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SubjectRe: [PATCH 1/3] hv: hv_util: move vmbus_open() to a later place
Date
Dexuan Cui <decui@microsoft.com> writes:

> Before the line vmbus_open() returns, srv->util_cb can be already running
> and the variablies, like util_fw_version, are needed by the srv->util_cb.
>
> So we have to make sure the variables are initialized before the vmbus_open().
>
> CC: "K. Y. Srinivasan" <kys@microsoft.com>
> Signed-off-by: Dexuan Cui <decui@microsoft.com>

It is not said in the description but moving hv_set_drvdata() before
vmbus_open() make sense in case probe and remove can collide (can
they?).

Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>

> ---
> drivers/hv/hv_util.c | 11 ++++++-----
> 1 file changed, 6 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c
> index 3b9c9ef..c5be773 100644
> --- a/drivers/hv/hv_util.c
> +++ b/drivers/hv/hv_util.c
> @@ -340,12 +340,8 @@ static int util_probe(struct hv_device *dev,
>
> set_channel_read_state(dev->channel, false);
>
> - ret = vmbus_open(dev->channel, 4 * PAGE_SIZE, 4 * PAGE_SIZE, NULL, 0,
> - srv->util_cb, dev->channel);
> - if (ret)
> - goto error;
> -
> hv_set_drvdata(dev, srv);
> +
> /*
> * Based on the host; initialize the framework and
> * service version numbers we will negotiate.
> @@ -365,6 +361,11 @@ static int util_probe(struct hv_device *dev,
> hb_srv_version = HB_VERSION;
> }
>
> + ret = vmbus_open(dev->channel, 4 * PAGE_SIZE, 4 * PAGE_SIZE, NULL, 0,
> + srv->util_cb, dev->channel);
> + if (ret)
> + goto error;
> +
> return 0;
>
> error:

--
Vitaly


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