[PATCH] hwrng: core: Convert sprintf/snprintf to sysfs_emit

[Li Zhijian]

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: Olivia Mackall <olivia@xxxxxxxxxxx>
CC: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
CC: linux-crypto@xxxxxxxxxxxxxxx
Signed-off-by: Li Zhijian <lizhijian@xxxxxxxxxxx>
---
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/20240116041129.3937800-1-lizhijian@xxxxxxxxxxx/
---
 drivers/char/hw_random/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c
index a3bbdd6e60fc..f5c71a617a99 100644
--- a/drivers/char/hw_random/core.c
+++ b/drivers/char/hw_random/core.c
@@ -382,7 +382,7 @@ static ssize_t rng_current_show(struct device *dev,
 	if (IS_ERR(rng))
 		return PTR_ERR(rng);
 
-	ret = snprintf(buf, PAGE_SIZE, "%s\n", rng ? rng->name : "none");
+	ret = sysfs_emit(buf, "%s\n", rng ? rng->name : "none");
 	put_rng(rng);
 
 	return ret;
-- 
2.29.2