wake_up(&blkif->wq);
}
-irqreturn_t blkif_be_int(int irq, void *dev_id, struct pt_regs *regs)
+irqreturn_t blkif_be_int(int irq, void *dev_id)
{
blkif_notify_work(dev_id);
return IRQ_HANDLED;
static int do_block_io_op(blkif_t *blkif)
{
blkif_back_ring_t *blk_ring = &blkif->blk_ring;
- blkif_request_t *req;
+ blkif_request_t req;
pending_req_t *pending_req;
RING_IDX rc, rp;
int more_to_do = 0;
break;
}
- req = RING_GET_REQUEST(blk_ring, rc);
+ memcpy(&req, RING_GET_REQUEST(blk_ring, rc), sizeof(req));
blk_ring->req_cons = ++rc; /* before make_response() */
- switch (req->operation) {
+ switch (req.operation) {
case BLKIF_OP_READ:
blkif->st_rd_req++;
- dispatch_rw_block_io(blkif, req, pending_req);
+ dispatch_rw_block_io(blkif, &req, pending_req);
break;
case BLKIF_OP_WRITE:
blkif->st_wr_req++;
- dispatch_rw_block_io(blkif, req, pending_req);
+ dispatch_rw_block_io(blkif, &req, pending_req);
break;
default:
DPRINTK("error: unknown block io operation [%d]\n",
- req->operation);
- make_response(blkif, req->id, req->operation,
+ req.operation);
+ make_response(blkif, req.id, req.operation,
BLKIF_RSP_ERROR);
free_req(pending_req);
break;
req->seg[i].first_sect + 1;
if ((req->seg[i].last_sect >= (PAGE_SIZE >> 9)) ||
- (seg[i].nsec <= 0))
+ (req->seg[i].last_sect < req->seg[i].first_sect))
goto fail_response;
preq.nr_sects += seg[i].nsec;
for (i = 0; i < nseg; i++) {
if (unlikely(map[i].status != 0)) {
DPRINTK("invalid buffer -- could not remap it\n");
- goto fail_flush;
+ map[i].handle = BLKBACK_INVALID_HANDLE;
+ ret |= 1;
}
pending_handle(pending_req, i) = map[i].handle;
+
+ if (ret)
+ continue;
+
set_phys_to_machine(__pa(vaddr(
pending_req, i)) >> PAGE_SHIFT,
FOREIGN_FRAME(map[i].dev_bus_addr >> PAGE_SHIFT));
(req->seg[i].first_sect << 9);
}
+ if (ret)
+ goto fail_flush;
+
if (vbd_translate(&preq, blkif, operation) != 0) {
DPRINTK("access denied: %s of [%llu,%llu] on dev=%04x\n",
operation == READ ? "read" : "write",