linux-kernel - [PATCH AUTOSEL 6.6 31/36] PCI: Use FIELD_GET() in Sapphire RX 5600 XT Pulse quirk

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Message-ID: <20231107154654.3765336-31-sashal@kernel.org>
Date:   Tue,  7 Nov 2023 10:46:13 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        Nirmoy Das <nirmoy.das@....com>,
        Sasha Levin <sashal@...nel.org>, linux-pci@...r.kernel.org
Subject: [PATCH AUTOSEL 6.6 31/36] PCI: Use FIELD_GET() in Sapphire RX 5600 XT Pulse quirk

From: Bjorn Helgaas <bhelgaas@...gle.com>

[ Upstream commit 04e82fa5951ca66495d7b05665eff673aa3852b4 ]

Use FIELD_GET() to remove dependences on the field position, i.e., the
shift value.  No functional change intended.

Separate because this isn't as trivial as the other FIELD_GET() changes.

See 907830b0fc9e ("PCI: Add a REBAR size quirk for Sapphire RX 5600 XT
Pulse")

Link: https://lore.kernel.org/r/20231010204436.1000644-3-helgaas@kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>
Cc: Nirmoy Das <nirmoy.das@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/pci/pci.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index ec43ebfc24a5d..a607f277ccf10 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -3755,14 +3755,14 @@ u32 pci_rebar_get_possible_sizes(struct pci_dev *pdev, int bar)
 		return 0;
 
 	pci_read_config_dword(pdev, pos + PCI_REBAR_CAP, &cap);
-	cap &= PCI_REBAR_CAP_SIZES;
+	cap = FIELD_GET(PCI_REBAR_CAP_SIZES, cap);
 
 	/* Sapphire RX 5600 XT Pulse has an invalid cap dword for BAR 0 */
 	if (pdev->vendor == PCI_VENDOR_ID_ATI && pdev->device == 0x731f &&
-	    bar == 0 && cap == 0x7000)
-		cap = 0x3f000;
+	    bar == 0 && cap == 0x700)
+		return 0x3f00;
 
-	return cap >> 4;
+	return cap;
 }
 EXPORT_SYMBOL(pci_rebar_get_possible_sizes);
 
-- 
2.42.0