+static void copy_iso_headers(struct iso_context *ctx, void *p)
+{
+ int i = ctx->header_length;
+
+ if (i + ctx->base.header_size > PAGE_SIZE)
+ return;
+
+ /*
+ * The iso header is byteswapped to little endian by
+ * the controller, but the remaining header quadlets
+ * are big endian. We want to present all the headers
+ * as big endian, so we have to swap the first quadlet.
+ */
+ if (ctx->base.header_size > 0)
+ *(u32 *) (ctx->header + i) = __swab32(*(u32 *) (p + 4));
+ if (ctx->base.header_size > 4)
+ *(u32 *) (ctx->header + i + 4) = __swab32(*(u32 *) p);
+ if (ctx->base.header_size > 8)
+ memcpy(ctx->header + i + 8, p + 8, ctx->base.header_size - 8);
+ ctx->header_length += ctx->base.header_size;
+}
+