Return-path: Received: from mail.atheros.com ([12.36.123.2]:22584 "EHLO mail.atheros.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752482Ab0DFJhs (ORCPT ); Tue, 6 Apr 2010 05:37:48 -0400 Received: from mail.atheros.com ([10.10.20.108]) by sidewinder.atheros.com for ; Tue, 06 Apr 2010 02:37:48 -0700 From: Sujith MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Message-ID: <19387.1465.547642.713923@gargle.gargle.HOWL> Date: Tue, 6 Apr 2010 15:28:17 +0530 To: CC: Subject: [PATCH 4/5] ath9k_htc: Use anchors for REGOUT pipe Sender: linux-wireless-owner@vger.kernel.org List-ID: hif_usb_regout_cb() frees the given URB, which is borked by design. Use an anchor to simplify URB management. Signed-off-by: Sujith --- drivers/net/wireless/ath/ath9k/hif_usb.c | 30 ++++++++++++++---------------- drivers/net/wireless/ath/ath9k/hif_usb.h | 1 + 2 files changed, 15 insertions(+), 16 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.c b/drivers/net/wireless/ath/ath9k/hif_usb.c index 69bef1d..e2117e7 100644 --- a/drivers/net/wireless/ath/ath9k/hif_usb.c +++ b/drivers/net/wireless/ath/ath9k/hif_usb.c @@ -32,27 +32,15 @@ static int __hif_usb_tx(struct hif_device_usb *hif_dev); static void hif_usb_regout_cb(struct urb *urb) { struct cmd_buf *cmd = (struct cmd_buf *)urb->context; - struct hif_device_usb *hif_dev = cmd->hif_dev; - - if (!hif_dev) { - usb_free_urb(urb); - if (cmd) { - if (cmd->skb) - dev_kfree_skb_any(cmd->skb); - kfree(cmd); - } - return; - } switch (urb->status) { case 0: break; case -ENOENT: case -ECONNRESET: - break; case -ENODEV: case -ESHUTDOWN: - return; + goto free; default: break; } @@ -61,8 +49,12 @@ static void hif_usb_regout_cb(struct urb *urb) ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle, cmd->skb, 1); kfree(cmd); - usb_free_urb(urb); } + + return; +free: + dev_kfree_skb_any(cmd->skb); + kfree(cmd); } static int hif_usb_send_regout(struct hif_device_usb *hif_dev, @@ -90,11 +82,13 @@ static int hif_usb_send_regout(struct hif_device_usb *hif_dev, skb->data, skb->len, hif_usb_regout_cb, cmd, 1); + usb_anchor_urb(urb, &hif_dev->regout_submitted); ret = usb_submit_urb(urb, GFP_KERNEL); if (ret) { - usb_free_urb(urb); + usb_unanchor_urb(urb); kfree(cmd); } + usb_free_urb(urb); return ret; } @@ -711,6 +705,9 @@ err: static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev) { + /* Register Write */ + init_usb_anchor(&hif_dev->regout_submitted); + /* TX */ if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0) goto err; @@ -719,7 +716,7 @@ static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev) if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0) goto err; - /* Register Read/Write */ + /* Register Read */ if (ath9k_hif_usb_alloc_reg_in_urb(hif_dev) < 0) goto err; @@ -816,6 +813,7 @@ err_fw_req: static void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev) { + usb_kill_anchored_urbs(&hif_dev->regout_submitted); ath9k_hif_usb_dealloc_reg_in_urb(hif_dev); ath9k_hif_usb_dealloc_tx_urbs(hif_dev); ath9k_hif_usb_dealloc_rx_urbs(hif_dev); diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.h b/drivers/net/wireless/ath/ath9k/hif_usb.h index 179cea4..7d49a8a 100644 --- a/drivers/net/wireless/ath/ath9k/hif_usb.h +++ b/drivers/net/wireless/ath/ath9k/hif_usb.h @@ -88,6 +88,7 @@ struct hif_device_usb { struct htc_target *htc_handle; struct hif_usb_tx tx; struct urb *reg_in_urb; + struct usb_anchor regout_submitted; struct usb_anchor rx_submitted; struct sk_buff *remain_skb; int rx_remain_len; -- 1.7.0.3