linux-kernel - Re: [ofa-general] Re: [PATCH] iwch_create_cq off by one error

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Date:	Tue, 04 Mar 2008 10:29:37 -0600
From:	Steve Wise <swise@...ngridcomputing.com>
To:	Roland Dreier <rdreier@...co.com>
CC:	linux-kernel@...r.kernel.org, general@...ts.openfabrics.org
Subject: Re: [ofa-general] Re: [PATCH] iwch_create_cq off by one error

Hey Roland,

Are you going to pull this one in?

Thanks,

Steve.

Steve Wise wrote:
> Acked-by: Steve Wise <swise@...ngridcomputing.com>
> 
> 
> Jon Mason wrote:
>> The cxbg3 driver is unnecessarily decreasing the number of cq entries
>> by one when creating a cq.  This will cause an error of not having as
>> many cqs as requested by the user, if the user requests a power of 2
>> cq length.
>>
>> Thanks,
>> Jon
>>
>> Signed-off-by: Jon Mason <jon@...ngridcomputing.com>
>> ---
>>  drivers/infiniband/hw/cxgb3/iwch_provider.c |    2 +-
>>  1 files changed, 1 insertions(+), 1 deletions(-)
>>
>> diff --git a/drivers/infiniband/hw/cxgb3/iwch_provider.c 
>> b/drivers/infiniband/hw/cxgb3/iwch_provider.c
>> index f0c7775..800ef6d 100644
>> --- a/drivers/infiniband/hw/cxgb3/iwch_provider.c
>> +++ b/drivers/infiniband/hw/cxgb3/iwch_provider.c
>> @@ -188,7 +188,7 @@ static struct ib_cq *iwch_create_cq(struct 
>> ib_device *ibdev, int entries, int ve
>>          return ERR_PTR(-ENOMEM);
>>      }
>>      chp->rhp = rhp;
>> -    chp->ibcq.cqe = (1 << chp->cq.size_log2) - 1;
>> +    chp->ibcq.cqe = 1 << chp->cq.size_log2;
>>      spin_lock_init(&chp->lock);
>>      atomic_set(&chp->refcnt, 1);
>>      init_waitqueue_head(&chp->wait);
> 
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