From patchwork Tue May 11 21:51:45 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gertjan van Wingerde X-Patchwork-Id: 98841 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.3) with ESMTP id o4BLq8SK031272 for ; Tue, 11 May 2010 21:52:08 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752882Ab0EKVv6 (ORCPT ); Tue, 11 May 2010 17:51:58 -0400 Received: from cpsmtpb-ews02.kpnxchange.com ([213.75.39.5]:1471 "EHLO cpsmtpb-ews02.kpnxchange.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752346Ab0EKVvx (ORCPT ); Tue, 11 May 2010 17:51:53 -0400 Received: from cpbrm-ews25.kpnxchange.com ([10.94.84.156]) by cpsmtpb-ews02.kpnxchange.com with Microsoft SMTPSVC(6.0.3790.3959); Tue, 11 May 2010 23:51:49 +0200 Received: from CPSMTPM-EML110.kpnxchange.com ([195.121.3.14]) by cpbrm-ews25.kpnxchange.com with Microsoft SMTPSVC(6.0.3790.3959); Tue, 11 May 2010 23:51:48 +0200 Received: from wingerd.gvw.nl ([86.87.118.224]) by CPSMTPM-EML110.kpnxchange.com with Microsoft SMTPSVC(7.0.6001.18000); Tue, 11 May 2010 23:51:48 +0200 Received: by wingerd.gvw.nl (Postfix, from userid 501) id 0113A60038; Tue, 11 May 2010 23:51:47 +0200 (CEST) From: Gertjan van Wingerde To: "John W. Linville" Cc: Ivo van Doorn , , , Gertjan van Wingerde Subject: [PATCH 9/9] rt2x00: Properly reserve room for descriptors in skbs. Date: Tue, 11 May 2010 23:51:45 +0200 Message-Id: <1273614705-25118-10-git-send-email-gwingerde@gmail.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1273614705-25118-1-git-send-email-gwingerde@gmail.com> References: <1273614705-25118-1-git-send-email-gwingerde@gmail.com> X-OriginalArrivalTime: 11 May 2010 21:51:48.0778 (UTC) FILETIME=[2837E8A0:01CAF154] X-RecipientDomain: vger.kernel.org Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Tue, 11 May 2010 21:52:08 +0000 (UTC) diff --git a/drivers/net/wireless/rt2x00/rt2400pci.c b/drivers/net/wireless/rt2x00/rt2400pci.c index 741c531..38ee78b 100644 --- a/drivers/net/wireless/rt2x00/rt2400pci.c +++ b/drivers/net/wireless/rt2x00/rt2400pci.c @@ -1228,7 +1228,7 @@ static void rt2400pci_txdone(struct rt2x00_dev *rt2x00dev, } txdesc.retry = rt2x00_get_field32(word, TXD_W0_RETRY_COUNT); - rt2x00lib_txdone(entry, &txdesc); + rt2x00pci_txdone(entry, &txdesc); } } diff --git a/drivers/net/wireless/rt2x00/rt2500pci.c b/drivers/net/wireless/rt2x00/rt2500pci.c index 4dc101e..cc7091c 100644 --- a/drivers/net/wireless/rt2x00/rt2500pci.c +++ b/drivers/net/wireless/rt2x00/rt2500pci.c @@ -1364,7 +1364,7 @@ static void rt2500pci_txdone(struct rt2x00_dev *rt2x00dev, } txdesc.retry = rt2x00_get_field32(word, TXD_W0_RETRY_COUNT); - rt2x00lib_txdone(entry, &txdesc); + rt2x00pci_txdone(entry, &txdesc); } } diff --git a/drivers/net/wireless/rt2x00/rt2500usb.c b/drivers/net/wireless/rt2x00/rt2500usb.c index 4911d1a..b6ccb57 100644 --- a/drivers/net/wireless/rt2x00/rt2500usb.c +++ b/drivers/net/wireless/rt2x00/rt2500usb.c @@ -1034,7 +1034,7 @@ static void rt2500usb_write_tx_desc(struct rt2x00_dev *rt2x00dev, struct txentry_desc *txdesc) { struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb); - __le32 *txd = (__le32 *)(skb->data - TXD_DESC_SIZE); + __le32 *txd = (__le32 *) skb->data; u32 word; /* @@ -1080,6 +1080,7 @@ static void rt2500usb_write_tx_desc(struct rt2x00_dev *rt2x00dev, /* * Register descriptor details in skb frame descriptor. */ + skbdesc->flags |= SKBDESC_DESC_IN_SKB; skbdesc->desc = txd; skbdesc->desc_len = TXD_DESC_SIZE; } @@ -1108,6 +1109,12 @@ static void rt2500usb_write_beacon(struct queue_entry *entry, rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg); /* + * Add space for the descriptor in front of the skb. + */ + skb_push(entry->skb, TXD_DESC_SIZE); + memset(entry->skb->data, 0, TXD_DESC_SIZE); + + /* * Write the TX descriptor for the beacon. */ rt2500usb_write_tx_desc(rt2x00dev, entry->skb, txdesc); @@ -1118,11 +1125,6 @@ static void rt2500usb_write_beacon(struct queue_entry *entry, rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_BEACON, entry->skb); /* - * Take the descriptor in front of the skb into account. - */ - skb_push(entry->skb, TXD_DESC_SIZE); - - /* * USB devices cannot blindly pass the skb->len as the * length of the data to usb_fill_bulk_urb. Pass the skb * to the driver to determine what the length should be. diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c index 7410ac1..53a3257 100644 --- a/drivers/net/wireless/rt2x00/rt2800lib.c +++ b/drivers/net/wireless/rt2x00/rt2800lib.c @@ -281,9 +281,8 @@ int rt2800_wait_wpdma_ready(struct rt2x00_dev *rt2x00dev) } EXPORT_SYMBOL_GPL(rt2800_wait_wpdma_ready); -void rt2800_write_txwi(struct sk_buff *skb, struct txentry_desc *txdesc) +void rt2800_write_txwi(__le32 *txwi, struct txentry_desc *txdesc) { - __le32 *txwi = (__le32 *)(skb->data - TXWI_DESC_SIZE); u32 word; /* diff --git a/drivers/net/wireless/rt2x00/rt2800lib.h b/drivers/net/wireless/rt2x00/rt2800lib.h index 94de999..0f0a13c 100644 --- a/drivers/net/wireless/rt2x00/rt2800lib.h +++ b/drivers/net/wireless/rt2x00/rt2800lib.h @@ -111,7 +111,7 @@ void rt2800_mcu_request(struct rt2x00_dev *rt2x00dev, const u8 command, const u8 token, const u8 arg0, const u8 arg1); -void rt2800_write_txwi(struct sk_buff *skb, struct txentry_desc *txdesc); +void rt2800_write_txwi(__le32 *txwi, struct txentry_desc *txdesc); void rt2800_process_rxwi(struct sk_buff *skb, struct rxdone_entry_desc *txdesc); extern const struct rt2x00debug rt2800_rt2x00debug; diff --git a/drivers/net/wireless/rt2x00/rt2800pci.c b/drivers/net/wireless/rt2x00/rt2800pci.c index bbd6481..86f7042 100644 --- a/drivers/net/wireless/rt2x00/rt2800pci.c +++ b/drivers/net/wireless/rt2x00/rt2800pci.c @@ -617,7 +617,7 @@ static int rt2800pci_set_device_state(struct rt2x00_dev *rt2x00dev, static void rt2800pci_add_tx_datadesc(struct queue_entry* entry, struct txentry_desc *txdesc) { - rt2800_write_txwi(entry->skb, txdesc); + rt2800_write_txwi((__le32 *) entry->skb->data, txdesc); } @@ -694,15 +694,22 @@ static void rt2800pci_write_beacon(struct queue_entry *entry, rt2800_register_write(rt2x00dev, BCN_TIME_CFG, reg); /* + * Add space for the TXWI in front of the skb. + */ + skb_push(entry->skb, TXWI_DESC_SIZE); + memset(entry->skb, 0, TXWI_DESC_SIZE); + + /* * Register descriptor details in skb frame descriptor. */ - skbdesc->desc = entry->skb->data - TXWI_DESC_SIZE; + skbdesc->flags |= SKBDESC_DESC_IN_SKB; + skbdesc->desc = entry->skb->data; skbdesc->desc_len = TXWI_DESC_SIZE; /* * Add the TXWI for the beacon to the skb. */ - rt2800_write_txwi(entry->skb, txdesc); + rt2800_write_txwi((__le32 *)entry->skb->data, txdesc); /* * Dump beacon to userspace through debugfs. @@ -710,11 +717,6 @@ static void rt2800pci_write_beacon(struct queue_entry *entry, rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_BEACON, entry->skb); /* - * Adjust skb to take TXWI into account. - */ - skb_push(entry->skb, TXWI_DESC_SIZE); - - /* * Write entire beacon with TXWI to register. */ beacon_base = HW_BEACON_OFFSET(entry->entry_idx); @@ -889,8 +891,7 @@ static void rt2800pci_txdone(struct rt2x00_dev *rt2x00dev) /* Check if we got a match by looking at WCID/ACK/PID * fields */ - txwi = (__le32 *)(entry->skb->data - - rt2x00dev->ops->extra_tx_headroom); + txwi = (__le32 *) entry->skb->data; rt2x00_desc_read(txwi, 1, &word); tx_wcid = rt2x00_get_field32(word, TXWI_W1_WIRELESS_CLI_ID); @@ -935,7 +936,7 @@ static void rt2800pci_txdone(struct rt2x00_dev *rt2x00dev) __set_bit(TXDONE_FALLBACK, &txdesc.flags); - rt2x00lib_txdone(entry, &txdesc); + rt2x00pci_txdone(entry, &txdesc); } } diff --git a/drivers/net/wireless/rt2x00/rt2800usb.c b/drivers/net/wireless/rt2x00/rt2800usb.c index 9a29f73..a8e6e71 100644 --- a/drivers/net/wireless/rt2x00/rt2800usb.c +++ b/drivers/net/wireless/rt2x00/rt2800usb.c @@ -401,13 +401,14 @@ static void rt2800usb_write_tx_desc(struct rt2x00_dev *rt2x00dev, struct txentry_desc *txdesc) { struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb); - __le32 *txi = (__le32 *)(skb->data - TXWI_DESC_SIZE - TXINFO_DESC_SIZE); + __le32 *txi = (__le32 *) skb->data; + __le32 *txwi = (__le32 *) (skb->data + TXINFO_DESC_SIZE); u32 word; /* * Initialize TXWI descriptor */ - rt2800_write_txwi(skb, txdesc); + rt2800_write_txwi(txwi, txdesc); /* * Initialize TXINFO descriptor @@ -427,6 +428,7 @@ static void rt2800usb_write_tx_desc(struct rt2x00_dev *rt2x00dev, /* * Register descriptor details in skb frame descriptor. */ + skbdesc->flags |= SKBDESC_DESC_IN_SKB; skbdesc->desc = txi; skbdesc->desc_len = TXINFO_DESC_SIZE + TXWI_DESC_SIZE; } @@ -451,15 +453,22 @@ static void rt2800usb_write_beacon(struct queue_entry *entry, rt2800_register_write(rt2x00dev, BCN_TIME_CFG, reg); /* + * Add space for the TXWI in front of the skb. + */ + skb_push(entry->skb, TXWI_DESC_SIZE); + memset(entry->skb, 0, TXWI_DESC_SIZE); + + /* * Register descriptor details in skb frame descriptor. */ - skbdesc->desc = entry->skb->data - TXWI_DESC_SIZE; + skbdesc->flags |= SKBDESC_DESC_IN_SKB; + skbdesc->desc = entry->skb->data; skbdesc->desc_len = TXWI_DESC_SIZE; /* * Add the TXWI for the beacon to the skb. */ - rt2800_write_txwi(entry->skb, txdesc); + rt2800_write_txwi((__le32 *) entry->skb->data, txdesc); /* * Dump beacon to userspace through debugfs. @@ -467,11 +476,6 @@ static void rt2800usb_write_beacon(struct queue_entry *entry, rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_BEACON, entry->skb); /* - * Adjust skb to