[PATCH 1/6] ASoC: stm32: sai: manage error when getting reset controller

[Olivier Moysan]

Return an error when the SAI driver fails to get a reset controller.
Also add an error trace, except on probe defer status.

Signed-off-by: Etienne Carriere <etienne.carriere@xxxxxx>
Signed-off-by: Olivier Moysan <olivier.moysan@xxxxxx>
---
 sound/soc/stm/stm32_sai.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/sound/soc/stm/stm32_sai.c b/sound/soc/stm/stm32_sai.c
index e20267504b16..b824ba6cb028 100644
--- a/sound/soc/stm/stm32_sai.c
+++ b/sound/soc/stm/stm32_sai.c
@@ -197,12 +197,16 @@ static int stm32_sai_probe(struct platform_device *pdev)
 		return sai->irq;
 
 	/* reset */
-	rst = devm_reset_control_get_exclusive(&pdev->dev, NULL);
-	if (!IS_ERR(rst)) {
-		reset_control_assert(rst);
-		udelay(2);
-		reset_control_deassert(rst);
+	rst = devm_reset_control_get_optional_exclusive(&pdev->dev, NULL);
+	if (IS_ERR(rst)) {
+		if (PTR_ERR(rst) != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "Reset controller error %ld\n",
+				PTR_ERR(rst));
+		return PTR_ERR(rst);
 	}
+	reset_control_assert(rst);
+	udelay(2);
+	reset_control_deassert(rst);
 
 	/* Enable peripheral clock to allow register access */
 	ret = clk_prepare_enable(sai->pclk);
-- 
2.17.1