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virtio_blk: Use sysfs_match_string() helper

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Use sysfs_match_string() helper instead of open coded variant.

Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Andy Shevchenko 2017-06-09 15:07:42 +03:00 committed by Michael S. Tsirkin
parent 520eccdfe1
commit f53d5aa050
1 changed files with 2 additions and 5 deletions
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7
drivers/block/virtio_blk.c
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@ -541,12 +541,9 @@ virtblk_cache_type_store(struct device *dev, struct device_attribute *attr,
int i;
BUG_ON(!virtio_has_feature(vblk->vdev, VIRTIO_BLK_F_CONFIG_WCE));
for (i = ARRAY_SIZE(virtblk_cache_types); --i >= 0; )
if (sysfs_streq(buf, virtblk_cache_types[i]))
break;
i = sysfs_match_string(virtblk_cache_types, buf);
if (i < 0)
return -EINVAL;
return i;
virtio_cwrite8(vdev, offsetof(struct virtio_blk_config, wce), i);
virtblk_update_cache_mode(vdev);