linux-kernel - [PATCH v4] mtd: spi-nor: Improve reporting for software reset failures

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Date:   Thu, 26 Oct 2023 09:20:17 +0800
From:   AceLan Kao <acelan.kao@...onical.com>
To:     Tudor Ambarus <tudor.ambarus@...aro.org>,
        Pratyush Yadav <pratyush@...nel.org>,
        Michael Walle <michael@...le.cc>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v4] mtd: spi-nor: Improve reporting for software reset failures

From: "Chia-Lin Kao (AceLan)" <acelan.kao@...onical.com>

When the software reset command isn't supported, we now report it
as an informational message(dev_info) instead of a warning(dev_warn).
This adjustment helps avoid unnecessary alarm and confusion regarding
software reset capabilities.

Signed-off-by: Chia-Lin Kao (AceLan) <acelan.kao@...onical.com>
---
v2. only lower the priority for the not supported failure
v3. replace ENOTSUPP with EOPNOTSUPP and check the first command only
v4. move the version information below the '---' line
---
 drivers/mtd/spi-nor/core.c | 5 ++++-
 drivers/spi/spi-mem.c      | 2 +-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index 1b0c6770c14e..42e52af76289 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -3252,7 +3252,10 @@ static void spi_nor_soft_reset(struct spi_nor *nor)
 
 	ret = spi_mem_exec_op(nor->spimem, &op);
 	if (ret) {
-		dev_warn(nor->dev, "Software reset failed: %d\n", ret);
+		if (ret == -EOPNOTSUPP)
+			dev_info(nor->dev, "Software reset enable command doesn't support: %d\n", ret);
+		else
+			dev_warn(nor->dev, "Software reset failed: %d\n", ret);
 		return;
 	}
 
diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c
index edd7430d4c05..93b77ac0b798 100644
--- a/drivers/spi/spi-mem.c
+++ b/drivers/spi/spi-mem.c
@@ -323,7 +323,7 @@ int spi_mem_exec_op(struct spi_mem *mem, const struct spi_mem_op *op)
 		return ret;
 
 	if (!spi_mem_internal_supports_op(mem, op))
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 
 	if (ctlr->mem_ops && ctlr->mem_ops->exec_op && !spi_get_csgpiod(mem->spi, 0)) {
 		ret = spi_mem_access_start(mem);
-- 
2.34.1