Re: [PATCH RESEND] soundwire: stream: Revert "soundwire: stream: fix programming slave ports for non-continous port maps"
From: Péter Ujfalusi
Date: Tue Sep 10 2024 - 09:49:59 EST
On 10/09/2024 16:05, Péter Ujfalusi wrote:
>
>
> On 09/09/2024 19:47, Krzysztof Kozlowski wrote:
>> This reverts commit ab8d66d132bc8f1992d3eb6cab8d32dda6733c84 because it
>> breaks codecs using non-continuous masks in source and sink ports. The
>> commit missed the point that port numbers are not used as indices for
>> iterating over prop.sink_ports or prop.source_ports.
>>
>> Soundwire core and existing codecs expect that the array passed as
>> prop.sink_ports and prop.source_ports is continuous. The port mask still
>> might be non-continuous, but that's unrelated.
>>
>> Reported-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
>> Closes: https://lore.kernel.org/all/b6c75eee-761d-44c8-8413-2a5b34ee2f98@xxxxxxxxxxxxxxx/
>> Fixes: ab8d66d132bc ("soundwire: stream: fix programming slave ports for non-continous port maps")
>> Acked-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
>> Reviewed-by: Charles Keepax <ckeepax@xxxxxxxxxxxxxxxxxxxxx>
>> Cc: <stable@xxxxxxxxxxxxxxx>
>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
>
> Tested-by: Peter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>
Vinod: can you pick this patch for 6.11 if there is still time since
upstream is also broken since 6.11-rc6
>
>>
>> ---
>>
>> Resending with Ack/Rb tags and missing Cc-stable.
>> ---
>> drivers/soundwire/stream.c | 8 ++++----
>> 1 file changed, 4 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c
>> index f275143d7b18..7aa4900dcf31 100644
>> --- a/drivers/soundwire/stream.c
>> +++ b/drivers/soundwire/stream.c
>> @@ -1291,18 +1291,18 @@ struct sdw_dpn_prop *sdw_get_slave_dpn_prop(struct sdw_slave *slave,
>> unsigned int port_num)
>> {
>> struct sdw_dpn_prop *dpn_prop;
>> - unsigned long mask;
>> + u8 num_ports;
>> int i;
>>
>> if (direction == SDW_DATA_DIR_TX) {
>> - mask = slave->prop.source_ports;
>> + num_ports = hweight32(slave->prop.source_ports);
>> dpn_prop = slave->prop.src_dpn_prop;
>> } else {
>> - mask = slave->prop.sink_ports;
>> + num_ports = hweight32(slave->prop.sink_ports);
>> dpn_prop = slave->prop.sink_dpn_prop;
>> }
>>
>> - for_each_set_bit(i, &mask, 32) {
>> + for (i = 0; i < num_ports; i++) {
>> if (dpn_prop[i].num == port_num)
>> return &dpn_prop[i];
>> }
>
--
Péter