Re: [PATCH] register_to_trap(): Increase number of iterations from 3 to 5

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On 12/8/2017 12:38 PM, Hal Rosenstock wrote:
> On 12/8/2017 12:22 PM, Bart Van Assche wrote:
>> Master SM changes can take more than three seconds. Hence increase
>> the time during which to wait for a master SM to appear from 3 to 5
>> seconds.
>>
>> Signed-off-by: Bart Van Assche <bart.vanassche@xxxxxxx>
>> Cc: Hal Rosenstock <hal@xxxxxxxxxxxxxxxxxx>
>> Cc: Nicolas Morey-Chaisemartin <NMoreyChaisemartin@xxxxxxx>
>> ---
>>  srp_daemon/srp_handle_traps.c | 11 +++++------
>>  1 file changed, 5 insertions(+), 6 deletions(-)
>>
>> diff --git a/srp_daemon/srp_handle_traps.c b/srp_daemon/srp_handle_traps.c
>> index 6d94634ef6df..dda746a5c69d 100644
>> --- a/srp_daemon/srp_handle_traps.c
>> +++ b/srp_daemon/srp_handle_traps.c
>> @@ -550,8 +550,8 @@ static int register_to_trap(struct sync_resources *sync_res,
>>  	struct ibv_sge sg;
>>  	struct ibv_send_wr *_bad_wr = NULL;
>>  	struct ibv_send_wr **bad_wr = &_bad_wr;
>> -	int counter = 0;
>> -	int rc = 0;
>> +	int counter;
>> +	int rc;
>>  	int ret;
>>  	long long unsigned comp_mask = 0;
>>  
>> @@ -609,7 +609,7 @@ static int register_to_trap(struct sync_resources *sync_res,
>>  	p_sa_mad->comp_mask = htobe64(comp_mask);
>>  	pr_debug("comp_mask: %llx\n", comp_mask);
>>  
>> -	do {
>> +	for (counter = 5, rc = 0; counter > 0 && rc == 0; counter--) {
>>  		pthread_mutex_lock(res->mad_buffer_mutex);
>>  		res->mad_buffer->mad_hdr.base_version = 0; // flag that the buffer is empty
>>  		pthread_mutex_unlock(res->mad_buffer_mutex);
>> @@ -640,10 +640,9 @@ static int register_to_trap(struct sync_resources *sync_res,
>>  			}
>>  			pthread_mutex_unlock(res->mad_buffer_mutex);
>>  		} while (rc == 2); // while old response.
>> +	}
>>  
>> -	} while (rc == 0 && ++counter < 3);
>> -
>> -	if (counter==3) {
>> +	if (counter == 0) {
>>  		pr_err("No response to inform info registration\n");
>>  		return -EAGAIN;
>>  	} 
>>
> 
> Reviewed-by: Hal Rosenstock <hal@xxxxxxxxxxxx>
> 

Given what Nicolas wrote, maybe this should be split into 2 patches with
first being refactoring but not changing counter and leave the counter
increase for Nicolas.

-- Hal
--
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