Re: [Part2 PATCH v5.2 12.2/31] crypto: ccp: Add Secure Encrypted Virtualization (SEV) command support

[Borislav Petkov]

On Thu, Oct 12, 2017 at 04:11:18PM -0500, Brijesh Singh wrote:
> The sev_exit() will be called for all the psp_device instance. we need
> to set psp_misc_dev = NULL after deregistering the device.
> 
> if (psp_misc_dev) {
> Â misc_deregister(psp_misc_dev);
> ÂÂ psp_misc_dev = NULL;

Right, except we assign that misc device to every psp device:

	psp->sev_misc = psp_misc_dev;

so the question now is, how do you want this to work: the misc device
should be destroyed after the last psp device is destroyed or how?

Because after the first:

	psp_misc_dev = NULL;

the respective psp->sev_misc will still keep references to that device
but the device itself will be already deregistered. And that sounds
strange.

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Regards/Gruss,
    Boris.

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