WARN_ON_ONCE(!parent);
device->dma_device = parent;
}
- /* Setup default max segment size for all IB devices */
- dma_set_max_seg_size(device->dma_device, SZ_2G);
+ if (!device->dev.dma_parms) {
+ if (parent) {
+ /*
+ * The caller did not provide DMA parameters, so
+ * 'parent' probably represents a PCI device. The PCI
+ * core sets the maximum segment size to 64
+ * KB. Increase this parameter to 2 GB.
+ */
+ device->dev.dma_parms = parent->dma_parms;
+ dma_set_max_seg_size(device->dma_device, SZ_2G);
+ } else {
+ WARN_ON_ONCE(true);
+ }
+ }
}
/*