On Fri, Jul 18, 2025 at 09:00:13PM +0530, Akhilesh Patil wrote:

Replace scnprintf() with sysfs_emit() while formatting buffer that is passed to userspace as per the recommendation in Documentation/filesystems/sysfs.rst. sysfs _show() callbacks should use sysfs_emit() or sysfs_emit_at() while returning values to the userspace. This change does not impact functionality, but aligns with sysfs interface usage guidelines for the tee driver.

Signed-off-by: Akhilesh Patil akhilesh@ee.iitb.ac.in

drivers/tee/optee/core.c | 2 +- drivers/tee/tee_core.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)

Nice catch.

Reviewed-by: Sumit Garg sumit.garg@oss.qualcomm.com

-Sumit

diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c index c75fddc83576..ce44e3498d37 100644 --- a/drivers/tee/optee/core.c +++ b/drivers/tee/optee/core.c @@ -72,7 +72,7 @@ static ssize_t rpmb_routing_model_show(struct device *dev, else s = "user";

• return scnprintf(buf, PAGE_SIZE, "%s\n", s);

• return sysfs_emit(buf, "%s\n", s);

} static DEVICE_ATTR_RO(rpmb_routing_model); diff --git a/drivers/tee/tee_core.c b/drivers/tee/tee_core.c index acc7998758ad..944f913f8592 100644 --- a/drivers/tee/tee_core.c +++ b/drivers/tee/tee_core.c @@ -977,7 +977,7 @@ static ssize_t implementation_id_show(struct device *dev, struct tee_ioctl_version_data vers; teedev->desc->ops->get_version(teedev, &vers);

• return scnprintf(buf, PAGE_SIZE, "%d\n", vers.impl_id);

• return sysfs_emit(buf, "%d\n", vers.impl_id);

} static DEVICE_ATTR_RO(implementation_id); -- 2.34.1