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ASoC: wm_adsp: Add locking to wm_adsp2_bus_error

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[ Upstream commit a2225a6d15 ]

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>
This commit is contained in:
Charles Keepax
2019-03-19 11:52:06 +00:00
committed by Greg Kroah-Hartman
parent 97916fe0b8
commit 97dac24e68
1 changed files with 8 additions and 3 deletions
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11
sound/soc/codecs/wm_adsp.c
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@@ -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);