2.6.24-stable review patch. If anyone has any objections, please let us know. ------------------ From: Michael Buesch patch 8dd0100ce9511e52614ecd0a6587c13ce5769c8b in mainline. This fixes four resource leakages. In any error path we must deallocate the DMA frame slots we previously allocated by request_slot(). This is done by storing the ring pointers before doing any ring allocation and restoring the old pointers in case of an error. Signed-off-by: Michael Buesch Signed-off-by: Stefano Brivio Signed-off-by: John W. Linville Signed-off-by: Greg Kroah-Hartman --- drivers/net/wireless/b43/dma.c | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) --- a/drivers/net/wireless/b43/dma.c +++ b/drivers/net/wireless/b43/dma.c @@ -1106,7 +1106,7 @@ static int dma_tx_fragment(struct b43_dm { const struct b43_dma_ops *ops = ring->ops; u8 *header; - int slot; + int slot, old_top_slot, old_used_slots; int err; struct b43_dmadesc_generic *desc; struct b43_dmadesc_meta *meta; @@ -1116,6 +1116,9 @@ static int dma_tx_fragment(struct b43_dm #define SLOTS_PER_PACKET 2 B43_WARN_ON(skb_shinfo(skb)->nr_frags); + old_top_slot = ring->current_slot; + old_used_slots = ring->used_slots; + /* Get a slot for the header. */ slot = request_slot(ring); desc = ops->idx2desc(ring, slot, &meta_hdr); @@ -1125,13 +1128,19 @@ static int dma_tx_fragment(struct b43_dm err = b43_generate_txhdr(ring->dev, header, skb->data, skb->len, ctl, generate_cookie(ring, slot)); - if (unlikely(err)) + if (unlikely(err)) { + ring->current_slot = old_top_slot; + ring->used_slots = old_used_slots; return err; + } meta_hdr->dmaaddr = map_descbuffer(ring, (unsigned char *)header, sizeof(struct b43_txhdr_fw4), 1); - if (dma_mapping_error(meta_hdr->dmaaddr)) + if (dma_mapping_error(meta_hdr->dmaaddr)) { + ring->current_slot = old_top_slot; + ring->used_slots = old_used_slots; return -EIO; + } ops->fill_descriptor(ring, desc, meta_hdr->dmaaddr, sizeof(struct b43_txhdr_fw4), 1, 0, 0); @@ -1149,6 +1158,8 @@ static int dma_tx_fragment(struct b43_dm if (dma_mapping_error(meta->dmaaddr)) { bounce_skb = __dev_alloc_skb(skb->len, GFP_ATOMIC | GFP_DMA); if (!bounce_skb) { + ring->current_slot = old_top_slot; + ring->used_slots = old_used_slots; err = -ENOMEM; goto out_unmap_hdr; } @@ -1159,6 +1170,8 @@ static int dma_tx_fragment(struct b43_dm meta->skb = skb; meta->dmaaddr = map_descbuffer(ring, skb->data, skb->len, 1); if (dma_mapping_error(meta->dmaaddr)) { + ring->current_slot = old_top_slot; + ring->used_slots = old_used_slots; err = -EIO; goto out_free_bounce; } -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/