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| author | Viresh Kumar <viresh.kumar@linaro.org> | 2021-10-21 12:47:49 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2021-11-01 12:26:48 +0300 |
| commit | dcce162559ee1ce5f64992c4c65197f9270e3d4f (patch) | |
| tree | a6130ea2ab1b5b628b4fd77d276b894a39cf295f /drivers/block | |
| parent | f1aa12f53529ccd67722241792f39248bc89d353 (diff) | |
| download | linux-dcce162559ee1ce5f64992c4c65197f9270e3d4f.tar.xz | |
i2c: virtio: Add support for zero-length requests
The virtio specification received a new mandatory feature
(VIRTIO_I2C_F_ZERO_LENGTH_REQUEST) for zero length requests. Fail if the
feature isn't offered by the device.
For each read-request, set the VIRTIO_I2C_FLAGS_M_RD flag, as required
by the VIRTIO_I2C_F_ZERO_LENGTH_REQUEST feature.
This allows us to support zero length requests, like SMBUS Quick, where
the buffer need not be sent anymore.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://lore.kernel.org/r/7c58868cd26d2fc4bd82d0d8b0dfb55636380110.1634808714.git.viresh.kumar@linaro.org
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jie Deng <jie.deng@intel.com> # once the spec is merged
Diffstat (limited to 'drivers/block')
0 files changed, 0 insertions, 0 deletions