From: Charles Keepax <ckeepax@xxxxxxxxxxxxxxxxxxxxx>
[ 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@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 67330b6ab204..d632a0511d62 100644
--- a/sound/soc/codecs/wm_adsp.c
+++ b/sound/soc/codecs/wm_adsp.c
@@ -3711,11 +3711,13 @@ 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) {
@@ -3734,7 +3736,7 @@ 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",
@@ -3747,7 +3749,7 @@ 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",
@@ -3760,6 +3762,9 @@ 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);
--
2.19.1
