diff options
Diffstat (limited to 'drivers/usb/renesas_usbhs/mod_host.c')
| -rw-r--r-- | drivers/usb/renesas_usbhs/mod_host.c | 32 |
1 files changed, 32 insertions, 0 deletions
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 @@ -191,6 +191,21 @@ static void usbhsh_ureq_free(struct usbhsh_hpriv *hpriv, } /* + * 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 */ static void usbhsh_endpoint_sequence_save(struct usbhsh_hpriv *hpriv, @@ -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); |