linux-kernel - Re: [PATCH V4 13/23] RISC-V: cpufeature: Add ACPI support in riscv_fill

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Date:   Wed, 5 Apr 2023 17:37:01 +0200
From:   Andrew Jones <ajones@...tanamicro.com>
To:     Conor Dooley <conor@...nel.org>
Cc:     Sunil V L <sunilvl@...tanamicro.com>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-acpi@...r.kernel.org, linux-crypto@...r.kernel.org,
        platform-driver-x86@...r.kernel.org, llvm@...ts.linux.dev,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Tom Rix <trix@...hat.com>, Weili Qian <qianweili@...wei.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Jonathan Corbet <corbet@....net>,
        Marc Zyngier <maz@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Albert Ou <aou@...s.berkeley.edu>,
        Mark Gross <markgross@...nel.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Zhou Wang <wangzhou1@...ilicon.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Len Brown <lenb@...nel.org>,
        Maximilian Luz <luzmaximilian@...il.com>,
        "David S . Miller" <davem@...emloft.net>
Subject: Re: [PATCH V4 13/23] RISC-V: cpufeature: Add ACPI support in
 riscv_fill_hwcap()

On Wed, Apr 05, 2023 at 03:31:24PM +0100, Conor Dooley wrote:
> On Wed, Apr 05, 2023 at 07:05:42PM +0530, Sunil V L wrote:
> > On Tue, Apr 04, 2023 at 09:57:19PM +0100, Conor Dooley wrote:
> > > On Tue, Apr 04, 2023 at 11:50:27PM +0530, Sunil V L wrote:
...
> > > > -		if (of_property_read_string(node, "riscv,isa", &isa)) {
> > > > -			pr_warn("Unable to find \"riscv,isa\" devicetree entry\n");
> > > > -			continue;
> > > > +		if (acpi_disabled) {
> > > > +			node = of_cpu_device_node_get(cpu);
> > > > +			if (node) {
> > > > +				rc = of_property_read_string(node, "riscv,isa", &isa);
> > > 
> > > Hmm, after digging in the previous patch, I think this is actually not
> > > possible to fail? We already validated it when setting up the mask of
> > > possible cpus, but I think leaving the error handling here makes things
> > > a lot more obvious.
> > > 
> > Yeah, do you prefer to merge these patches again since only in this
> > patch, we change the loop to for_each_possible_cpu() from
> > for_each_of_cpu_node() which actually makes riscv_of_processor_hartid()
> > not useful?
> 
> Yah, all 3 of us mistakenly thought that that was an unrelated cleanup
> on the last revision, but clearly it is not.
> Squash it back IMO, sorry for my part in the extra work generated.

Yup, please squash back in. Sorry about that, Sunil!

drew