RDMA/addr: Fix some cancellation problems in process_req()

Fix following problems in process_req() relating to cancellation:

- Function is wrongly doing another addr_remote() when cancelled,
  which is not required.
- Make failure reporting immediate by using time_after_eq().
- On cancellation, -ETIMEDOUT was returned to the callback routine
  instead of the more appropriate -ECANCELLED (users getting notified
  may want to print/return this status, eg ucma_event_handler).

Signed-off-by: Krishna Kumar <krkumar2@in.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 5 insertions, 6 deletions

diff --git a/drivers/infiniband/core/addr.c b/drivers/infiniband/core/addr.c
index a68d7c7df4ca..15ba51806ffd 100644
--- a/drivers/infiniband/core/addr.c
+++ b/drivers/infiniband/core/addr.c
@@ -225,17 +225,16 @@ static void process_req(void *data)
 
         mutex_lock(&lock);
         list_for_each_entry_safe(req, temp_req, &req_list, list) {
-                if (req->status) {
+                if (req->status == -ENODATA) {
                         src_in = (struct sockaddr_in *) &req->src_addr;
                         dst_in = (struct sockaddr_in *) &req->dst_addr;
                         req->status = addr_resolve_remote(src_in, dst_in,
                                                           req->addr);
+                        if (req->status && time_after_eq(jiffies, req->timeout))
+                                req->status = -ETIMEDOUT;
+                        else if (req->status == -ENODATA)
+                                continue;
                 }
-                if (req->status && time_after(jiffies, req->timeout))
-                        req->status = -ETIMEDOUT;
-                else if (req->status == -ENODATA)
-                        continue;
-
                 list_del(&req->list);
                 list_add_tail(&req->list, &done_list);
         }