On 3.03.2023 12:35, Bryan O'Donoghue wrote:
> On 03/03/2023 11:33, Konrad Dybcio wrote:
>>
>>
>> On 3.03.2023 12:32, Bryan O'Donoghue wrote:
>>> On 03/03/2023 02:35, Konrad Dybcio wrote:
>>>> Currently, when sync_state calls set(n, n) all the paths for setting
>>>> parameters on an icc node are called twice. Avoid that.
>>>>
>>>> Fixes: 751f4d14cdb4 ("interconnect: icc-rpm: Set destination bandwidth as well as source bandwidth")
>>>> Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
>>>> ---
>>>> RFC comes from the fact that I *believe* this should be correct, but I'm
>>>> not entirely sure about it..
>>>>
>>>>
>>>> drivers/interconnect/qcom/icc-rpm.c | 2 +-
>>>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>>>
>>>> diff --git a/drivers/interconnect/qcom/icc-rpm.c b/drivers/interconnect/qcom/icc-rpm.c
>>>> index a6e0de03f46b..d35db1af9b08 100644
>>>> --- a/drivers/interconnect/qcom/icc-rpm.c
>>>> +++ b/drivers/interconnect/qcom/icc-rpm.c
>>>> @@ -387,7 +387,7 @@ static int qcom_icc_set(struct icc_node *src, struct icc_node *dst)
>>>> ret = __qcom_icc_set(src, src_qn, sum_bw);
>>>> if (ret)
>>>> return ret;
>>>> - if (dst_qn) {
>>>> + if (dst_qn && src_qn != dst_qn) {
>>>> ret = __qcom_icc_set(dst, dst_qn, sum_bw);
>>>> if (ret)
>>>> return ret;
>>>
>>> Is it possible for src_qn == dst_qn ?
>> As the commit message says, sync_state calls set(n, n) in
>> drivers/interconnect/core.c : icc_sync_state(struct device *dev)
>
> So you've _seen_ that happen ?
Yes, I did, on every boot previous to this patch, I believe.
Konrad
>