take TXWI into account. - */ - skb_push(entry->skb, TXWI_DESC_SIZE); - - /* * Write entire beacon with descriptor to register. */ beacon_base = HW_BEACON_OFFSET(entry->entry_idx); diff --git a/drivers/net/wireless/rt2x00/rt2x00.h b/drivers/net/wireless/rt2x00/rt2x00.h index 5f2531f..4cb9f87 100644 --- a/drivers/net/wireless/rt2x00/rt2x00.h +++ b/drivers/net/wireless/rt2x00/rt2x00.h @@ -1001,6 +1001,13 @@ static inline bool rt2x00_is_soc(struct rt2x00_dev *rt2x00dev) void rt2x00queue_map_txskb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb); /** + * rt2x00queue_unmap_skb - Unmap a skb from DMA. + * @rt2x00dev: Pointer to &struct rt2x00_dev. + * @skb: The skb to unmap. + */ +void rt2x00queue_unmap_skb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb); + +/** * rt2x00queue_get_queue - Convert queue index to queue pointer * @rt2x00dev: Pointer to &struct rt2x00_dev. * @queue: rt2x00 queue index (see &enum data_queue_qid). diff --git a/drivers/net/wireless/rt2x00/rt2x00dev.c b/drivers/net/wireless/rt2x00/rt2x00dev.c index 33c2f5f..6790441 100644 --- a/drivers/net/wireless/rt2x00/rt2x00dev.c +++ b/drivers/net/wireless/rt2x00/rt2x00dev.c @@ -210,11 +210,6 @@ void rt2x00lib_txdone(struct queue_entry *entry, bool success; /* - * Unmap the skb. - */ - rt2x00queue_unmap_skb(rt2x00dev, entry->skb); - - /* * Remove L2 padding which was added during */ if (test_bit(DRIVER_REQUIRE_L2PAD, &rt2x00dev->flags)) diff --git a/drivers/net/wireless/rt2x00/rt2x00lib.h b/drivers/net/wireless/rt2x00/rt2x00lib.h index be2e37f..2bffc51 100644 --- a/drivers/net/wireless/rt2x00/rt2x00lib.h +++ b/drivers/net/wireless/rt2x00/rt2x00lib.h @@ -107,13 +107,6 @@ struct sk_buff *rt2x00queue_alloc_rxskb(struct rt2x00_dev *rt2x00dev, struct queue_entry *entry); /** - * rt2x00queue_unmap_skb - Unmap a skb from DMA. - * @rt2x00dev: Pointer to &struct rt2x00_dev. - * @skb: The skb to unmap. - */ -void rt2x00queue_unmap_skb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb); - -/** * rt2x00queue_free_skb - free a skb * @rt2x00dev: Pointer to &struct rt2x00_dev. * @skb: The skb to free. diff --git a/drivers/net/wireless/rt2x00/rt2x00pci.c b/drivers/net/wireless/rt2x00/rt2x00pci.c index cd61d6f..e474629 100644 --- a/drivers/net/wireless/rt2x00/rt2x00pci.c +++ b/drivers/net/wireless/rt2x00/rt2x00pci.c @@ -81,11 +81,23 @@ int rt2x00pci_write_tx_data(struct queue_entry *entry, } /* + * Add the requested extra tx headroom in front of the skb. + */ + skb_push(entry->skb, rt2x00dev->ops->extra_tx_headroom); + memset(entry->skb->data, 0, rt2x00dev->ops->extra_tx_headroom); + + /* * Call the driver's add_tx_datadesc function, if it exists. */ if (rt2x00dev->ops->lib->add_tx_datadesc) rt2x00dev->ops->lib->add_tx_datadesc(entry, txdesc); + /* + * Map the skb to DMA. + */ + if (test_bit(DRIVER_REQUIRE_DMA, &rt2x00dev->flags)) + rt2x00queue_map_txskb(rt2x00dev, entry->skb); + return 0; } EXPORT_SYMBOL_GPL(rt2x00pci_write_tx_data); @@ -93,6 +105,34 @@ EXPORT_SYMBOL_GPL(rt2x00pci_write_tx_data); /* * TX/RX data handlers. */ +void rt2x00pci_txdone(struct queue_entry *entry, + struct txdone_entry_desc *txdesc) +{ + struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; + struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb); + + /* + * Unmap the skb. + */ + rt2x00queue_unmap_skb(rt2x00dev, entry->skb); + + /* + * Remove the extra tx headroom from the skb. + */ + skb_pull(entry->skb, rt2x00dev->ops->extra_tx_headroom); + + /* + * Signal that the TX descriptor is no longer in the skb. + */ + skbdesc->flags &= ~SKBDESC_DESC_IN_SKB; + + /* + * Pass on to rt2x00lib. + */ + rt2x00lib_txdone(entry, txdesc); +} +EXPORT_SYMBOL_GPL(rt2x00pci_txdone); + void rt2x00pci_rxdone(struct rt2x00_dev *rt2x00dev) { struct data_queue *queue = rt2x00dev->rx; diff --git a/drivers/net/wireless/rt2x00/rt2x00pci.h b/drivers/net/wireless/rt2x00/rt2x00pci.h index 51bcef3..00528b8 100644 --- a/drivers/net/wireless/rt2x00/rt2x00pci.h +++ b/drivers/net/wireless/rt2x00/rt2x00pci.h @@ -109,6 +109,14 @@ struct queue_entry_priv_pci { }; /** + * rt2x00pci_txdone - Handle TX done events. + * @entry: The queue entry for which a TX done event was received. + * @txdesc: The TX done descriptor for the entry. + */ +void rt2x00pci_txdone(struct queue_entry *entry, + struct txdone_entry_desc *txdesc); + +/** * rt2x00pci_rxdone - Handle RX done events * @rt2x00dev: Device pointer, see &struct rt2x00_dev. */ diff --git a/drivers/net/wireless/rt2x00/rt2x00queue.c b/drivers/net/wireless/rt2x00/rt2x00queue.c index 9e48bbc..bcdbf95 100644 --- a/drivers/net/wireless/rt2x00/rt2x00queue.c +++ b/drivers/net/wireless/rt2x00/rt2x00queue.c @@ -99,21 +99,8 @@ void rt2x00queue_map_txskb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb) { struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb); - /* - * If device has requested headroom, we should make sure that - * is also mapped to the DMA so it can be used for transfering - * additional descriptor information to the hardware. - */ - skb_push(skb, rt2x00dev->ops->extra_tx_headroom); - skbdesc->skb_dma = dma_map_single(rt2x00dev->dev, skb->data, skb->len, DMA_TO_DEVICE); - - /* - * Restore data pointer to original location again. - */ - skb_pull(skb, rt2x00dev->ops->extra_tx_headroom); - skbdesc->flags |= SKBDESC_DMA_MAPPED_TX; } EXPORT_SYMBOL_GPL(rt2x00queue_map_txskb); @@ -129,16 +116,12 @@ void rt2x00queue_unmap_skb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb) } if (skbdesc->flags & SKBDESC_DMA_MAPPED_TX) { - /* - * Add headroom to the skb length, it has been removed - * by the driver, but it was actually mapped to DMA. - */ - dma_unmap_single(rt2x00dev->dev, skbdesc->skb_dma, - skb->len + rt2x00dev->ops->extra_tx_headroom, + dma_unmap_single(rt2x00dev->dev, skbdesc->skb_dma, skb->len, DMA_TO_DEVICE); skbdesc->flags &= ~SKBDESC_DMA_MAPPED_TX; } } +EXPORT_SYMBOL_GPL(rt2x00queue_unmap_skb); void rt2x00queue_free_skb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb) { @@ -533,9 +516,6 @@ int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb, return -EIO; } - if (test_bit(DRIVER_REQUIRE_DMA, &queue->rt2x00dev->flags)) - rt2x00queue_map_txskb(queue->rt2x00dev, skb); - set_bit(ENTRY_DATA_PENDING, &entry->flags); rt2x00queue_index_inc(queue, Q_INDEX); diff --git