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Diffstat (limited to 'drivers/virtio/virtio.c')
-rw-r--r--drivers/virtio/virtio.c45
1 files changed, 0 insertions, 45 deletions
diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c
index 69d7ea02cd48..303cb6f90108 100644
--- a/drivers/virtio/virtio.c
+++ b/drivers/virtio/virtio.c
@@ -148,51 +148,6 @@ void unregister_virtio_device(struct virtio_device *dev)
148} 148}
149EXPORT_SYMBOL_GPL(unregister_virtio_device); 149EXPORT_SYMBOL_GPL(unregister_virtio_device);
150 150
151int __virtio_config_val(struct virtio_device *vdev,
152 u8 type, void *val, size_t size)
153{
154 void *token;
155 unsigned int len;
156
157 token = vdev->config->find(vdev, type, &len);
158 if (!token)
159 return -ENOENT;
160
161 if (len != size)
162 return -EIO;
163
164 vdev->config->get(vdev, token, val, size);
165 return 0;
166}
167EXPORT_SYMBOL_GPL(__virtio_config_val);
168
169int virtio_use_bit(struct virtio_device *vdev,
170 void *token, unsigned int len, unsigned int bitnum)
171{
172 unsigned long bits[16];
173
174 /* This makes it convenient to pass-through find() results. */
175 if (!token)
176 return 0;
177
178 /* bit not in range of this bitfield? */
179 if (bitnum * 8 >= len / 2)
180 return 0;
181
182 /* Giant feature bitfields are silly. */
183 BUG_ON(len > sizeof(bits));
184 vdev->config->get(vdev, token, bits, len);
185
186 if (!test_bit(bitnum, bits))
187 return 0;
188
189 /* Set acknowledge bit, and write it back. */
190 set_bit(bitnum + len * 8 / 2, bits);
191 vdev->config->set(vdev, token, bits, len);
192 return 1;
193}
194EXPORT_SYMBOL_GPL(virtio_use_bit);
195
196static int virtio_init(void) 151static int virtio_init(void)
197{ 152{
198 if (bus_register(&virtio_bus) != 0) 153 if (bus_register(&virtio_bus) != 0)