From: Ralph Campbell Date: Thu, 17 Jun 2010 23:14:15 +0000 (+0000) Subject: IB/qib: Completion queue callback needs to be single threaded X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=950aff53949268eec4b0f2bd49f700f9585698f7;p=deliverable%2Flinux.git IB/qib: Completion queue callback needs to be single threaded Workqueues aren't exactly equivalent to tasklets since the callback function may be called from multiple CPUs before the callback returns. This causes completion notification callbacks to have MT bugs since they weren't expecting this behavior. The fix is to use a single threaded work queue. Signed-off-by: Ralph Campbell Signed-off-by: Roland Dreier --- diff --git a/drivers/infiniband/hw/qib/qib_init.c b/drivers/infiniband/hw/qib/qib_init.c index 1d4db4b19d76..7831ff835d15 100644 --- a/drivers/infiniband/hw/qib/qib_init.c +++ b/drivers/infiniband/hw/qib/qib_init.c @@ -1059,7 +1059,7 @@ static int __init qlogic_ib_init(void) goto bail_dev; } - qib_cq_wq = create_workqueue("qib_cq"); + qib_cq_wq = create_singlethread_workqueue("qib_cq"); if (!qib_cq_wq) { ret = -ENOMEM; goto bail_wq;