On 06/06/2011 09:11 AM, Mike McCormack wrote:
Make sure not to modify the skb we resubmit. Signed-off-by: Mike McCormack<mikem@xxxxxxxxxx>
I think this is a bug introduced by commit a9e1286975843042480. If it is, please resubmit as a single patch with subject "rtlwifi: Fix case where modified skb could be resubmitted", or something like this. Any bug fixes will go into 3.0, while the enhancements will go to 3.1.
Larry
--- drivers/net/wireless/rtlwifi/pci.c | 28 +++++++++++++--------------- 1 files changed, 13 insertions(+), 15 deletions(-) diff --git a/drivers/net/wireless/rtlwifi/pci.c b/drivers/net/wireless/rtlwifi/pci.c index fc44005..e502db0 100644 --- a/drivers/net/wireless/rtlwifi/pci.c +++ b/drivers/net/wireless/rtlwifi/pci.c @@ -670,6 +670,19 @@ static void _rtl_pci_rx_interrupt(struct ieee80211_hw *hw) &rx_status, (u8 *) pdesc, skb); + new_skb = dev_alloc_skb(rtlpci->rxbuffersize); + if (unlikely(!new_skb)) { + RT_TRACE(rtlpriv, (COMP_INTR | COMP_RECV), + DBG_DMESG, + ("can't alloc skb for rx\n")); + goto done; + } + + pci_unmap_single(rtlpci->pdev, + *((dma_addr_t *) skb->cb), + rtlpci->rxbuffersize, + PCI_DMA_FROMDEVICE); + skb_put(skb, rtlpriv->cfg->ops->get_desc((u8 *) pdesc, false, HW_DESC_RXPKT_LEN)); @@ -686,21 +699,6 @@ static void _rtl_pci_rx_interrupt(struct ieee80211_hw *hw) hdr = rtl_get_hdr(skb); fc = rtl_get_fc(skb); - /* try for new buffer - if allocation fails, drop - * frame and reuse old buffer - */ - new_skb = dev_alloc_skb(rtlpci->rxbuffersize); - if (unlikely(!new_skb)) { - RT_TRACE(rtlpriv, (COMP_INTR | COMP_RECV), - DBG_DMESG, - ("can't alloc skb for rx\n")); - goto done; - } - pci_unmap_single(rtlpci->pdev, - *((dma_addr_t *) skb->cb), - rtlpci->rxbuffersize, - PCI_DMA_FROMDEVICE); - if (!stats.crc&& !stats.hwerror) { memcpy(IEEE80211_SKB_RXCB(skb),&rx_status, sizeof(rx_status));
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