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authorJason Gunthorpe <jgg@nvidia.com>2021-04-06 22:40:35 +0300
committerAlex Williamson <alex.williamson@redhat.com>2021-04-08 00:39:19 +0300
commitc594b26ff78e2cb315101ade73155baf868158eb (patch)
tree49aade9927c8068f58fae10b0b41f7af14c095da /samples/vfio-mdev
parent15fcc44be0c7afa2945b1896a96ac2ddf09f1fa7 (diff)
downloadlinux-c594b26ff78e2cb315101ade73155baf868158eb.tar.xz
vfio/mtty: Use mdev_get_type_group_id()
The type_group_id directly gives the single or dual port index, no need for string searching. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Message-Id: <12-v2-d36939638fc6+d54-vfio2_jgg@nvidia.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'samples/vfio-mdev')
-rw-r--r--samples/vfio-mdev/mtty.c50
1 files changed, 7 insertions, 43 deletions
diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c
index ce84a300a4da..191a587a8d5a 100644
--- a/samples/vfio-mdev/mtty.c
+++ b/samples/vfio-mdev/mtty.c
@@ -711,23 +711,7 @@ accessfailed:
static int mtty_create(struct kobject *kobj, struct mdev_device *mdev)
{
struct mdev_state *mdev_state;
- char name[MTTY_STRING_LEN];
- int nr_ports = 0, i;
-
- if (!mdev)
- return -EINVAL;
-
- for (i = 0; i < 2; i++) {
- snprintf(name, MTTY_STRING_LEN, "%s-%d",
- dev_driver_string(mdev_parent_dev(mdev)), i + 1);
- if (!strcmp(kobj->name, name)) {
- nr_ports = i + 1;
- break;
- }
- }
-
- if (!nr_ports)
- return -EINVAL;
+ int nr_ports = mdev_get_type_group_id(mdev) + 1;
mdev_state = kzalloc(sizeof(struct mdev_state), GFP_KERNEL);
if (mdev_state == NULL)
@@ -1311,18 +1295,11 @@ static const struct attribute_group *mdev_dev_groups[] = {
static ssize_t
name_show(struct kobject *kobj, struct device *dev, char *buf)
{
- char name[MTTY_STRING_LEN];
- int i;
- const char *name_str[2] = {"Single port serial", "Dual port serial"};
+ static const char *name_str[2] = { "Single port serial",
+ "Dual port serial" };
- for (i = 0; i < 2; i++) {
- snprintf(name, MTTY_STRING_LEN, "%s-%d",
- dev_driver_string(dev), i + 1);
- if (!strcmp(kobj->name, name))
- return sprintf(buf, "%s\n", name_str[i]);
- }
-
- return -EINVAL;
+ return sysfs_emit(buf, "%s\n",
+ name_str[mtype_get_type_group_id(kobj)]);
}
static MDEV_TYPE_ATTR_RO(name);
@@ -1330,22 +1307,9 @@ static MDEV_TYPE_ATTR_RO(name);
static ssize_t
available_instances_show(struct kobject *kobj, struct device *dev, char *buf)
{
- char name[MTTY_STRING_LEN];
- int i;
struct mdev_state *mds;
- int ports = 0, used = 0;
-
- for (i = 0; i < 2; i++) {
- snprintf(name, MTTY_STRING_LEN, "%s-%d",
- dev_driver_string(dev), i + 1);
- if (!strcmp(kobj->name, name)) {
- ports = i + 1;
- break;
- }
- }
-
- if (!ports)
- return -EINVAL;
+ unsigned int ports = mtype_get_type_group_id(kobj) + 1;
+ int used = 0;
list_for_each_entry(mds, &mdev_devices_list, next)
used += mds->nr_ports;