diff options
| author | Dean Luick <dean.luick@intel.com> | 2015-12-01 15:38:17 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-12-21 13:51:55 -0800 |
| commit | d22f9d6bf5622bc3ffb709fb229715167a8bd533 (patch) | |
| tree | 5df2070952f21d03adb6efd70b01f1f4aef08b00 /drivers/staging | |
| parent | 05087f3b224ad42086c019ff11679298faeb50f2 (diff) | |
staging/rdma/hfi1: Add a credit push on diagpkt allocate fail
When sending a diagnostic packet, if the send context does not
have enough room, force a credit return and try again.
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Jubin John <jubin.john@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging')
| -rw-r--r-- | drivers/staging/rdma/hfi1/diag.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/staging/rdma/hfi1/diag.c b/drivers/staging/rdma/hfi1/diag.c index 0aaad7412842..e4cd333bba83 100644 --- a/drivers/staging/rdma/hfi1/diag.c +++ b/drivers/staging/rdma/hfi1/diag.c @@ -379,6 +379,7 @@ static ssize_t diagpkt_send(struct diag_pkt *dp) pio_release_cb credit_cb = NULL; void *credit_arg = NULL; struct diagpkt_wait *wait = NULL; + int trycount = 0; dd = hfi1_lookup(dp->unit); if (!dd || !(dd->flags & HFI1_PRESENT) || !dd->kregbase) { @@ -493,8 +494,15 @@ static ssize_t diagpkt_send(struct diag_pkt *dp) credit_arg = wait; } +retry: pbuf = sc_buffer_alloc(sc, total_len, credit_cb, credit_arg); if (!pbuf) { + if (trycount == 0) { + /* force a credit return and try again */ + sc_return_credits(sc); + trycount = 1; + goto retry; + } /* * No send buffer means no credit callback. Undo * the wait set-up that was done above. We free wait |