| Message ID | 20200924032125.18619-3-jasowang@redhat.com |
|---|---|
| State | New |
| Headers | show |
| Series | Control VQ support in vDPA | expand |
On Thu, Sep 24, 2020 at 11:21:03AM +0800, Jason Wang wrote: > We need to free vqs during the err path after it has been allocated > since vhost won't do that for us. > > Signed-off-by: Jason Wang <jasowang@redhat.com> > --- > drivers/vhost/vdpa.c | 11 ++++++++--- > 1 file changed, 8 insertions(+), 3 deletions(-) > > diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c > index 796fe979f997..9c641274b9f3 100644 > --- a/drivers/vhost/vdpa.c > +++ b/drivers/vhost/vdpa.c > @@ -764,6 +764,12 @@ static void vhost_vdpa_free_domain(struct vhost_vdpa *v) > v->domain = NULL; > } > > +static void vhost_vdpa_cleanup(struct vhost_vdpa *v) > +{ > + vhost_dev_cleanup(&v->vdev); > + kfree(v->vdev.vqs); > +} > + Wouldn't it be cleaner to call kfree(vqs) explicilty inside vhost_vdpa_open() in case of failure and keep the symetry of vhost_dev_init()/vhost_dev_cleanup()? > static int vhost_vdpa_open(struct inode *inode, struct file *filep) > { > struct vhost_vdpa *v; > @@ -809,7 +815,7 @@ static int vhost_vdpa_open(struct inode *inode, struct file *filep) > return 0; > > err_init_iotlb: > - vhost_dev_cleanup(&v->vdev); > + vhost_vdpa_cleanup(v); > err: > atomic_dec(&v->opened); > return r; > @@ -840,8 +846,7 @@ static int vhost_vdpa_release(struct inode *inode, struct file *filep) > vhost_vdpa_free_domain(v); > vhost_vdpa_config_put(v); > vhost_vdpa_clean_irq(v); > - vhost_dev_cleanup(&v->vdev); > - kfree(v->vdev.vqs); > + vhost_vdpa_cleanup(v); > mutex_unlock(&d->mutex); > > atomic_dec(&v->opened); > -- > 2.20.1 >
On Thu, Sep 24, 2020 at 11:21:03AM +0800, Jason Wang wrote: > We need to free vqs during the err path after it has been allocated > since vhost won't do that for us. > > Signed-off-by: Jason Wang <jasowang@redhat.com> This is a bugfix too right? I don't see it posted separately ... > --- > drivers/vhost/vdpa.c | 11 ++++++++--- > 1 file changed, 8 insertions(+), 3 deletions(-) > > diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c > index 796fe979f997..9c641274b9f3 100644 > --- a/drivers/vhost/vdpa.c > +++ b/drivers/vhost/vdpa.c > @@ -764,6 +764,12 @@ static void vhost_vdpa_free_domain(struct vhost_vdpa *v) > v->domain = NULL; > } > > +static void vhost_vdpa_cleanup(struct vhost_vdpa *v) > +{ > + vhost_dev_cleanup(&v->vdev); > + kfree(v->vdev.vqs); > +} > + > static int vhost_vdpa_open(struct inode *inode, struct file *filep) > { > struct vhost_vdpa *v; > @@ -809,7 +815,7 @@ static int vhost_vdpa_open(struct inode *inode, struct file *filep) > return 0; > > err_init_iotlb: > - vhost_dev_cleanup(&v->vdev); > + vhost_vdpa_cleanup(v); > err: > atomic_dec(&v->opened); > return r; > @@ -840,8 +846,7 @@ static int vhost_vdpa_release(struct inode *inode, struct file *filep) > vhost_vdpa_free_domain(v); > vhost_vdpa_config_put(v); > vhost_vdpa_clean_irq(v); > - vhost_dev_cleanup(&v->vdev); > - kfree(v->vdev.vqs); > + vhost_vdpa_cleanup(v); > mutex_unlock(&d->mutex); > > atomic_dec(&v->opened); > -- > 2.20.1
On 2020/9/24 下午5:31, Michael S. Tsirkin wrote: > On Thu, Sep 24, 2020 at 11:21:03AM +0800, Jason Wang wrote: >> We need to free vqs during the err path after it has been allocated >> since vhost won't do that for us. >> >> Signed-off-by: Jason Wang <jasowang@redhat.com> > This is a bugfix too right? I don't see it posted separately ... A patch that is functional equivalent is posted here: https://www.mail-archive.com/virtualization@lists.linux-foundation.org/msg42558.html I'm a little bit lazy to use that one since this patch is probably wrote before that one. Thanks > >> --- >> drivers/vhost/vdpa.c | 11 ++++++++--- >> 1 file changed, 8 insertions(+), 3 deletions(-) >> >> diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c >> index 796fe979f997..9c641274b9f3 100644 >> --- a/drivers/vhost/vdpa.c >> +++ b/drivers/vhost/vdpa.c >> @@ -764,6 +764,12 @@ static void vhost_vdpa_free_domain(struct vhost_vdpa *v) >> v->domain = NULL; >> } >> >> +static void vhost_vdpa_cleanup(struct vhost_vdpa *v) >> +{ >> + vhost_dev_cleanup(&v->vdev); >> + kfree(v->vdev.vqs); >> +} >> + >> static int vhost_vdpa_open(struct inode *inode, struct file *filep) >> { >> struct vhost_vdpa *v; >> @@ -809,7 +815,7 @@ static int vhost_vdpa_open(struct inode *inode, struct file *filep) >> return 0; >> >> err_init_iotlb: >> - vhost_dev_cleanup(&v->vdev); >> + vhost_vdpa_cleanup(v); >> err: >> atomic_dec(&v->opened); >> return r; >> @@ -840,8 +846,7 @@ static int vhost_vdpa_release(struct inode *inode, struct file *filep) >> vhost_vdpa_free_domain(v); >> vhost_vdpa_config_put(v); >> vhost_vdpa_clean_irq(v); >> - vhost_dev_cleanup(&v->vdev); >> - kfree(v->vdev.vqs); >> + vhost_vdpa_cleanup(v); >> mutex_unlock(&d->mutex); >> >> atomic_dec(&v->opened); >> -- >> 2.20.1
On 2020/9/24 下午3:48, Eli Cohen wrote: > On Thu, Sep 24, 2020 at 11:21:03AM +0800, Jason Wang wrote: >> We need to free vqs during the err path after it has been allocated >> since vhost won't do that for us. >> >> Signed-off-by: Jason Wang <jasowang@redhat.com> >> --- >> drivers/vhost/vdpa.c | 11 ++++++++--- >> 1 file changed, 8 insertions(+), 3 deletions(-) >> >> diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c >> index 796fe979f997..9c641274b9f3 100644 >> --- a/drivers/vhost/vdpa.c >> +++ b/drivers/vhost/vdpa.c >> @@ -764,6 +764,12 @@ static void vhost_vdpa_free_domain(struct vhost_vdpa *v) >> v->domain = NULL; >> } >> >> +static void vhost_vdpa_cleanup(struct vhost_vdpa *v) >> +{ >> + vhost_dev_cleanup(&v->vdev); >> + kfree(v->vdev.vqs); >> +} >> + > Wouldn't it be cleaner to call kfree(vqs) explicilty inside > vhost_vdpa_open() in case of failure and keep the symetry of > vhost_dev_init()/vhost_dev_cleanup()? That's also fine. See https://www.mail-archive.com/virtualization@lists.linux-foundation.org/msg42558.html I will use that for the next version. Thanks. > >> static int vhost_vdpa_open(struct inode *inode, struct file *filep) >> { >> struct vhost_vdpa *v; >> @@ -809,7 +815,7 @@ static int vhost_vdpa_open(struct inode *inode, struct file *filep) >> return 0; >> >> err_init_iotlb: >> - vhost_dev_cleanup(&v->vdev); >> + vhost_vdpa_cleanup(v); >> err: >> atomic_dec(&v->opened); >> return r; >> @@ -840,8 +846,7 @@ static int vhost_vdpa_release(struct inode *inode, struct file *filep) >> vhost_vdpa_free_domain(v); >> vhost_vdpa_config_put(v); >> vhost_vdpa_clean_irq(v); >> - vhost_dev_cleanup(&v->vdev); >> - kfree(v->vdev.vqs); >> + vhost_vdpa_cleanup(v); >> mutex_unlock(&d->mutex); >> >> atomic_dec(&v->opened); >> -- >> 2.20.1 >>
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index 796fe979f997..9c641274b9f3 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -764,6 +764,12 @@ static void vhost_vdpa_free_domain(struct vhost_vdpa *v) v->domain = NULL; } +static void vhost_vdpa_cleanup(struct vhost_vdpa *v) +{ + vhost_dev_cleanup(&v->vdev); + kfree(v->vdev.vqs); +} + static int vhost_vdpa_open(struct inode *inode, struct file *filep) { struct vhost_vdpa *v; @@ -809,7 +815,7 @@ static int vhost_vdpa_open(struct inode *inode, struct file *filep) return 0; err_init_iotlb: - vhost_dev_cleanup(&v->vdev); + vhost_vdpa_cleanup(v); err: atomic_dec(&v->opened); return r; @@ -840,8 +846,7 @@ static int vhost_vdpa_release(struct inode *inode, struct file *filep) vhost_vdpa_free_domain(v); vhost_vdpa_config_put(v); vhost_vdpa_clean_irq(v); - vhost_dev_cleanup(&v->vdev); - kfree(v->vdev.vqs); + vhost_vdpa_cleanup(v); mutex_unlock(&d->mutex); atomic_dec(&v->opened);
We need to free vqs during the err path after it has been allocated since vhost won't do that for us. Signed-off-by: Jason Wang <jasowang@redhat.com> --- drivers/vhost/vdpa.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-)