linux-kernel - [PATCH 1/1] mmc: core: Use dev_err

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Message-Id: <20240911090910.3060749-1-alexander.stein@ew.tq-group.com>
Date: Wed, 11 Sep 2024 11:09:09 +0200
From: Alexander Stein <alexander.stein@...tq-group.com>
To: Ulf Hansson <ulf.hansson@...aro.org>
Cc: Alexander Stein <alexander.stein@...tq-group.com>,
	linux-mmc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/1] mmc: core: Use dev_err_probe for deferred regulators

In case vmmc or vqmmc regulator is not available yet, use dev_err_probe
in order to set a deferred probe reason. This is a helpful hint in
/sys/kernel/debug/devices_deferred

Signed-off-by: Alexander Stein <alexander.stein@...tq-group.com>
---
 drivers/mmc/core/regulator.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/core/regulator.c b/drivers/mmc/core/regulator.c
index 005247a49e51b..01747ab1024ec 100644
--- a/drivers/mmc/core/regulator.c
+++ b/drivers/mmc/core/regulator.c
@@ -255,7 +255,9 @@ int mmc_regulator_get_supply(struct mmc_host *mmc)
 
 	if (IS_ERR(mmc->supply.vmmc)) {
 		if (PTR_ERR(mmc->supply.vmmc) == -EPROBE_DEFER)
-			return -EPROBE_DEFER;
+			return dev_err_probe(dev, -EPROBE_DEFER,
+					     "vmmc regulator not available\n");
+
 		dev_dbg(dev, "No vmmc regulator found\n");
 	} else {
 		ret = mmc_regulator_get_ocrmask(mmc->supply.vmmc);
@@ -267,7 +269,9 @@ int mmc_regulator_get_supply(struct mmc_host *mmc)
 
 	if (IS_ERR(mmc->supply.vqmmc)) {
 		if (PTR_ERR(mmc->supply.vqmmc) == -EPROBE_DEFER)
-			return -EPROBE_DEFER;
+			return dev_err_probe(dev, -EPROBE_DEFER,
+					     "vqmmc regulator not available\n");
+
 		dev_dbg(dev, "No vqmmc regulator found\n");
 	}
 
-- 
2.34.1