linux-kernel - [PATCH v2 4/5] scsi: ufs: tc-dwc-pci: Allow for MSI interrupt type

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Message-Id: <05ba98b7a98520e3ac3884037ee481da460d0dcc.1587735561.git.Jose.Abreu@synopsys.com>
Date:   Fri, 24 Apr 2020 15:44:48 +0200
From:   Jose Abreu <Jose.Abreu@...opsys.com>
To:     linux-scsi@...r.kernel.org
Cc:     Joao Pinto <Joao.Pinto@...opsys.com>,
        Jose Abreu <Jose.Abreu@...opsys.com>,
        "Winkler, Tomas" <tomas.winkler@...el.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
Subject: [PATCH v2 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>

---

Changes from v1:
- Do not try to request MSIX vectors (Tomas)
- Add missing call to pci_free_irq_vectors() (Tomas)

Cc: "Winkler, Tomas" <tomas.winkler@...el.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 | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/ufs/tc-dwc-pci.c b/drivers/scsi/ufs/tc-dwc-pci.c
index 74a2d80d32bd..78dc6c484e84 100644
--- a/drivers/scsi/ufs/tc-dwc-pci.c
+++ b/drivers/scsi/ufs/tc-dwc-pci.c
@@ -88,6 +88,7 @@ static void tc_dwc_pci_remove(struct pci_dev *pdev)
 	pm_runtime_forbid(&pdev->dev);
 	pm_runtime_get_noresume(&pdev->dev);
 	ufshcd_remove(hba);
+	pci_free_irq_vectors(pdev);
 }
 
 /**
@@ -136,11 +137,18 @@ 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_LEGACY | PCI_IRQ_MSI);
+	if (err < 0) {
+		dev_err(&pdev->dev, "Allocation failed\n");
+		return err;
+	}
+
 	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");
+		pci_free_irq_vectors(pdev);
 		return err;
 	}
 
-- 
2.7.4