| Message ID | 89d47285e882a99a0513411edcc96aa575512f13.1681710993.git.viresh.kumar@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | virtio: i2c: Check notifier helpers for VIRTIO_CONFIG_IRQ_IDX | expand |
On 17/4/23 08:02, Viresh Kumar wrote: > Since the driver doesn't support interrupts, we must return early when > index is set to VIRTIO_CONFIG_IRQ_IDX. > > Fixes: 544f0278afca ("virtio: introduce macro VIRTIO_CONFIG_IRQ_IDX") > Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> > --- > hw/virtio/vhost-user-i2c.c | 20 ++++++++++++++++++++ > 1 file changed, 20 insertions(+) > > diff --git a/hw/virtio/vhost-user-i2c.c b/hw/virtio/vhost-user-i2c.c > index 60eaf0d95be0..45100a24953c 100644 > --- a/hw/virtio/vhost-user-i2c.c > +++ b/hw/virtio/vhost-user-i2c.c > @@ -128,6 +128,16 @@ static void vu_i2c_guest_notifier_mask(VirtIODevice *vdev, int idx, bool mask) > { > VHostUserI2C *i2c = VHOST_USER_I2C(vdev); > > + /* > + * Add the check for configure interrupt, Use VIRTIO_CONFIG_IRQ_IDX -1 > + * as the Marco of configure interrupt's IDX, If this driver does not Copy/paste of pre-existing comment, still I wonder who is "the Marco of configure" :P > + * support, the function will return > + */
On 17-04-23, 09:36, Philippe Mathieu-Daudé wrote: > On 17/4/23 08:02, Viresh Kumar wrote: > > Since the driver doesn't support interrupts, we must return early when > > index is set to VIRTIO_CONFIG_IRQ_IDX. > > > > Fixes: 544f0278afca ("virtio: introduce macro VIRTIO_CONFIG_IRQ_IDX") > > Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> > > --- > > hw/virtio/vhost-user-i2c.c | 20 ++++++++++++++++++++ > > 1 file changed, 20 insertions(+) > > > > diff --git a/hw/virtio/vhost-user-i2c.c b/hw/virtio/vhost-user-i2c.c > > index 60eaf0d95be0..45100a24953c 100644 > > --- a/hw/virtio/vhost-user-i2c.c > > +++ b/hw/virtio/vhost-user-i2c.c > > @@ -128,6 +128,16 @@ static void vu_i2c_guest_notifier_mask(VirtIODevice *vdev, int idx, bool mask) > > { > > VHostUserI2C *i2c = VHOST_USER_I2C(vdev); > > + /* > > + * Add the check for configure interrupt, Use VIRTIO_CONFIG_IRQ_IDX -1 > > + * as the Marco of configure interrupt's IDX, If this driver does not > > Copy/paste of pre-existing comment, still I wonder who is "the Marco of > configure" :P > > > + * support, the function will return > > + */ Yeah the comment could be improved, I didn't touch it as it was written this way for many drivers :) Maybe a simple comment like is all we need: /* * We don't support interrupts, return early if index is set to * VIRTIO_CONFIG_IRQ_IDX. */
Philippe Mathieu-Daudé <philmd@linaro.org> writes: > On 17/4/23 08:02, Viresh Kumar wrote: >> Since the driver doesn't support interrupts, we must return early when >> index is set to VIRTIO_CONFIG_IRQ_IDX. >> Fixes: 544f0278afca ("virtio: introduce macro >> VIRTIO_CONFIG_IRQ_IDX") >> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> >> --- >> hw/virtio/vhost-user-i2c.c | 20 ++++++++++++++++++++ >> 1 file changed, 20 insertions(+) >> diff --git a/hw/virtio/vhost-user-i2c.c b/hw/virtio/vhost-user-i2c.c >> index 60eaf0d95be0..45100a24953c 100644 >> --- a/hw/virtio/vhost-user-i2c.c >> +++ b/hw/virtio/vhost-user-i2c.c >> @@ -128,6 +128,16 @@ static void vu_i2c_guest_notifier_mask(VirtIODevice *vdev, int idx, bool mask) >> { >> VHostUserI2C *i2c = VHOST_USER_I2C(vdev); >> + /* >> + * Add the check for configure interrupt, Use VIRTIO_CONFIG_IRQ_IDX -1 >> + * as the Marco of configure interrupt's IDX, If this driver does not > > Copy/paste of pre-existing comment, still I wonder who is "the Marco > of configure" :P > >> + * support, the function will return >> + */ First patch of my last VirtIO series fixes these all up.
diff --git a/hw/virtio/vhost-user-i2c.c b/hw/virtio/vhost-user-i2c.c index 60eaf0d95be0..45100a24953c 100644 --- a/hw/virtio/vhost-user-i2c.c +++ b/hw/virtio/vhost-user-i2c.c @@ -128,6 +128,16 @@ static void vu_i2c_guest_notifier_mask(VirtIODevice *vdev, int idx, bool mask) { VHostUserI2C *i2c = VHOST_USER_I2C(vdev); + /* + * Add the check for configure interrupt, Use VIRTIO_CONFIG_IRQ_IDX -1 + * as the Marco of configure interrupt's IDX, If this driver does not + * support, the function will return + */ + + if (idx == VIRTIO_CONFIG_IRQ_IDX) { + return; + } + vhost_virtqueue_mask(&i2c->vhost_dev, vdev, idx, mask); } @@ -135,6 +145,16 @@ static bool vu_i2c_guest_notifier_pending(VirtIODevice *vdev, int idx) { VHostUserI2C *i2c = VHOST_USER_I2C(vdev); + /* + * Add the check for configure interrupt, Use VIRTIO_CONFIG_IRQ_IDX -1 + * as the Marco of configure interrupt's IDX, If this driver does not + * support, the function will return + */ + + if (idx == VIRTIO_CONFIG_IRQ_IDX) { + return false; + } + return vhost_virtqueue_pending(&i2c->vhost_dev, idx); }
Since the driver doesn't support interrupts, we must return early when index is set to VIRTIO_CONFIG_IRQ_IDX. Fixes: 544f0278afca ("virtio: introduce macro VIRTIO_CONFIG_IRQ_IDX") Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> --- hw/virtio/vhost-user-i2c.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)