On Tue, Sep 25, 2012 at 01:04:25PM -0600, Bjorn Helgaas wrote: > On Tue, Sep 25, 2012 at 7:25 AM, Matthew Garrett <m...@redhat.com> wrote:
> Do you know of any scenarios besides this IPMI one where there's the > possibility of two drivers matching the same device? If so, does the > detach/attach process work reasonably? My worry is that drivers don't > normally give up devices, so the detach path is not well exercised. > And I don't know what happens to any users of the device during the > switch. For example, if something was using a TPM and we replaced the > driver, what does that look like to the user? Yeah, this could definitely happen with TPM - tpm_infinion could displace tpm_tis. This actually flags up something kind of obviously broken in the TPM code, since tpm_infineon comes *after* tpm_tis in the link order despite being more specific. Winning. It looks like there's a valid tpm_release function, but I'll find an infineon machine and figure out whether it actually works or not. -- Matthew Garrett | mj...@srcf.ucam.org -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
