From: Ivo van Doorn Date: Fri, 4 Jul 2008 12:56:07 +0000 (+0200) Subject: rt2x00: Decrease alignment headroom X-Git-Tag: v2.6.27-rc1~969^2~186^2~13 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;ds=sidebyside;h=ff352391acfac1e183c8c8b2858f9393bd064a65;p=linux-2.6 rt2x00: Decrease alignment headroom We only need 4 bytes of headroom for alignment purposes in the RX frame. It was previously higher for optimization purposes which are no longer possible due to DMA mappings. v2: Fix patch error Signed-off-by: Ivo van Doorn Signed-off-by: John W. Linville --- diff --git a/drivers/net/wireless/rt2x00/rt2x00queue.c b/drivers/net/wireless/rt2x00/rt2x00queue.c index 8e86611791..3ddce538ef 100644 --- a/drivers/net/wireless/rt2x00/rt2x00queue.c +++ b/drivers/net/wireless/rt2x00/rt2x00queue.c @@ -45,10 +45,11 @@ struct sk_buff *rt2x00queue_alloc_rxskb(struct rt2x00_dev *rt2x00dev, frame_size = entry->queue->data_size + entry->queue->desc_size; /* - * Reserve a few bytes extra headroom to allow drivers some moving - * space (e.g. for alignment), while keeping the skb aligned. + * The payload should be aligned to a 4-byte boundary, + * this means we need at least 3 bytes for moving the frame + * into the correct offset. */ - reserved_size = 8; + reserved_size = 4; /* * Allocate skbuffer.