ASoC: cs35l56: Prevent unbalanced pm_runtime in dsp_work() on SoundWire

Flush the SoundWire interrupt handler work instead of cancelling it.

When a SoundWire interrupt is triggered the pm_runtime is held
until the work has completed. It's therefore unsafe to cancel
the work, it must be flushed.

Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com
Link: https://lore.kernel.org/r/20230512144237.739000-1-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org

diff --git a/sound/soc/codecs/cs35l56.c b/sound/soc/codecs/cs35l56.c
index 46762f7f1449f2d452effaa8267db03b93ed1de5..d1677d76d018881ac28bf034baaac1f762557bdb 100644 (file)
--- a/sound/soc/codecs/cs35l56.c
+++ b/sound/soc/codecs/cs35l56.c
@@ -852,10 +852,11 @@ static void cs35l56_dsp_work(struct work_struct *work)
         */
        if (cs35l56->sdw_peripheral) {
                cs35l56->sdw_irq_no_unmask = true;
-               cancel_work_sync(&cs35l56->sdw_irq_work);
+               flush_work(&cs35l56->sdw_irq_work);
                sdw_write_no_pm(cs35l56->sdw_peripheral, CS35L56_SDW_GEN_INT_MASK_1, 0);
                sdw_read_no_pm(cs35l56->sdw_peripheral, CS35L56_SDW_GEN_INT_STAT_1);
                sdw_write_no_pm(cs35l56->sdw_peripheral, CS35L56_SDW_GEN_INT_STAT_1, 0xFF);
+               flush_work(&cs35l56->sdw_irq_work);
        }
 
        ret = cs35l56_mbox_send(cs35l56, CS35L56_MBOX_CMD_SHUTDOWN);