linux-kernel - RE: [PATCH 4/5] scsi: ufs: tc-dwc-pci: Allow for MSI interrupt type

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Date:   Fri, 24 Apr 2020 11:55:57 +0000
From:   "Winkler, Tomas" <tomas.winkler@...el.com>
To:     Jose Abreu <Jose.Abreu@...opsys.com>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>
CC:     Joao Pinto <Joao.Pinto@...opsys.com>,
        Joao Lima <Joao.Lima@...opsys.com>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 4/5] scsi: ufs: tc-dwc-pci: Allow for MSI interrupt type

> 
> Newer Test Chips boards have MSI support. It does no harm to try to request it
> as the function will fallback to legacy interrupts if MSI is not supported.
> 
> Signed-off-by: Jose Abreu <Jose.Abreu@...opsys.com>
> 
> ---
> Cc: Joao Lima <Joao.Lima@...opsys.com>
> Cc: Jose Abreu <Jose.Abreu@...opsys.com>
> Cc: Alim Akhtar <alim.akhtar@...sung.com>
> Cc: Avri Altman <avri.altman@....com>
> Cc: "James E.J. Bottomley" <jejb@...ux.ibm.com>
> Cc: "Martin K. Petersen" <martin.petersen@...cle.com>
> Cc: linux-scsi@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> ---
>  drivers/scsi/ufs/tc-dwc-pci.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/scsi/ufs/tc-dwc-pci.c b/drivers/scsi/ufs/tc-dwc-pci.c index
> 74a2d80d32bd..e0a880cbbe68 100644
> --- a/drivers/scsi/ufs/tc-dwc-pci.c
> +++ b/drivers/scsi/ufs/tc-dwc-pci.c
> @@ -136,9 +136,15 @@ tc_dwc_pci_probe(struct pci_dev *pdev, const struct
> pci_device_id *id)
>  		return -ENOENT;
>  	}
> 
> +	err = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES);
PCI_IRQ_LEGACY | PCI_IRQ_MSI , is enough  you don't have MSIX
> +	if (err < 0) {
> +		dev_err(&pdev->dev, "Allocation failed\n");
> +		return err;
> +	}
> +
Where do you call pci_free_irq_vectors() ? 
>  	hba->vops = &data->ops;
> 
> -	err = ufshcd_init(hba, mmio_base, pdev->irq);
> +	err = ufshcd_init(hba, mmio_base, pci_irq_vector(pdev, 0));
>  	if (err) {
>  		dev_err(&pdev->dev, "Initialization failed\n");
>  		return err;
> --
> 2.7.4