On 2021/3/1 20:07, Andy Shevchenko wrote:
On Mon, Mar 01, 2021 at 02:41:35PM +0800, Jie Deng wrote:
Add an I2C bus driver for virtio para-virtualization.
The controller can be emulated by the backend driver in
any device model software by following the virtio protocol.
The device specification can be found on
https://lists.oasis-open.org/archives/virtio-comment/202101/msg00008.html.
By following the specification, people may implement different
backend drivers to emulate different controllers according to
their needs.
...
+ buf = kzalloc(msgs[i].len, GFP_KERNEL);
+ if (!buf)
+ break;
+
+ if (msgs[i].flags & I2C_M_RD) {
kzalloc()
+ reqs[i].read_buf = buf;
+ sg_init_one(&msg_buf, reqs[i].read_buf, msgs[i].len);
+ sgs[outcnt + incnt++] = &msg_buf;
+ } else {
+ reqs[i].write_buf = buf;
+ memcpy(reqs[i].write_buf, msgs[i].buf, msgs[i].len);
kmemdup() ?
Do you mean using "kzalloc" in the if condition and "kmemdup" in the
else condition ?
Then we have to check the NULL twice which is also not good.
+ sg_init_one(&msg_buf, reqs[i].write_buf, msgs[i].len);
+ sgs[outcnt++] = &msg_buf;
+ }
...
+
+
One blank line is enough.
Will fix it. Thank you.
...
+ ret = virtio_i2c_send_reqs(vq, reqs, msgs, num);
+ if (ret == 0)
+ goto err_unlock_free;
+ else
Redundant.
Good catch !
+ nr = ret;
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