diff options
author | Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | 2012-11-06 00:11:53 -0800 |
---|---|---|
committer | Felipe Balbi <balbi@ti.com> | 2012-11-06 15:04:28 +0200 |
commit | 7b332e5fef480ee14d133d9b83af22d03819368e (patch) | |
tree | d9720f428f53b4038de082815e0089f7e0c250a2 | |
parent | 24e4c1c30da3926db547aab4ec873afdc60bd3ee (diff) |
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>
-rw-r--r-- | drivers/usb/renesas_usbhs/mod_host.c | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/drivers/usb/renesas_usbhs/mod_host.c b/drivers/usb/renesas_usbhs/mod_host.c index 33f70638723..73c5039f767 100644 --- a/drivers/usb/renesas_usbhs/mod_host.c +++ b/drivers/usb/renesas_usbhs/mod_host.c @@ -85,6 +85,7 @@ struct usbhsh_ep { 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 @@ static int usbhsh_pipe_attach(struct usbhsh_hpriv *hpriv, /******************** 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 @@ static int usbhsh_pipe_attach(struct usbhsh_hpriv *hpriv, } usbhsh_pipe_attach_done: + if (0 == ret) + uep->counter++; + usbhs_unlock(priv, flags); /******************** spin unlock ******************/ @@ -341,7 +349,7 @@ static void usbhsh_pipe_detach(struct usbhsh_hpriv *hpriv, 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 @@ static int usbhsh_endpoint_attach(struct usbhsh_hpriv *hpriv, /* * 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 @@ static int usbhsh_urb_enqueue(struct usb_hcd *hcd, 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 @@ static int usbhsh_urb_enqueue(struct usb_hcd *hcd, * 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; |