Per filesystems/sysfs.rst, show() should only use sysfs_emit() or sysfs_emit_at() when formatting the value to be returned to user space.
coccinelle complains that there are still a couple of functions that use snprintf(). Convert them to sysfs_emit(). sprintf() will be converted as weel if they have. Generally, this patch is generated by make coccicheck M=<path/to/file> MODE=patch \ COCCI=scripts/coccinelle/api/device_attr_show.cocci No functional change intended CC: "Michael S. Tsirkin" <[email protected]> CC: Jason Wang <[email protected]> CC: Xuan Zhuo <[email protected]> CC: [email protected] Signed-off-by: Li Zhijian <[email protected]> --- This is a part of the work "Fix coccicheck device_attr_show warnings"[1] Split them per subsystem so that the maintainer can review it easily [1] https://lore.kernel.org/lkml/[email protected]/ --- drivers/vdpa/vdpa.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c index d0695680b282..7b82b9aa91e9 100644 --- a/drivers/vdpa/vdpa.c +++ b/drivers/vdpa/vdpa.c @@ -98,7 +98,7 @@ static ssize_t driver_override_show(struct device *dev, ssize_t len; device_lock(dev); - len = snprintf(buf, PAGE_SIZE, "%s\n", vdev->driver_override); + len = sysfs_emit(buf, "%s\n", vdev->driver_override); device_unlock(dev); return len; -- 2.29.2
