linux-kernel - [PATCH v1 1/1] mfd: intel-lpss: Try to enable Memory-Write-Invalidate

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Date:   Thu, 10 Nov 2016 16:51:42 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Lee Jones <lee.jones@...aro.org>, linux-kernel@...r.kernel.org,
        Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v1 1/1] mfd: intel-lpss: Try to enable Memory-Write-Invalidate

Enable MWI mechanism if PCI bus master supports it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/mfd/intel-lpss-pci.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mfd/intel-lpss-pci.c b/drivers/mfd/intel-lpss-pci.c
index 50e78db..4756153 100644
--- a/drivers/mfd/intel-lpss-pci.c
+++ b/drivers/mfd/intel-lpss-pci.c
@@ -41,6 +41,7 @@ static int intel_lpss_pci_probe(struct pci_dev *pdev,
 
 	/* Probably it is enough to set this for iDMA capable devices only */
 	pci_set_master(pdev);
+	pci_try_set_mwi(pdev);
 
 	ret = intel_lpss_probe(&pdev->dev, info);
 	if (ret)
-- 
2.9.3