linux-kernel - RE: [PATCH v1 02/16] ufs: core: Introduce Multi-circular queue capability

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Date:   Sat, 24 Sep 2022 08:13:38 +0000
From:   Avri Altman <Avri.Altman@....com>
To:     Asutosh Das <quic_asutoshd@...cinc.com>,
        "mani@...nel.org" <mani@...nel.org>,
        "quic_nguyenb@...cinc.com" <quic_nguyenb@...cinc.com>,
        "quic_xiaosenh@...cinc.com" <quic_xiaosenh@...cinc.com>,
        "quic_cang@...cinc.com" <quic_cang@...cinc.com>,
        "quic_nitirawa@...cinc.com" <quic_nitirawa@...cinc.com>,
        "quic_rampraka@...cinc.com" <quic_rampraka@...cinc.com>,
        "quic_richardp@...cinc.com" <quic_richardp@...cinc.com>,
        "stanley.chu@...iatek.com" <stanley.chu@...iatek.com>,
        "adrian.hunter@...el.com" <adrian.hunter@...el.com>,
        "bvanassche@....org" <bvanassche@....org>,
        "beanhuo@...ron.com" <beanhuo@...ron.com>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>
CC:     "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        open list <linux-kernel@...r.kernel.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>
Subject: RE: [PATCH v1 02/16] ufs: core: Introduce Multi-circular queue
 capability

> 
>  #define EXT_IID_CAP_SHIFT 10
> +#define MCQ_SUPP_SHIFT 30
>  #define ufshcd_toggle_vreg(_dev, _vreg, _on)                           \
>         ({                                                              \
>                 int _ret;                                               \
> @@ -2240,6 +2241,10 @@ static inline int ufshcd_hba_capabilities(struct
> ufs_hba *hba)
>         if (err)
>                 dev_err(hba->dev, "crypto setup failed\n");
> 
> +       hba->mcq_sup = (hba->capabilities & MASK_MCQ_SUPPORT) >>
> MCQ_SUPP_SHIFT;
Since you are just testing for bit30, MASK_MCQ_SUPPORT is not really needed.
Maybe just:
hba->mcq_sup = (hba->capabilities >> MCQ_SUPP_SHIFT) & 1;

Thanks,
Avri