From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gra-lx1.iram.es (gra-lx1.iram.es [150.214.224.41]) by ozlabs.org (Postfix) with ESMTP id 10F25DE115 for ; Sat, 16 May 2009 04:39:42 +1000 (EST) Date: Fri, 15 May 2009 20:39:24 +0200 From: Gabriel Paubert To: Lennert Buytenhek Subject: [PATCH] mv643xx_eth: fix PPC DMA breakage Message-ID: <20090515183924.GA29279@iram.es> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: tbm@cyrius.com, LinuxPPC , pacman@kosh.dhis.org, netdev@vger.kernel.org, David Miller List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , After 2.6.29, PPC no more admits passing NULL to the dev parameter of the DMA API. The result is a BUG followed by solid lock-up when the mv643xx_eth driver brings an interface up. The following patch makes the driver work on my Pegasos again; it is mostly a search and replace of NULL by mp->dev->dev.parent in dma allocation/freeing/mapping/unmapping functions. Signed-off-by: Gabriel Paubert diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c index a400d71..6bb5af3 100644 --- a/drivers/net/mv643xx_eth.c +++ b/drivers/net/mv643xx_eth.c @@ -569,7 +569,7 @@ static int rxq_process(struct rx_queue *rxq, int budget) if (rxq->rx_curr_desc == rxq->rx_ring_size) rxq->rx_curr_desc = 0; - dma_unmap_single(NULL, rx_desc->buf_ptr, + dma_unmap_single(mp->dev->dev.parent, rx_desc->buf_ptr, rx_desc->buf_size, DMA_FROM_DEVICE); rxq->rx_desc_count--; rx++; @@ -678,8 +678,9 @@ static int rxq_refill(struct rx_queue *rxq, int budget) rx_desc = rxq->rx_desc_area + rx; - rx_desc->buf_ptr = dma_map_single(NULL, skb->data, - mp->skb_size, DMA_FROM_DEVICE); + rx_desc->buf_ptr = dma_map_single(mp->dev->dev.parent, + skb->data, mp->skb_size, + DMA_FROM_DEVICE); rx_desc->buf_size = mp->skb_size; rxq->rx_skb[rx] = skb; wmb(); @@ -718,6 +719,7 @@ static inline unsigned int has_tiny_unaligned_frags(struct sk_buff *skb) static void txq_submit_frag_skb(struct tx_queue *txq, struct sk_buff *skb) { + struct mv643xx_eth_private *mp = txq_to_mp(txq); int nr_frags = skb_shinfo(skb)->nr_frags; int frag; @@ -746,10 +748,10 @@ static void txq_submit_frag_skb(struct tx_queue *txq, struct sk_buff *skb) desc->l4i_chk = 0; desc->byte_cnt = this_frag->size; - desc->buf_ptr = dma_map_page(NULL, this_frag->page, - this_frag->page_offset, - this_frag->size, - DMA_TO_DEVICE); + desc->buf_ptr = dma_map_page(mp->dev->dev.parent, + this_frag->page, + this_frag->page_offset, + this_frag->size, DMA_TO_DEVICE); } } @@ -826,7 +828,8 @@ no_csum: desc->l4i_chk = l4i_chk; desc->byte_cnt = length; - desc->buf_ptr = dma_map_single(NULL, skb->data, length, DMA_TO_DEVICE); + desc->buf_ptr = dma_map_single(mp->dev->dev.parent, skb->data, + length, DMA_TO_DEVICE); __skb_queue_tail(&txq->tx_skb, skb); @@ -956,10 +959,10 @@ static int txq_reclaim(struct tx_queue *txq, int budget, int force) } if (cmd_sts & TX_FIRST_DESC) { - dma_unmap_single(NULL, desc->buf_ptr, + dma_unmap_single(mp->dev->dev.parent, desc->buf_ptr, desc->byte_cnt, DMA_TO_DEVICE); } else { - dma_unmap_page(NULL, desc->buf_ptr, + dma_unmap_page(mp->dev->dev.parent, desc->buf_ptr, desc->byte_cnt, DMA_TO_DEVICE); } @@ -1894,9 +1897,9 @@ static int rxq_init(struct mv643xx_eth_private *mp, int index) mp->rx_desc_sram_size); rxq->rx_desc_dma = mp->rx_desc_sram_addr; } else { - rxq->rx_desc_area = dma_alloc_coherent(NULL, size, - &rxq->rx_desc_dma, - GFP_KERNEL); + rxq->rx_desc_area = dma_alloc_coherent(mp->dev->dev.parent, + size, &rxq->rx_desc_dma, + GFP_KERNEL); } if (rxq->rx_desc_area == NULL) { @@ -1947,7 +1950,7 @@ out_free: if (index == 0 && size <= mp->rx_desc_sram_size) iounmap(rxq->rx_desc_area); else - dma_free_coherent(NULL, size, + dma_free_coherent(mp->dev->dev.parent, size, rxq->rx_desc_area, rxq->rx_desc_dma); @@ -1979,7 +1982,7 @@ static void rxq_deinit(struct rx_queue *rxq) rxq->rx_desc_area_size <= mp->rx_desc_sram_size) iounmap(rxq->rx_desc_area); else - dma_free_coherent(NULL, rxq->rx_desc_area_size, + dma_free_coherent(mp->dev->dev.parent, rxq->rx_desc_area_size, rxq->rx_desc_area, rxq->rx_desc_dma); kfree(rxq->rx_skb); @@ -2007,9 +2010,9 @@ static int txq_init(struct mv643xx_eth_private *mp, int index) mp->tx_desc_sram_size); txq->tx_desc_dma = mp->tx_desc_sram_addr; } else { - txq->tx_desc_area = dma_alloc_coherent(NULL, size, - &txq->tx_desc_dma, - GFP_KERNEL); + txq->tx_desc_area = dma_alloc_coherent(mp->dev->dev.parent, + size, &txq->tx_desc_dma, + GFP_KERNEL); } if (txq->tx_desc_area == NULL) { @@ -2053,7 +2056,7 @@ static void txq_deinit(struct tx_queue *txq) txq->tx_desc_area_size <= mp->tx_desc_sram_size) iounmap(txq->tx_desc_area); else - dma_free_coherent(NULL, txq->tx_desc_area_size, + dma_free_coherent(mp->dev->dev.parent, txq->tx_desc_area_size, txq->tx_desc_area, txq->tx_desc_dma); }