linux-kernel - Re: [External] Re: [PATCH RESEND] riscv: Fix local irq restore when flags indicates irq disabled

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Message-ID: <CAPYmKFsbGMRY7S6WguDHkkY1futTS7+piKf83Pb+aktO2yLXpw@mail.gmail.com>
Date:   Thu, 3 Aug 2023 23:20:53 +0800
From:   旭路 <luxu.kernel@...edance.com>
To:     Conor Dooley <conor@...nel.org>
Cc:     paul.walmsley@...ive.com, palmer@...belt.com,
        aou@...s.berkeley.edu, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [External] Re: [PATCH RESEND] riscv: Fix local irq restore when
 flags indicates irq disabled

On Thu, Aug 3, 2023 at 10:36 PM Conor Dooley <conor@...nel.org> wrote:
>
> Hey,
>
> On Thu, Aug 03, 2023 at 09:28:18PM +0800, Xu Lu wrote:
> > When arch_local_irq_restore() is called with flags indicating irqs
> > disabled, we need to clear SR_IE bit in CSR_STATUS, whereas current
> > implementation based on csr_set() function only sets SR_IE bit of
> > CSR_STATUS when SR_IE bit of flags is high and does nothing when
> > SR_IE bit of flags is low.
> >
> > This commit supplies csr clear operation when calling irq restore
> > function with flags indicating irq disabled.
> >
> > Fixes: 6d60b6ee0c97 ("RISC-V: Device, timer, IRQs, and the SBI")
> > Signed-off-by: Xu Lu <luxu.kernel@...edance.com>
> > ---
>
> There's no changelog or explanation, so what is the reason for the
> resend?
>
> Cheers,
> Conor.

Sorry for disturbing you.

I haven't received any response since the patch was sent last week. I
think maintainers are busy and thus I want to have a ping. This patch
was resent because I found it is said that resending patch is one of
the methods to ping maintainers in this kernel doc:
https://www.kernel.org/doc/html/latest/process/submitting-patches.html.

> >  arch/riscv/include/asm/irqflags.h | 5 ++++-
> >  1 file changed, 4 insertions(+), 1 deletion(-)
> >
> > diff --git a/arch/riscv/include/asm/irqflags.h b/arch/riscv/include/asm/irqflags.h
> > index 08d4d6a5b7e9..7c31fc3c3559 100644
> > --- a/arch/riscv/include/asm/irqflags.h
> > +++ b/arch/riscv/include/asm/irqflags.h
> > @@ -49,7 +49,10 @@ static inline int arch_irqs_disabled(void)
> >  /* set interrupt enabled status */
> >  static inline void arch_local_irq_restore(unsigned long flags)
> >  {
> > -     csr_set(CSR_STATUS, flags & SR_IE);
> > +     if (flags & SR_IE)
> > +             csr_set(CSR_STATUS, SR_IE);
> > +     else
> > +             csr_clear(CSR_STATUS, SR_IE);
> >  }
> >
> >  #endif /* _ASM_RISCV_IRQFLAGS_H */
> > --
> > 2.20.1
> >
> >
> > _______________________________________________
> > linux-riscv mailing list
> > linux-riscv@...ts.infradead.org
> > http://lists.infradead.org/mailman/listinfo/linux-riscv

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