Message ID | 20170126172504.17492-1-Larry.Finger@lwfinger.net (mailing list archive) |
---|---|
State | Accepted |
Commit | 575ddce0507789bf9830d089557d2199d2f91865 |
Delegated to: | Kalle Valo |
Headers | show |
Larry Finger <Larry.Finger@lwfinger.net> wrote: > From: Michael Schenk <michael.schenk@albis-elcon.com> > > In the function rtl_usb_start we pre-allocate a certain number of urbs > for RX path but they will not be freed when calling rtl_usb_stop. This > results in leaking urbs when doing ifconfig up and down. Eventually, > the system has no available urbs. > > Signed-off-by: Michael Schenk <michael.schenk@albis-elcon.com> > Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net> > Cc: Stable <stable@vger.kernel.org> Patch applied to wireless-drivers-next.git, thanks. 575ddce05077 rtlwifi: rtl_usb: Fix for URB leaking when doing ifconfig up/down
diff --git a/drivers/net/wireless/realtek/rtlwifi/usb.c b/drivers/net/wireless/realtek/rtlwifi/usb.c index 0bca263..4d989b8 100644 --- a/drivers/net/wireless/realtek/rtlwifi/usb.c +++ b/drivers/net/wireless/realtek/rtlwifi/usb.c @@ -818,12 +818,30 @@ static void rtl_usb_stop(struct ieee80211_hw *hw) struct rtl_priv *rtlpriv = rtl_priv(hw); struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); + struct urb *urb; /* should after adapter start and interrupt enable. */ set_hal_stop(rtlhal); cancel_work_sync(&rtlpriv->works.fill_h2c_cmd); /* Enable software */ SET_USB_STOP(rtlusb); + + /* free pre-allocated URBs from rtl_usb_start() */ + usb_kill_anchored_urbs(&rtlusb->rx_submitted); + + tasklet_kill(&rtlusb->rx_work_tasklet); + cancel_work_sync(&rtlpriv->works.lps_change_work); + + flush_workqueue(rtlpriv->works.rtl_wq); + + skb_queue_purge(&rtlusb->rx_queue); + + while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) { + usb_free_coherent(urb->dev, urb->transfer_buffer_length, + urb->transfer_buffer, urb->transfer_dma); + usb_free_urb(urb); + } + rtlpriv->cfg->ops->hw_disable(hw); }