linux-kernel - RE: [PATCH RESEND v5 01/14] PCI: dwc: Fix erroneous version type test helper

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Message-ID: <TYBPR01MB53411830C969326CDA5E9DF5D8759@TYBPR01MB5341.jpnprd01.prod.outlook.com>
Date:   Fri, 12 May 2023 09:55:42 +0000
From:   Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
To:     Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Cai Huoqing <cai.huoqing@...ux.dev>,
        Jingoo Han <jingoohan1@...il.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Vinod Koul <vkoul@...nel.org>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Rob Herring <robh@...nel.org>,
        Manivannan Sadhasivam <mani@...nel.org>,
        Serge Semin <fancer.lancer@...il.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>
CC:     Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "dmaengine@...r.kernel.org" <dmaengine@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH RESEND v5 01/14] PCI: dwc: Fix erroneous version type test
 helper

Hi Serge,

> From: Serge Semin, Sent: Friday, May 12, 2023 4:09 AM
> 
> Due to an unfortunate mistake the macro function actually checks the
> IP-core version instead of the IP-core version type which isn't what
> originally implied. Fix it by introducing a new helper
> __dw_pcie_ver_type_cmp() with the same semantic as the __dw_pcie_ver_cmp()
> counterpart except it refers to the dw_pcie.type field in order to perform
> the passed comparison operation.
> 
> Fixes: 0b0a780d52ad ("PCI: dwc: Add macros to compare Synopsys IP core versions")
> Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

I'm not sure whether my review is useful or not, but anyway,

Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>

Best regards,
Yoshihiro Shimoda

> ---
>  drivers/pci/controller/dwc/pcie-designware.h | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
> index 79713ce075cc..adad0ea61799 100644
> --- a/drivers/pci/controller/dwc/pcie-designware.h
> +++ b/drivers/pci/controller/dwc/pcie-designware.h
> @@ -37,17 +37,20 @@
>  #define __dw_pcie_ver_cmp(_pci, _ver, _op) \
>  	((_pci)->version _op DW_PCIE_VER_ ## _ver)
> 
> +#define __dw_pcie_ver_type_cmp(_pci, _type, _op) \
> +	((_pci)->type _op DW_PCIE_VER_TYPE_ ## _type)
> +
>  #define dw_pcie_ver_is(_pci, _ver) __dw_pcie_ver_cmp(_pci, _ver, ==)
> 
>  #define dw_pcie_ver_is_ge(_pci, _ver) __dw_pcie_ver_cmp(_pci, _ver, >=)
> 
>  #define dw_pcie_ver_type_is(_pci, _ver, _type) \
>  	(__dw_pcie_ver_cmp(_pci, _ver, ==) && \
> -	 __dw_pcie_ver_cmp(_pci, TYPE_ ## _type, ==))
> +	 __dw_pcie_ver_type_cmp(_pci, _type, ==))
> 
>  #define dw_pcie_ver_type_is_ge(_pci, _ver, _type) \
>  	(__dw_pcie_ver_cmp(_pci, _ver, ==) && \
> -	 __dw_pcie_ver_cmp(_pci, TYPE_ ## _type, >=))
> +	 __dw_pcie_ver_type_cmp(_pci, _type, >=))
> 
>  /* DWC PCIe controller capabilities */
>  #define DW_PCIE_CAP_REQ_RES		0
> --
> 2.40.0
>