linux-kernel - Re: [PATCH] PCI: dwc: designware: test PCIE_ATU

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Message-ID: <000b01d2ff33$76d4fad0$647ef070$@gmail.com>
Date:   Mon, 17 Jul 2017 15:32:43 -0400
From:   "Jingoo Han" <jingoohan1@...il.com>
To:     "'Joao Pinto'" <Joao.Pinto@...opsys.com>,
        "'Jisheng Zhang'" <jszhang@...vell.com>, <bhelgaas@...gle.com>
Cc:     <linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] PCI: dwc: designware: test PCIE_ATU_ENABLE bit to check enabled or not

On Monday, July 17, 2017 5:28 AM, Joao Pinto wrote:
> 
> Hi,
> 
> Às 11:35 AM de 7/13/2017, Jisheng Zhang escreveu:
> > The ATU CTRL2 register is 32 bit, besides the enable bit, other bits
> > may also be set. To check whether the ATU is enabled or not, we should
> > test the enable it.

To Jisheng Zhang,

typo s/it/bit

"test the enable it."  ---> "test the enable bit."


Please fix this typo, and send it again.
Type is confusing.


Best regards,
Jingoo Han


> >
> > Signed-off-by: Jisheng Zhang <jszhang@...vell.com>
> > ---
> >  drivers/pci/dwc/pcie-designware.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/pci/dwc/pcie-designware.c b/drivers/pci/dwc/pcie-
> designware.c
> > index 0e03af279259..6bf0b409050a 100644
> > --- a/drivers/pci/dwc/pcie-designware.c
> > +++ b/drivers/pci/dwc/pcie-designware.c
> > @@ -177,7 +177,7 @@ void dw_pcie_prog_outbound_atu(struct dw_pcie *pci,
> int index, int type,
> >  	 */
> >  	for (retries = 0; retries < LINK_WAIT_MAX_IATU_RETRIES; retries++)
> {
> >  		val = dw_pcie_readl_dbi(pci, PCIE_ATU_CR2);
> > -		if (val == PCIE_ATU_ENABLE)
> > +		if (val & PCIE_ATU_ENABLE)
> >  			return;
> >
> >  		usleep_range(LINK_WAIT_IATU_MIN, LINK_WAIT_IATU_MAX);
> >
> Make sense, turn it more accurate. Thanks!
> 
> Acked-by: Joao Pinto <jpinto@...opsys.com>