[PATCH] xen/pciback: use sysfs_emit_at() instead of scnprintf()

[<tang.dongxing@xxxxxxxxxx>]

From: TangDongxing <tang.dongxing@xxxxxxxxxx>

Follow the advice in Documentation/filesystems/sysfs.rst:
show() should only use sysfs_emit() or sysfs_emit_at() when formatting
the value to be returned to user space.

Signed-off-by: TangDongxing <tang.dongxing@xxxxxxxxxx>
---
 drivers/xen/xen-pciback/pci_stub.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/xen/xen-pciback/pci_stub.c 
b/drivers/xen/xen-pciback/pci_stub.c
index b616b7768c3b..a0782a74ed34 100644
--- a/drivers/xen/xen-pciback/pci_stub.c
+++ b/drivers/xen/xen-pciback/pci_stub.c
@@ -1281,7 +1281,7 @@ static ssize_t slots_show(struct device_driver *drv, char 
*buf)
                if (count >= PAGE_SIZE)
                        break;

-               count += scnprintf(buf + count, PAGE_SIZE - count,
+               count += sysfs_emit_at(buf, count,
                                   "%04x:%02x:%02x.%d\n",
                                   pci_dev_id->domain, pci_dev_id->bus,
                                   PCI_SLOT(pci_dev_id->devfn),
-- 
2.25.1