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authorMichael Schenk <michael.schenk@albis-elcon.com>2017-01-26 11:25:04 -0600
committerKalle Valo <kvalo@codeaurora.org>2017-01-28 09:11:34 +0200
commit575ddce0507789bf9830d089557d2199d2f91865 (patch)
tree0b6b510f7366085187ac77a91006ecd276232b62
parent64ad08605e8433b86249fef29b671812ccca65a5 (diff)
rtlwifi: rtl_usb: Fix for URB leaking when doing ifconfig up/down
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> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
-rw-r--r--drivers/net/wireless/realtek/rtlwifi/usb.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/net/wireless/realtek/rtlwifi/usb.c b/drivers/net/wireless/realtek/rtlwifi/usb.c
index 20d3fcc19a58..44bdb2bdeeb1 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);
}