[PATCH AUTOSEL 6.10 4/7] driver core: Make dev_err_probe() silent for -ENOMEM

Sasha Levin
2024-07-30T12:45:27Z

From: Uwe Kleine-König <u.kleine-koenig@baylibre.com>

[ Upstream commit 2f3cfd2f4b7cf3026fe6b9b2a5320cc18f4c184e ]

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@baylibre.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/3d1e308d45cddf67749522ca42d83f5b4f0b9634.1718311756.git.u.kleine-koenig@baylibre.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 2b4c0624b7043..730cae66607c0 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -5021,11 +5021,22 @@ 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);
--
2.43.0