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IB/hfi1: Don't call cond_resched in atomic mode when sending packets

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This patch fixed the problem where the driver might reschedule in atomic
mode when sending packets. This is due to the fact that the call to
cond_resched() in hfi1_do_send() might occur in atomic mode and a check is
required to avoid the warning message:
    "kernel: BUG: scheduling while atomic: swapper/2/0/0x10000100."

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Jubin John <jubin.john@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Kaike Wan 2016-03-05 08:50:49 -08:00 committed by Doug Ledford
parent 528ee9fbf0
commit 831464ce4b
1 changed files with 5 additions and 2 deletions
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7
drivers/staging/rdma/hfi1/ruc.c
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@ -906,8 +906,11 @@ void hfi1_do_send(struct rvt_qp *qp)
*ps.ppd->dd->send_schedule);
return;
}
cond_resched();
this_cpu_inc(*ps.ppd->dd->send_schedule);
if (!irqs_disabled()) {
cond_resched();
this_cpu_inc(
*ps.ppd->dd->send_schedule);
}
timeout = jiffies + (timeout_int) / 8;
}
spin_lock_irqsave(&qp->s_lock, flags);