On Mon, Jun 10, 2013 at 08:55:56AM +0200, Oleksij Rempel wrote:
> Hello all,
>
> i'm working on usb_autosuspend for ath9k_htc and triggered this
> oops. Currently i do not know if real bug is in ath9k_htc or in
> xhci. Same adapter with same kernel and my patches work fine on ehci
> host... so may be it is xhci.
Which kernel version is this oops on? I suspect it's an xHCI issue.
Please turn on CONFIG_USB_XHCI_HCD_DEBUGGING and CONFIG_USB_DEBUG and
send me dmesg, from the beginning of connecting the device to when it is
suspended and then resumed. That will be a lot of output, so feel free
to compress it.
Sarah Sharp
> i get oops on this line:
> 426 static void ring_doorbell_for_active_rings(struct xhci_hcd *xhci,
> 427 unsigned int slot_id,
> 428 unsigned int ep_index)
> 429 {
> 430 unsigned int stream_id;
> 431 struct xhci_virt_ep *ep;
> 432
> 433 ep = &xhci->devs[slot_id]->eps[ep_index];
> ^^^ ^^^^^^^^^^^^^^^^^^^^^^^
>
> changes for ath9k_htc are in attachment and photo of oops here:
> https://plus.google.com/u/0/102032716864870215256/posts/a9d8nFsLhYK
> --
> Regards,
> Oleksij
> diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.c
> b/drivers/net/wireless/ath/ath9k/hif_usb.c
> index f5dda84..3d74575 100644
> --- a/drivers/net/wireless/ath/ath9k/hif_usb.c
> +++ b/drivers/net/wireless/ath/ath9k/hif_usb.c
> @@ -1368,6 +1368,7 @@ static struct usb_driver ath9k_hif_usb_driver = {
> .suspend = ath9k_hif_usb_suspend,
> .resume = ath9k_hif_usb_resume,
> .reset_resume = ath9k_hif_usb_resume,
> + .supports_autosuspend = 1,
> #endif
> .id_table = ath9k_hif_usb_ids,
> .soft_unbind = 1,
> diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_main.c
> b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
> index 0743a47..20be8a1 100644
> --- a/drivers/net/wireless/ath/ath9k/htc_drv_main.c
> +++ b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
> @@ -905,6 +905,7 @@ static int ath9k_htc_start(struct ieee80211_hw *hw)
> struct ath_hw *ah = priv->ah;
> struct ath_common *common = ath9k_hw_common(ah);
> struct ieee80211_channel *curchan = hw->conf.chandef.chan;
> + struct hif_device_usb *hif_dev = priv->htc->hif_dev;
> struct ath9k_channel *init_channel;
> int ret = 0;
> enum htc_phymode mode;
> @@ -917,6 +918,14 @@ static int ath9k_htc_start(struct ieee80211_hw *hw)
> "Starting driver with initial channel: %d MHz\n",
> curchan->center_freq);
>
> + ret = usb_autopm_get_interface(hif_dev->interface);
> + if (ret < 0) {
> + ath_err(common,
> + "Unable wake up hardware\n");
> + mutex_unlock(&priv->mutex);
> + return ret;
> + }
> +
> /* Ensure that HW is awake before flushing RX */
> ath9k_htc_setpower(priv, ATH9K_PM_AWAKE);
> WMI_CMD(WMI_FLUSH_RECV_CMDID);
> @@ -972,6 +981,7 @@ static void ath9k_htc_stop(struct ieee80211_hw *hw)
> {
> struct ath9k_htc_priv *priv = hw->priv;
> struct ath_hw *ah = priv->ah;
> + struct hif_device_usb *hif_dev = priv->htc->hif_dev;
> struct ath_common *common = ath9k_hw_common(ah);
> int ret __attribute__ ((unused));
> u8 cmd_rsp;
> @@ -1022,6 +1032,8 @@ static void ath9k_htc_stop(struct ieee80211_hw *hw)
>
> set_bit(OP_INVALID, &priv->op_flags);
>
> + usb_autopm_put_interface(hif_dev->interface);
> +
> ath_dbg(common, CONFIG, "Driver halt\n");
> mutex_unlock(&priv->mutex);
> }
>
--
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