usb: renesas_usbhs: host: add endpoint user counter
renesas_usbhs attaches pipe to endpoint when urb was queued, and it will be
detached when transfer was done. Multi device controlling was enabled by this
behavior.
Now renesas_usbhs driver tried to wait until detaching if urb was queued to
endpoint which already has been attached to pipe, and it created strange driver
behavior.
But it can re-use this attached pipe if multi urb was queued. This patch
implements it.
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 33f7063..73c5039 100644
--- a/drivers/usb/renesas_usbhs/mod_host.c
+++ b/drivers/usb/renesas_usbhs/mod_host.c
@@ -85,6 +85,7 @@
struct usbhsh_device *udev; /* attached udev */
struct usb_host_endpoint *ep;
struct list_head ep_list; /* list to usbhsh_device */
+ unsigned int counter; /* pipe attach counter */
};
#define USBHSH_DEVICE_MAX 10 /* see DEVADDn / DCPMAXP / PIPEMAXP */
@@ -271,8 +272,12 @@
/******************** spin lock ********************/
usbhs_lock(priv, flags);
- if (unlikely(usbhsh_uep_to_pipe(uep))) {
- dev_err(dev, "uep already has pipe\n");
+ /*
+ * if uep has been attached to pipe,
+ * reuse it
+ */
+ if (usbhsh_uep_to_pipe(uep)) {
+ ret = 0;
goto usbhsh_pipe_attach_done;
}
@@ -320,6 +325,9 @@
}
usbhsh_pipe_attach_done:
+ if (0 == ret)
+ uep->counter++;
+
usbhs_unlock(priv, flags);
/******************** spin unlock ******************/
@@ -341,7 +349,7 @@
if (unlikely(!pipe)) {
dev_err(dev, "uep doens't have pipe\n");
- } else {
+ } else if (1 == uep->counter--) { /* last user */
struct usb_host_endpoint *ep = usbhsh_uep_to_ep(uep);
struct usbhsh_device *udev = usbhsh_uep_to_udev(uep);
@@ -386,6 +394,7 @@
/*
* init endpoint
*/
+ uep->counter = 0;
INIT_LIST_HEAD(&uep->ep_list);
list_add_tail(&uep->ep_list, &udev->ep_list_head);
@@ -954,7 +963,6 @@
struct usb_host_endpoint *ep = urb->ep;
struct usbhsh_device *new_udev = NULL;
int is_dir_in = usb_pipein(urb->pipe);
- int i;
int ret;
dev_dbg(dev, "%s (%s)\n", __func__, is_dir_in ? "in" : "out");
@@ -1000,13 +1008,7 @@
* attach pipe to endpoint
* see [image of mod_host]
*/
- for (i = 0; i < 1024; i++) {
- ret = usbhsh_pipe_attach(hpriv, urb);
- if (ret < 0)
- msleep(100);
- else
- break;
- }
+ ret = usbhsh_pipe_attach(hpriv, urb);
if (ret < 0) {
dev_err(dev, "pipe attach failed\n");
goto usbhsh_urb_enqueue_error_free_endpoint;
