+ /* Allocation may have failed due to pci_alloc_consistent
+ insisting on use of GFP_DMA, which is more restrictive
+ than necessary... */
+ struct dma_desc *rx_ring;
+ dma_addr_t rx_ring_dma;
+
+ rx_ring = kzalloc(BCM43xx_DMA_RINGMEMSIZE, GFP_KERNEL);
+ if (!rx_ring)
+ goto out_err;
+
+ rx_ring_dma = pci_map_single(ring->bcm->pci_dev, rx_ring,
+ BCM43xx_DMA_RINGMEMSIZE,
+ PCI_DMA_BIDIRECTIONAL);
+
+ if (pci_dma_mapping_error(rx_ring_dma) ||
+ rx_ring_dma + BCM43xx_DMA_RINGMEMSIZE > ring->bcm->dma_mask) {
+ /* Sigh... */
+ if (!pci_dma_mapping_error(rx_ring_dma))
+ pci_unmap_single(ring->bcm->pci_dev,
+ rx_ring_dma, BCM43xx_DMA_RINGMEMSIZE,
+ PCI_DMA_BIDIRECTIONAL);
+ rx_ring_dma = pci_map_single(ring->bcm->pci_dev,
+ rx_ring, BCM43xx_DMA_RINGMEMSIZE,
+ PCI_DMA_BIDIRECTIONAL);
+ if (pci_dma_mapping_error(rx_ring_dma) ||
+ rx_ring_dma + BCM43xx_DMA_RINGMEMSIZE > ring->bcm->dma_mask) {
+ assert(0);
+ if (!pci_dma_mapping_error(rx_ring_dma))
+ pci_unmap_single(ring->bcm->pci_dev,
+ rx_ring_dma, BCM43xx_DMA_RINGMEMSIZE,
+ PCI_DMA_BIDIRECTIONAL);
+ goto out_err;
+ }
+ }
+
+ ring->descbase = rx_ring;
+ ring->dmabase = rx_ring_dma;