[PATCH] driver core: Make dev_err_probe() silent for -ENOMEM

[Uwe Kleine-König]

For an out-of-memory error there should be no additional output. Adapt
dev_err_probe() to not emit the error message when err is -ENOMEM.
This simplifies handling errors that might among others be -ENOMEM.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
---
Hello,

I had the idea to make dev_err_probe() silent for -ENOMEM for a while now. 
Triggered by https://lore.kernel.org/all/ZhleDwUJLDEG5QwH@xxxxxxxxxxxxxxxxxx I
finally implemented this idea.

Best regards
Uwe

 drivers/base/core.c | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 4d51928c4088..8f1914ca6b6e 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -5054,11 +5054,22 @@ int dev_err_probe(const struct device *dev, int err, const char *fmt, ...)
 	vaf.fmt = fmt;
 	vaf.va = &args;
 
-	if (err != -EPROBE_DEFER) {
-		dev_err(dev, "error %pe: %pV", ERR_PTR(err), &vaf);
-	} else {
+	switch (err) {
+	case -EPROBE_DEFER:
 		device_set_deferred_probe_reason(dev, &vaf);
 		dev_dbg(dev, "error %pe: %pV", ERR_PTR(err), &vaf);
+		break;
+
+	case -ENOMEM:
+		/*
+		 * We don't print anything on -ENOMEM, there is already enough
+		 * output.
+		 */
+		break;
+
+	default:
+		dev_err(dev, "error %pe: %pV", ERR_PTR(err), &vaf);
+		break;
 	}
 
 	va_end(args);

base-commit: 4118d9533ff3a5d16efb476a0d00afceecd92cf5
prerequisite-patch-id: 950b86247f1ba5dfc0396d9777d83e641ff62c35
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2.43.0