From b1930da08872f6e17b8cdca60ee9c7321a8b5b8c Mon Sep 17 00:00:00 2001 From: Kuninori Morimoto Date: Thu, 8 Dec 2011 18:30:23 -0800 Subject: usb: renesas_usbhs: add usbhsh_is_running() It is possible to judge whether renesas_usbhs driver is running, by checking attch irq mask. This patch adds usbhsh_is_running() to check it. Signed-off-by: Kuninori Morimoto Signed-off-by: Felipe Balbi --- drivers/usb/renesas_usbhs/mod_host.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) (limited to 'drivers/usb/renesas_usbhs') diff --git a/drivers/usb/renesas_usbhs/mod_host.c b/drivers/usb/renesas_usbhs/mod_host.c index c947d0aca9bf..28b2cb3a029a 100644 --- a/drivers/usb/renesas_usbhs/mod_host.c +++ b/drivers/usb/renesas_usbhs/mod_host.c @@ -190,6 +190,21 @@ static void usbhsh_ureq_free(struct usbhsh_hpriv *hpriv, kfree(ureq); } +/* + * status + */ +static int usbhsh_is_running(struct usbhsh_hpriv *hpriv) +{ + /* + * we can decide some device is attached or not + * by checking mod.irq_attch + * see + * usbhsh_irq_attch() + * usbhsh_irq_dtch() + */ + return (hpriv->mod.irq_attch == NULL); +} + /* * pipe control */ @@ -900,6 +915,11 @@ static int usbhsh_urb_enqueue(struct usb_hcd *hcd, dev_dbg(dev, "%s (%s)\n", __func__, is_dir_in ? "in" : "out"); + if (!usbhsh_is_running(hpriv)) { + ret = -EIO; + goto usbhsh_urb_enqueue_error_not_linked; + } + ret = usb_hcd_link_urb_to_ep(hcd, urb); if (ret) goto usbhsh_urb_enqueue_error_not_linked; @@ -1249,6 +1269,12 @@ static int usbhsh_irq_attch(struct usbhs_priv *priv, * attch interrupt might happen infinitely on some device * (on self power USB hub ?) * disable it here. + * + * usbhsh_is_running() becomes effective + * according to this process. + * see + * usbhsh_is_running() + * usbhsh_urb_enqueue() */ hpriv->mod.irq_attch = NULL; usbhs_irq_callback_update(priv, &hpriv->mod); @@ -1269,6 +1295,12 @@ static int usbhsh_irq_dtch(struct usbhs_priv *priv, /* * enable attch interrupt again + * + * usbhsh_is_running() becomes invalid + * according to this process. + * see + * usbhsh_is_running() + * usbhsh_urb_enqueue() */ hpriv->mod.irq_attch = usbhsh_irq_attch; usbhs_irq_callback_update(priv, &hpriv->mod); -- cgit v1.2.3