Re: [PATCH 1/4] vdpa: Protect vdpa reset with cf_mutex

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Tue, Jan 11, 2022 at 09:22:17AM +0200, Eli Cohen wrote:
> Call reset using the wrapper function vdpa_reset() to make sure the
> operation is serialized with cf_mutex.
> 
> Signed-off-by: Eli Cohen <elic@xxxxxxxxxx>

The motivation is vague here, this does not really explain.
Which operations are we trying to serialize?
Multiple reset requests from userspace?
Is anything broken right now without this patch?

> ---
>  drivers/vhost/vdpa.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
> index 6e7edaf2472b..fe0bbea4dab6 100644
> --- a/drivers/vhost/vdpa.c
> +++ b/drivers/vhost/vdpa.c
> @@ -155,7 +155,6 @@ static long vhost_vdpa_get_status(struct vhost_vdpa *v, u8 __user *statusp)
>  static long vhost_vdpa_set_status(struct vhost_vdpa *v, u8 __user *statusp)
>  {
>  	struct vdpa_device *vdpa = v->vdpa;
> -	const struct vdpa_config_ops *ops = vdpa->config;
>  	u8 status, status_old;
>  	int ret, nvqs = v->nvqs;
>  	u16 i;
> @@ -177,7 +176,7 @@ static long vhost_vdpa_set_status(struct vhost_vdpa *v, u8 __user *statusp)
>  			vhost_vdpa_unsetup_vq_irq(v, i);
>  
>  	if (status == 0) {
> -		ret = ops->reset(vdpa);
> +		ret = vdpa_reset(vdpa);
>  		if (ret)
>  			return ret;
>  	} else
> -- 
> 2.34.1

_______________________________________________
Virtualization mailing list
Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
https://lists.linuxfoundation.org/mailman/listinfo/virtualization



[Index of Archives]     [KVM Development]     [Libvirt Development]     [Libvirt Users]     [CentOS Virtualization]     [Netdev]     [Ethernet Bridging]     [Linux Wireless]     [Kernel Newbies]     [Security]     [Linux for Hams]     [Netfilter]     [Bugtraq]     [Yosemite Forum]     [MIPS Linux]     [ARM Linux]     [Linux RAID]     [Linux Admin]     [Samba]

  Powered by Linux