linux-kernel - [PATCH 7/8] net: thunder_bgx: Use pure PCI devres API

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Message-ID: <20250416164407.127261-9-phasta@kernel.org>
Date: Wed, 16 Apr 2025 18:44:07 +0200
From: Philipp Stanner <phasta@...nel.org>
To: Sunil Goutham <sgoutham@...vell.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Geetha sowjanya <gakula@...vell.com>,
	Subbaraya Sundeep <sbhatta@...vell.com>,
	hariprasad <hkelam@...vell.com>,
	Bharat Bhushan <bbhushan2@...vell.com>,
	Taras Chornyi <taras.chornyi@...ision.eu>,
	Daniele Venzano <venza@...wnhat.org>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	Thomas Gleixner <tglx@...utronix.de>,
	Philipp Stanner <phasta@...nel.org>,
	Helge Deller <deller@....de>,
	Ingo Molnar <mingo@...nel.org>,
	Simon Horman <horms@...nel.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	Sabrina Dubroca <sd@...asysnail.net>,
	Jacob Keller <jacob.e.keller@...el.com>
Cc: linux-arm-kernel@...ts.infradead.org,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-parisc@...r.kernel.org
Subject: [PATCH 7/8] net: thunder_bgx: Use pure PCI devres API

The currently used function pci_request_regions() is one of the
problematic "hybrid devres" PCI functions, which are sometimes managed
through devres, and sometimes not (depending on whether
pci_enable_device() or pcim_enable_device() has been called before).

The PCI subsystem wants to remove this behavior and, therefore, needs to
port all users to functions that don't have this problem.

Furthermore, the PCI function being managed implies that it's not
necessary to call pci_release_regions() manually.

Remove the calls to pci_release_regions().

Replace pci_request_regions() with pcim_request_all_regions().

Signed-off-by: Philipp Stanner <phasta@...nel.org>
---
 drivers/net/ethernet/cavium/thunder/thunder_bgx.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
index 608cc6af5af1..c9369bdd04e0 100644
--- a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
+++ b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
@@ -1605,7 +1605,7 @@ static int bgx_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		return dev_err_probe(dev, err, "Failed to enable PCI device\n");
 	}
 
-	err = pci_request_regions(pdev, DRV_NAME);
+	err = pcim_request_all_regions(pdev, DRV_NAME);
 	if (err) {
 		dev_err(dev, "PCI request regions failed 0x%x\n", err);
 		goto err_disable_device;
@@ -1616,7 +1616,7 @@ static int bgx_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (!bgx->reg_base) {
 		dev_err(dev, "BGX: Cannot map CSR memory space, aborting\n");
 		err = -ENOMEM;
-		goto err_release_regions;
+		goto err_disable_device;
 	}
 
 	set_max_bgx_per_node(pdev);
@@ -1688,8 +1688,6 @@ static int bgx_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 err_enable:
 	bgx_vnic[bgx->bgx_id] = NULL;
 	pci_free_irq(pdev, GMPX_GMI_TX_INT, bgx);
-err_release_regions:
-	pci_release_regions(pdev);
 err_disable_device:
 	pci_disable_device(pdev);
 	pci_set_drvdata(pdev, NULL);
@@ -1710,7 +1708,6 @@ static void bgx_remove(struct pci_dev *pdev)
 	pci_free_irq(pdev, GMPX_GMI_TX_INT, bgx);
 
 	bgx_vnic[bgx->bgx_id] = NULL;
-	pci_release_regions(pdev);
 	pci_disable_device(pdev);
 	pci_set_drvdata(pdev, NULL);
 }
-- 
2.48.1