6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
commit ab8d66d132bc8f1992d3eb6cab8d32dda6733c84 upstream.
Two bitmasks in 'struct sdw_slave_prop' - 'source_ports' and
'sink_ports' - define which ports to program in
sdw_program_slave_port_params(). The masks are used to get the
appropriate data port properties ('struct sdw_get_slave_dpn_prop') from
an array.
Bitmasks can be non-continuous or can start from index different than 0,
thus when looking for matching port property for given port, we must
iterate over mask bits, not from 0 up to number of ports.
This fixes allocation and programming slave ports, when a source or sink
masks start from further index.
Fixes: f8101c74aa54 ("soundwire: Add Master and Slave port programming")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240729140157.326450-1-krzysztof.kozlowski@xxxxxxxxxx
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/soundwire/stream.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/drivers/soundwire/stream.c
+++ b/drivers/soundwire/stream.c
@@ -1286,18 +1286,18 @@ struct sdw_dpn_prop *sdw_get_slave_dpn_p
unsigned int port_num)
{
struct sdw_dpn_prop *dpn_prop;
- u8 num_ports;
+ unsigned long mask;
int i;
if (direction == SDW_DATA_DIR_TX) {
- num_ports = hweight32(slave->prop.source_ports);
+ mask = slave->prop.source_ports;
dpn_prop = slave->prop.src_dpn_prop;
} else {
- num_ports = hweight32(slave->prop.sink_ports);
+ mask = slave->prop.sink_ports;
dpn_prop = slave->prop.sink_dpn_prop;
}
- for (i = 0; i < num_ports; i++) {
+ for_each_set_bit(i, &mask, 32) {
if (dpn_prop[i].num == port_num)
return &dpn_prop[i];
}
