From 7d388551b6888f3725e6c957f472526b35161a5b Mon Sep 17 00:00:00 2001 From: Michael Walle Date: Thu, 11 Aug 2022 00:06:48 +0200 Subject: mtd: spi-nor: hide jedec_id sysfs attribute if not present Some non-jedec compliant flashes (like the Everspin flashes) don't have an ID at all. Hide the attribute in this case. Fixes: 36ac02286265 ("mtd: spi-nor: add initial sysfs support") Signed-off-by: Michael Walle Signed-off-by: Tudor Ambarus Reviewed-by: Takahiro Kuwano Link: https://lore.kernel.org/r/20220810220654.1297699-2-michael@walle.cc --- drivers/mtd/spi-nor/sysfs.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'drivers') diff --git a/drivers/mtd/spi-nor/sysfs.c b/drivers/mtd/spi-nor/sysfs.c index 9aec9d8a98ad..4c3b351aef24 100644 --- a/drivers/mtd/spi-nor/sysfs.c +++ b/drivers/mtd/spi-nor/sysfs.c @@ -67,6 +67,19 @@ static struct bin_attribute *spi_nor_sysfs_bin_entries[] = { NULL }; +static umode_t spi_nor_sysfs_is_visible(struct kobject *kobj, + struct attribute *attr, int n) +{ + struct spi_device *spi = to_spi_device(kobj_to_dev(kobj)); + struct spi_mem *spimem = spi_get_drvdata(spi); + struct spi_nor *nor = spi_mem_get_drvdata(spimem); + + if (attr == &dev_attr_jedec_id.attr && !nor->info->id_len) + return 0; + + return 0444; +} + static umode_t spi_nor_sysfs_is_bin_visible(struct kobject *kobj, struct bin_attribute *attr, int n) { @@ -82,6 +95,7 @@ static umode_t spi_nor_sysfs_is_bin_visible(struct kobject *kobj, static const struct attribute_group spi_nor_sysfs_group = { .name = "spi-nor", + .is_visible = spi_nor_sysfs_is_visible, .is_bin_visible = spi_nor_sysfs_is_bin_visible, .attrs = spi_nor_sysfs_entries, .bin_attrs = spi_nor_sysfs_bin_entries, -- cgit v1.2.3