From: Charles Keepax ckeepax@opensource.cirrus.com
[ Upstream commit a2225a6d155fcb247fe4c6d87f7c91807462966d ]
Best to lock across handling the bus error to ensure the DSP doesn't change power state as we are reading the status registers.
Signed-off-by: Charles Keepax ckeepax@opensource.cirrus.com Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- sound/soc/codecs/wm_adsp.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c index 1dd291cebe67..b69ef01f4067 100644 --- a/sound/soc/codecs/wm_adsp.c +++ b/sound/soc/codecs/wm_adsp.c @@ -3821,11 +3821,13 @@ irqreturn_t wm_adsp2_bus_error(struct wm_adsp *dsp) struct regmap *regmap = dsp->regmap; int ret = 0;
+ mutex_lock(&dsp->pwr_lock); + ret = regmap_read(regmap, dsp->base + ADSP2_LOCK_REGION_CTRL, &val); if (ret) { adsp_err(dsp, "Failed to read Region Lock Ctrl register: %d\n", ret); - return IRQ_HANDLED; + goto error; }
if (val & ADSP2_WDT_TIMEOUT_STS_MASK) { @@ -3844,7 +3846,7 @@ irqreturn_t wm_adsp2_bus_error(struct wm_adsp *dsp) adsp_err(dsp, "Failed to read Bus Err Addr register: %d\n", ret); - return IRQ_HANDLED; + goto error; }
adsp_err(dsp, "bus error address = 0x%x\n", @@ -3857,7 +3859,7 @@ irqreturn_t wm_adsp2_bus_error(struct wm_adsp *dsp) adsp_err(dsp, "Failed to read Pmem Xmem Err Addr register: %d\n", ret); - return IRQ_HANDLED; + goto error; }
adsp_err(dsp, "xmem error address = 0x%x\n", @@ -3870,6 +3872,9 @@ irqreturn_t wm_adsp2_bus_error(struct wm_adsp *dsp) regmap_update_bits(regmap, dsp->base + ADSP2_LOCK_REGION_CTRL, ADSP2_CTRL_ERR_EINT, ADSP2_CTRL_ERR_EINT);
+error: + mutex_unlock(&dsp->pwr_lock); + return IRQ_HANDLED; } EXPORT_SYMBOL_GPL(wm_adsp2_bus_error);