linux-kernel - Re: [PATCH] virtio-blk: fix probe without CONFIG_BLK_DEV

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Date:   Tue, 20 Dec 2022 14:50:50 -0500
From:   Stefan Hajnoczi <stefanha@...hat.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>
Cc:     linux-kernel@...r.kernel.org,
        Anders Roxell <anders.roxell@...aro.org>,
        Jason Wang <jasowang@...hat.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Jens Axboe <axboe@...nel.dk>,
        virtualization@...ts.linux-foundation.org,
        linux-block@...r.kernel.org
Subject: Re: [PATCH] virtio-blk: fix probe without CONFIG_BLK_DEV_ZONED

On Tue, Dec 20, 2022 at 06:23:44AM -0500, Michael S. Tsirkin wrote:
> When building without CONFIG_BLK_DEV_ZONED, VIRTIO_BLK_F_ZONED
> is excluded from array of driver features.
> As a result virtio_has_feature panics in virtio_check_driver_offered_feature
> since that by design verifies that a feature we are checking for
> is listed in the feature array.
> 
> To fix, replace the call to virtio_has_feature with a stub.
> 
> Tested-by: Anders Roxell <anders.roxell@...aro.org>
> Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
> ---
>  drivers/block/virtio_blk.c | 11 ++++++++++-
>  1 file changed, 10 insertions(+), 1 deletion(-)

Reviewed-by: Stefan Hajnoczi <stefanha@...hat.com>

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