a/drivers/net/wireless/rt2x00/rt2x00usb.c b/drivers/net/wireless/rt2x00/rt2x00usb.c index e731389..9388e44 100644 --- a/drivers/net/wireless/rt2x00/rt2x00usb.c +++ b/drivers/net/wireless/rt2x00/rt2x00usb.c @@ -197,6 +197,11 @@ static void rt2x00usb_interrupt_txdone(struct urb *urb) return; /* + * Remove the descriptor from the front of the skb. + */ + skb_pull(entry->skb, entry->queue->desc_size); + + /* * Obtain the status about this packet. * Note that when the status is 0 it does not mean the * frame was send out correctly. It only means the frame @@ -242,12 +247,6 @@ int rt2x00usb_write_tx_data(struct queue_entry *entry, rt2x00usb_interrupt_txdone, entry); /* - * Make sure the skb->data pointer points to the frame, not the - * descriptor. - */ - skb_pull(entry->skb, entry->queue->desc_size); - - /* * Call the driver's add_tx_datadesc function, if it exists. */ if (rt2x00dev->ops->lib->add_tx_datadesc) diff --git a/drivers/net/wireless/rt2x00/rt61pci.c b/drivers/net/wireless/rt2x00/rt61pci.c index cf9d507..5fd6481 100644 --- a/drivers/net/wireless/rt2x00/rt61pci.c +++ b/drivers/net/wireless/rt2x00/rt61pci.c @@ -2109,7 +2109,7 @@ static void rt61pci_txdone(struct rt2x00_dev *rt2x00dev) __set_bit(TXDONE_UNKNOWN, &txdesc.flags); txdesc.retry = 0; - rt2x00lib_txdone(entry_done, &txdesc); + rt2x00pci_txdone(entry_done, &txdesc); entry_done = rt2x00queue_get_entry(queue, Q_INDEX_DONE); } @@ -2129,7 +2129,7 @@ static void rt61pci_txdone(struct rt2x00_dev *rt2x00dev) } txdesc.retry = rt2x00_get_field32(reg, STA_CSR4_RETRY_COUNT); - rt2x00lib_txdone(entry, &txdesc); + rt2x00pci_txdone(entry, &txdesc); } } diff --git a/drivers/net/wireless/rt2x00/rt73usb.c b/drivers/net/wireless/rt2x00/rt73usb.c index 085f76e..10893d5 100644 --- a/drivers/net/wireless/rt2x00/rt73usb.c +++ b/drivers/net/wireless/rt2x00/rt73usb.c @@ -1441,7 +1441,7 @@ static void rt73usb_write_tx_desc(struct rt2x00_dev *rt2x00dev, struct txentry_desc *txdesc) { struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb); - __le32 *txd = (__le32 *)(skb->data - TXD_DESC_SIZE); + __le32 *txd = (__le32 *) skb->data; u32 word; /* @@ -1504,6 +1504,7 @@ static void rt73usb_write_tx_desc(struct rt2x00_dev *rt2x00dev, /* * Register descriptor details in skb frame descriptor. */ + skbdesc->flags |= SKBDESC_DESC_IN_SKB; skbdesc->desc = txd; skbdesc->desc_len = TXD_DESC_SIZE; } @@ -1527,6 +1528,12 @@ static void rt73usb_write_beacon(struct queue_entry *entry, rt2x00usb_register_write(rt2x00dev, TXRX_CSR9, reg); /* + * Add space for the descriptor in front of the skb. + */ + skb_push(entry->skb, TXD_DESC_SIZE); + memset(entry->skb->data, 0, TXD_DESC_SIZE); + + /* * Write the TX descriptor for the beacon. */ rt73usb_write_tx_desc(rt2x00dev, entry->skb, txdesc); @@ -1537,11 +1544,6 @@ static void rt73usb_write_beacon(struct queue_entry *entry, rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_BEACON, entry->skb); /* - * Take the descriptor in front of the skb into account. - */ - skb_push(entry->skb, TXD_DESC_SIZE); - - /* * Write entire beacon with descriptor to register. */ beacon_base = HW_BEACON_OFFSET(entry->entry_idx);