Messages in this thread | | | From | <> | Subject | RE: [PATCH v9 11/17] platform/x86: dell-smbios-smm: test for WSMT | Date | Wed, 18 Oct 2017 19:10:59 +0000 |
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> -----Original Message----- > From: Darren Hart [mailto:dvhart@infradead.org] > Sent: Wednesday, October 18, 2017 2:09 PM > To: Pali Rohár <pali.rohar@gmail.com> > Cc: Limonciello, Mario <Mario_Limonciello@Dell.com>; Andy Shevchenko > <andy.shevchenko@gmail.com>; LKML <linux-kernel@vger.kernel.org>; platform- > driver-x86@vger.kernel.org; Andy Lutomirski <luto@kernel.org>; > quasisec@google.com; rjw@rjwysocki.net; mjg59@google.com; hch@lst.de; Greg > KH <greg@kroah.com>; Alan Cox <gnomes@lxorguk.ukuu.org.uk> > Subject: Re: [PATCH v9 11/17] platform/x86: dell-smbios-smm: test for WSMT > > On Tue, Oct 17, 2017 at 09:22:58PM +0200, Pali Rohár wrote: > > On Tuesday 17 October 2017 13:21:55 Mario Limonciello wrote: > > > +/* When enabled this indicates that SMM won't work */ > > > +static int test_wsmt_enabled(void) > > > +{ > > > + struct calling_interface_token *token; > > > + > > > + /* if token doesn't exist, SMM will work */ > > > + token = dell_smbios_find_token(WSMT_EN_TOKEN); > > > + if (!token) > > > + return 0; > > > + > > > + /* if token exists, try to access over SMM */ > > > + buffer->class = CLASS_TOKEN_READ; > > > + buffer->select = SELECT_TOKEN_STD; > > > + memset(buffer, 0, sizeof(struct calling_interface_buffer)); > > > + buffer->input[0] = token->location; > > > + dell_smbios_smm_call(buffer); > > > + > > > + /* if lookup failed, we know WSMT was enabled */ > > > + if (buffer->output[0] != 0) > > > + return 1; > > > + > > > + /* query token status if it didn't fail */ > > > + return (buffer->output[1] == token->value); > > > +} > > > > Maybe small suggestion... function returns only zero or one -- what is a > > good candidate to have return value boolean and not basic int. > > Yes please. >
OK I'll adjust this (and the other things Pali sent recently) in the next submission.
Just waiting on feedback for some of the other areas before sending off again.
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