When dynamically allocating sysfs attributes, it's a good idea to call sysfs_attr_init() on them to initialize lock_class_keys. This change does that. The lock_class_keys are set when the CONFIG_DEBUG_LOCK_ALLOC symbol is enabled. Which is [likely] one reason why I did not see this during development. I also am not able to see this even with CONFIG_DEBUG_LOCK_ALLOC enabled, so this may [likely] be reproduce-able on some system configurations. This was reported via: https://lore.kernel.org/linux-iio/CA+U=DsrsvGgXEF30-vXuXS_k=-mjSjiBwEEzwKb1hJVn1P98OA@xxxxxxxxxxxxxx/T/#u Fixes: 15097c7a1adc ("iio: buffer: wrap all buffer attributes into iio_dev_attr") Reported-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> Signed-off-by: Alexandru Ardelean <aardelean@xxxxxxxxxxx> --- @Marek: could you maybe test this on your setup? I haven't been able to reproduce this on mine. Thanks Alex drivers/iio/industrialio-buffer.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index ee5aab9d4a23..06b2ea087408 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -1309,6 +1309,7 @@ static struct attribute *iio_buffer_wrap_attr(struct iio_buffer *buffer, iio_attr->buffer = buffer; memcpy(&iio_attr->dev_attr, dattr, sizeof(iio_attr->dev_attr)); iio_attr->dev_attr.attr.name = kstrdup_const(attr->name, GFP_KERNEL); + sysfs_attr_init(&iio_attr->dev_attr.attr); list_add(&iio_attr->l, &buffer->buffer_attr_list); -- 2.30.2
