Thread (10 messages) flat view 10 messages, 4 authors, 2016-10-10

Re: [PATCH net-next 5/6] qed: Allow chance for fast ramrod completions

From: Mintz, Yuval <hidden>
Date: 2016-10-10 06:47:13

quoted
+     while (iter_cnt--) {
+             /* Validate we receive completion update */
               smp_rmb();
               if (comp_done->done == 1) {
                       if (p_fw_ret)
                               *p_fw_ret = comp_done->fw_return_code;
                       return 0;
               }
Note that this smp_rmb() and accesses to ->done and ->fw_return_code are
racy.
fw_return_code needs to be written _before_ done.
Thanks for catching this up.

Dave  - do you want me to re-spin for this?
I believe it's a day-1 issue [not introduced by this series],
and merits its own patch [and not incorporated into this one].
Still, if you'd like me to re-spin and include Eric's fix, I'll do it.
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