan_state *info = (void *)&dev->data; /* ZTE makes devices where the interface descriptors and endpoint * configurations of two or more interfaces are identical, even @@ -228,7 +237,7 @@ static int qmi_wwan_bind_shared(struct usbnet *dev, struct usb_interface *intf) goto err; } - atomic_set(pmcount, 0); + atomic_set(&info->pmcount, 0); /* collect all three endpoints */ rv = usbnet_get_endpoints(dev, intf); @@ -251,7 +260,7 @@ static int qmi_wwan_bind_shared(struct usbnet *dev, struct usb_interface *intf) dev->status = NULL; /* save subdriver struct for suspend/resume wrappers */ - dev->data[0] = (unsigned long)subdriver; + info->subdriver = subdriver; err: return rv; @@ -282,12 +291,12 @@ err: static void qmi_wwan_unbind_shared(struct usbnet *dev, struct usb_interface *intf) { - struct usb_driver *subdriver = (void *)dev->data[0]; + struct qmi_wwan_state *info = (void *)&dev->data; - if (subdriver && subdriver->disconnect) - subdriver->disconnect(intf); + if (info->subdriver && info->subdriver->disconnect) + info->subdriver->disconnect(intf); - dev->data[0] = (unsigned long)NULL; + info->subdriver = NULL; } /* suspend/resume wrappers calling both usbnet and the cdc-wdm @@ -299,15 +308,15 @@ static void qmi_wwan_unbind_shared(struct usbnet *dev, struct usb_interface *int static int qmi_wwan_suspend(struct usb_interface *intf, pm_message_t message) { struct usbnet *dev = usb_get_intfdata(intf); - struct usb_driver *subdriver = (void *)dev->data[0]; + struct qmi_wwan_state *info = (void *)&dev->data; int ret; ret = usbnet_suspend(intf, message); if (ret < 0) goto err; - if (subdriver && subdriver->suspend) - ret = subdriver->suspend(intf, message); + if (info->subdriver && info->subdriver->suspend) + ret = info->subdriver->suspend(intf, message); if (ret < 0) usbnet_resume(intf); err: @@ -317,16 +326,16 @@ err: static int qmi_wwan_resume(struct usb_interface *intf) { struct usbnet *dev = usb_get_intfdata(intf); - struct usb_driver *subdriver = (void *)dev->data[0]; + struct qmi_wwan_state *info = (void *)&dev->data; int ret = 0; - if (subdriver && subdriver->resume) - ret = subdriver->resume(intf); + if (info->subdriver && info->subdriver->resume) + ret = info->subdriver->resume(intf); if (ret < 0) goto err; ret = usbnet_resume(intf); - if (ret < 0 && subdriver && subdriver->resume && subdriver->suspend) - subdriver->suspend(intf, PMSG_SUSPEND); + if (ret < 0 && info->subdriver && info->subdriver->resume && info->subdriver->suspend) + info->subdriver->suspend(intf, PMSG_SUSPEND); err: return ret; } |