usb: gadget: renesas_usbhs: adds spin lock area on mod_host
spin lock was needed in mod_host.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/renesas_usbhs/mod_host.c b/drivers/usb/renesas_usbhs/mod_host.c
index e6fd044..1816a3e 100644
--- a/drivers/usb/renesas_usbhs/mod_host.c
+++ b/drivers/usb/renesas_usbhs/mod_host.c
@@ -228,9 +228,13 @@
struct device *dev = usbhsh_hcd_to_dev(hcd);
struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+ unsigned long flags;
u16 upphub, hubport;
int i;
+ /******************** spin lock ********************/
+ usbhs_lock(priv, flags);
+
/*
* find device
*/
@@ -255,6 +259,19 @@
}
}
+ if (udev) {
+ /*
+ * usbhsh_usbv_to_udev()
+ * usbhsh_udev_to_usbv()
+ * will be enable
+ */
+ dev_set_drvdata(&usbv->dev, udev);
+ udev->usbv = usbv;
+ }
+
+ usbhs_unlock(priv, flags);
+ /******************** spin unlock ******************/
+
if (!udev) {
dev_err(dev, "no free usbhsh_device\n");
return NULL;
@@ -266,14 +283,6 @@
/* uep will be attached */
INIT_LIST_HEAD(&udev->ep_list_head);
- /*
- * usbhsh_usbv_to_udev()
- * usbhsh_udev_to_usbv()
- * will be enable
- */
- dev_set_drvdata(&usbv->dev, udev);
- udev->usbv = usbv;
-
upphub = 0;
hubport = 0;
if (!usbhsh_connected_to_rhdev(hcd, udev)) {
@@ -302,8 +311,10 @@
struct usbhsh_device *udev)
{
struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
+ struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
struct device *dev = usbhsh_hcd_to_dev(hcd);
struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
+ unsigned long flags;
dev_dbg(dev, "%s [%d](%p)\n", __func__,
usbhsh_device_number(hpriv, udev), udev);
@@ -311,6 +322,9 @@
if (usbhsh_device_has_endpoint(udev))
dev_warn(dev, "udev still have endpoint\n");
+ /******************** spin lock ********************/
+ usbhs_lock(priv, flags);
+
/*
* usbhsh_usbv_to_udev()
* usbhsh_udev_to_usbv()
@@ -318,6 +332,9 @@
*/
dev_set_drvdata(&usbv->dev, NULL);
udev->usbv = NULL;
+
+ usbhs_unlock(priv, flags);
+ /******************** spin unlock ******************/
}
/*
@@ -338,6 +355,7 @@
struct usb_endpoint_descriptor *desc = &ep->desc;
int type, i, dir_in;
unsigned int min_usr;
+ unsigned long flags;
dir_in_req = !!dir_in_req;
@@ -352,6 +370,9 @@
goto usbhsh_endpoint_alloc_find_pipe;
}
+ /******************** spin lock ********************/
+ usbhs_lock(priv, flags);
+
/*
* find best pipe for endpoint
* see
@@ -376,6 +397,19 @@
}
}
+ if (best_pipe) {
+ /* update pipe user count */
+ info = usbhsh_pipe_info(best_pipe);
+ info->usr_cnt++;
+
+ /* init this endpoint, and attach it to udev */
+ INIT_LIST_HEAD(&uep->ep_list);
+ list_add_tail(&uep->ep_list, &udev->ep_list_head);
+ }
+
+ usbhs_unlock(priv, flags);
+ /******************** spin unlock ******************/
+
if (unlikely(!best_pipe)) {
dev_err(dev, "couldn't find best pipe\n");
kfree(uep);
@@ -391,16 +425,6 @@
usbhsh_ep_to_uep(ep) = uep;
/*
- * update pipe user count
- */
- info = usbhsh_pipe_info(best_pipe);
- info->usr_cnt++;
-
- /* init this endpoint, and attach it to udev */
- INIT_LIST_HEAD(&uep->ep_list);
- list_add_tail(&uep->ep_list, &udev->ep_list_head);
-
- /*
* usbhs_pipe_config_update() should be called after
* usbhs_set_device_config()
* see
@@ -426,6 +450,7 @@
struct device *dev = usbhs_priv_to_dev(priv);
struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
struct usbhsh_pipe_info *info;
+ unsigned long flags;
if (!uep)
return;
@@ -434,6 +459,9 @@
usbhsh_device_number(hpriv, usbhsh_uep_to_udev(uep)),
usbhs_pipe_name(uep->pipe), uep);
+ /******************** spin lock ********************/
+ usbhs_lock(priv, flags);
+
info = usbhsh_pipe_info(uep->pipe);
info->usr_cnt--;
@@ -443,6 +471,9 @@
usbhsh_uep_to_udev(uep) = NULL;
usbhsh_ep_to_uep(ep) = NULL;
+ usbhs_unlock(priv, flags);
+ /******************** spin unlock ******************/
+
kfree(uep);
}