linux-kernel - RE: [PATCH 2/2] EDAC: synopsys: re-enable the interrupts in intr

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Date:   Wed, 20 Apr 2022 06:23:59 +0000
From:   Sherry Sun <sherry.sun@....com>
To:     Michal Simek <michal.simek@...inx.com>,
        "bp@...en8.de" <bp@...en8.de>,
        "mchehab@...nel.org" <mchehab@...nel.org>,
        "tony.luck@...el.com" <tony.luck@...el.com>,
        "james.morse@....com" <james.morse@....com>,
        "rric@...nel.org" <rric@...nel.org>
CC:     "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        dl-linux-imx <linux-imx@....com>
Subject: RE: [PATCH 2/2] EDAC: synopsys: re-enable the interrupts in
 intr_handler for V3.X Synopsys EDAC DDR


> > Since zynqmp_get_error_info() is called during CE/UE interrupt, at the
> > end of zynqmp_get_error_info(), it wirtes 0 to ECC_CLR_OFST, which cause
> > the CE/UE interrupts of V3.X Synopsys EDAC DDR been disabled, then the
> > interrupt handler will be called only once, so need to re-enable the
> > interrupts at the end of intr_handler for V3.X Synopsys EDAC DDR.
> >
> > Signed-off-by: Sherry Sun <sherry.sun@....com>
> > ---
> >   drivers/edac/synopsys_edac.c | 4 ++++
> >   1 file changed, 4 insertions(+)
> >
> > diff --git a/drivers/edac/synopsys_edac.c b/drivers/edac/synopsys_edac.c
> > index 1b630f0be119..3a1db34a8546 100644
> > --- a/drivers/edac/synopsys_edac.c
> > +++ b/drivers/edac/synopsys_edac.c
> > @@ -521,6 +521,8 @@ static void handle_error(struct mem_ctl_info *mci,
> struct synps_ecc_status *p)
> >   	memset(p, 0, sizeof(*p));
> >   }
> >
> > +static void enable_intr(struct synps_edac_priv *priv);
> > +
> >   /**
> >    * intr_handler - Interrupt Handler for ECC interrupts.
> >    * @irq:        IRQ number.
> > @@ -562,6 +564,8 @@ static irqreturn_t intr_handler(int irq, void *dev_id)
> >   	/* v3.0 of the controller does not have this register */
> >   	if (!(priv->p_data->quirks & DDR_ECC_INTR_SELF_CLEAR))
> >   		writel(regval, priv->baseaddr + DDR_QOS_IRQ_STAT_OFST);
> > +	else
> > +		enable_intr(priv);
> 
> nit: newline here would be good.

Hi Michal, thanks for your comments, I will add the newline here in V2.

Best regards
Sherry
> 
> >   	return IRQ_HANDLED;
> >   }
> >
> 
> Acked-by: Michal Simek <michal.simek@...inx.com>
> 
> Thanks,
> Michal