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SubjectRe: [PATCH v10] i2c: virtio: add a virtio i2c frontend driver

>     3. It seems the I2C core takes care of locking already, so is it safy to
> remove "struct mutex lock in struct virtio_i2c"?

Looks to me like the mutex is only to serialize calls to
virtio_i2c_xfer(). Then, it can go. The core does locking. See, we have
i2c_transfer and __i2c_transfer, the unlocked version.

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