linux-kernel - [PATCH 3/4] mtd: spi-nor: sysfs: hide the flash name if not set

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Message-Id: <20231215082138.16063-4-tudor.ambarus@linaro.org>
Date: Fri, 15 Dec 2023 10:21:37 +0200
From: Tudor Ambarus <tudor.ambarus@...aro.org>
To: pratyush@...nel.org,
	michael@...le.cc,
	miquel.raynal@...tlin.com
Cc: richard@....at,
	jaimeliao@...c.com.tw,
	linux-mtd@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Tudor Ambarus <tudor.ambarus@...aro.org>
Subject: [PATCH 3/4] mtd: spi-nor: sysfs: hide the flash name if not set

From: JaimeLiao <jaimeliao@...c.com.tw>

The flash name is not reliable as we saw flash ID collisions.
Hide the flash name if not set.

Signed-off-by: JaimeLiao <jaimeliao@...c.com.tw>
[ta: update commit subject and description]
Signed-off-by: Tudor Ambarus <tudor.ambarus@...aro.org>
---
 Documentation/ABI/testing/sysfs-bus-spi-devices-spi-nor | 3 +++
 drivers/mtd/spi-nor/sysfs.c                             | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-bus-spi-devices-spi-nor b/Documentation/ABI/testing/sysfs-bus-spi-devices-spi-nor
index c800621eff95..6d7be97bf7d1 100644
--- a/Documentation/ABI/testing/sysfs-bus-spi-devices-spi-nor
+++ b/Documentation/ABI/testing/sysfs-bus-spi-devices-spi-nor
@@ -25,6 +25,9 @@ KernelVersion:	5.14
 Contact:	linux-mtd@...ts.infradead.org
 Description:	(RO) Part name of the SPI NOR flash.
 
+		The attribute is not present if the jedec_id founded in
+		ID table but flash name didn't include in it.
+
 
 What:		/sys/bus/spi/devices/.../spi-nor/sfdp
 Date:		April 2021
diff --git a/drivers/mtd/spi-nor/sysfs.c b/drivers/mtd/spi-nor/sysfs.c
index 2dfdc555a69f..96064e4babf0 100644
--- a/drivers/mtd/spi-nor/sysfs.c
+++ b/drivers/mtd/spi-nor/sysfs.c
@@ -78,6 +78,8 @@ static umode_t spi_nor_sysfs_is_visible(struct kobject *kobj,
 
 	if (attr == &dev_attr_manufacturer.attr && !nor->manufacturer)
 		return 0;
+	if (attr == &dev_attr_partname.attr && !nor->info->name)
+		return 0;
 	if (attr == &dev_attr_jedec_id.attr && !nor->info->id && !nor->id)
 		return 0;
 
-- 
2.34.1