linux-kernel - [PATCH AUTOSEL 5.15 17/22] PCI: Extract ATS disabling to a helper function

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Message-ID: <20231107155146.3767610-17-sashal@kernel.org>
Date:   Tue,  7 Nov 2023 10:51:26 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Bartosz Pawlowski <bartosz.pawlowski@...el.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Sasha Levin <sashal@...nel.org>, linux-pci@...r.kernel.org
Subject: [PATCH AUTOSEL 5.15 17/22] PCI: Extract ATS disabling to a helper function

From: Bartosz Pawlowski <bartosz.pawlowski@...el.com>

[ Upstream commit f18b1137d38c091cc8c16365219f0a1d4a30b3d1 ]

Introduce quirk_no_ats() helper function to provide a standard way to
disable ATS capability in PCI quirks.

Suggested-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Link: https://lore.kernel.org/r/20230908143606.685930-2-bartosz.pawlowski@intel.com
Signed-off-by: Bartosz Pawlowski <bartosz.pawlowski@...el.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/pci/quirks.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index ec17d42c2a155..60724825e2524 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -5377,6 +5377,12 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0420, quirk_no_ext_tags);
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0422, quirk_no_ext_tags);
 
 #ifdef CONFIG_PCI_ATS
+static void quirk_no_ats(struct pci_dev *pdev)
+{
+	pci_info(pdev, "disabling ATS\n");
+	pdev->ats_cap = 0;
+}
+
 /*
  * Some devices require additional driver setup to enable ATS.  Don't use
  * ATS for those devices as ATS will be enabled before the driver has had a
@@ -5390,14 +5396,10 @@ static void quirk_amd_harvest_no_ats(struct pci_dev *pdev)
 		    (pdev->subsystem_device == 0xce19 ||
 		     pdev->subsystem_device == 0xcc10 ||
 		     pdev->subsystem_device == 0xcc08))
-			goto no_ats;
-		else
-			return;
+			quirk_no_ats(pdev);
+	} else {
+		quirk_no_ats(pdev);
 	}
-
-no_ats:
-	pci_info(pdev, "disabling ATS\n");
-	pdev->ats_cap = 0;
 }
 
 /* AMD Stoney platform GPU */
-- 
2.42.0