[PATCH -next v2] remoteproc: stm32: Clean up redundant dev_err_probe()

[Chen Jiahao <chenjiahao16@huawei.com>]

Referring to platform_get_irq()'s definition, the return value has
already been checked if ret < 0, and printed via dev_err_probe().
Calling dev_err_probe() one more time outside platform_get_irq()
is obviously redundant. Removing outside dev_err_probe() to
clean it up.

Besides, switch to use platform_get_irq_optional() since the irq
is optional here.

Signed-off-by: Chen Jiahao <chenjiahao16@huawei.com>
---
 drivers/remoteproc/stm32_rproc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c
index 98234b44f038..1f53c672c66b 100644
--- a/drivers/remoteproc/stm32_rproc.c
+++ b/drivers/remoteproc/stm32_rproc.c
@@ -712,9 +712,9 @@ static int stm32_rproc_parse_dt(struct platform_device *pdev,
 	unsigned int tzen;
 	int err, irq;
 
-	irq = platform_get_irq(pdev, 0);
+	irq = platform_get_irq_optional(pdev, 0);
 	if (irq == -EPROBE_DEFER)
-		return dev_err_probe(dev, irq, "failed to get interrupt\n");
+		return irq;
 
 	if (irq > 0) {
 		err = devm_request_irq(dev, irq, stm32_rproc_wdg, 0,
-- 
2.34.1