On Wed, Apr 15, 2020 at 12:43:08PM +0200, Vitaly Kuznetsov wrote:
> Colin Ian King <colin.king@xxxxxxxxxxxxx> writes:
>
> > On 14/04/2020 17:51, Vitaly Kuznetsov wrote:
> >> Colin King <colin.king@xxxxxxxxxxxxx> writes:
> >>
> >>> From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
> >>>
> >>> The pointer primary_channel is being assigned with a value that is never,
> >>> The assignment is redundant and can be removed.
> >>>
> >>> Addresses-Coverity: ("Unused value")
> >>> Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
> >>> ---
> >>> drivers/hv/channel_mgmt.c | 2 --
> >>> 1 file changed, 2 deletions(-)
> >>>
> >>> diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
> >>> index ffd7fffa5f83..f7bbb8dc4b0f 100644
> >>> --- a/drivers/hv/channel_mgmt.c
> >>> +++ b/drivers/hv/channel_mgmt.c
> >>> @@ -425,8 +425,6 @@ void hv_process_channel_removal(struct vmbus_channel *channel)
> >>>
> >>> if (channel->primary_channel == NULL) {
> >>> list_del(&channel->listentry);
> >>> -
> >>> - primary_channel = channel;
> >>> } else {
> >>> primary_channel = channel->primary_channel;
> >>> spin_lock_irqsave(&primary_channel->lock, flags);
> >>
> >> If I'm looking at the right source (5.7-rc1) it *is* beeing used:
> >>
> >> if (channel->primary_channel == NULL) {
> >> list_del(&channel->listentry);
> >>
> >> primary_channel = channel;
> >> } else {
> >> primary_channel = channel->primary_channel;
> >> spin_lock_irqsave(&primary_channel->lock, flags);
> >> list_del(&channel->sc_list);
> >> spin_unlock_irqrestore(&primary_channel->lock, flags);
> >> }
> >>
> >> /*
> >> * We need to free the bit for init_vp_index() to work in the case
> >> * of sub-channel, when we reload drivers like hv_netvsc.
> >> */
> >> if (channel->affinity_policy == HV_LOCALIZED)
> >> cpumask_clear_cpu(channel->target_cpu,
> >> &primary_channel->alloced_cpus_in_node);
> >> ^^^^^ HERE ^^^^^
> >>
> >
> > I was basing my change on linux-next that has removed a hunk of code:
> >
> > commit bcefa400900739310e8ef0cb34cbe029c404455c
> > Author: Andrea Parri (Microsoft) <parri.andrea@xxxxxxxxx>
> > Date: Mon Apr 6 02:15:11 2020 +0200
> >
> > Drivers: hv: vmbus: Remove the unused HV_LOCALIZED channel affinity
> > logic
> >
>
> Ah, please add the right 'Fixes:' tag then.
I don't think the Fixes tag is particularly useful in this instance.
Andrea's commit is not yet in Linus' tree. If I rebase hyper-next over
the next 2.5 months the tag is going to have a stale commit hash in it.
Wei.
>
> --
> Vitaly
>
