linux-kernel - [PATCH 1/2] misc: cardreader: Use non-hybrid PCI devres API

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250417091532.26520-2-phasta@kernel.org>
Date: Thu, 17 Apr 2025 11:15:32 +0200
From: Philipp Stanner <phasta@...nel.org>
To: Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Philipp Stanner <phasta@...nel.org>,
	Desnes Nunes <desnesn@...hat.com>
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] misc: cardreader: Use non-hybrid PCI devres API

cardreader enables its PCI device with pcim_enable_device(). This,
implicitly, switches the function pci_request_regions() into managed
mode, where it becomes a devres function.

The PCI subsystem wants to remove this hybrid nature from its
interfaces. To do so, users of the aforementioned combination of
functions must be ported to non-hybrid functions.

Moreover, since both functions are already managed in this driver, the
calls to pci_release_regions() are unnecessary.

Remove the calls to pci_release_regions().

Replace the call to sometimes-managed pci_request_regions() with one to
the always-managed pcim_request_all_regions().

Signed-off-by: Philipp Stanner <phasta@...nel.org>
---
 drivers/misc/cardreader/alcor_pci.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/misc/cardreader/alcor_pci.c b/drivers/misc/cardreader/alcor_pci.c
index a5549eaf52d0..43f08b0db742 100644
--- a/drivers/misc/cardreader/alcor_pci.c
+++ b/drivers/misc/cardreader/alcor_pci.c
@@ -121,7 +121,7 @@ static int alcor_pci_probe(struct pci_dev *pdev,
 	priv->cfg = cfg;
 	priv->irq = pdev->irq;
 
-	ret = pci_request_regions(pdev, DRV_NAME_ALCOR_PCI);
+	ret = pcim_request_all_regions(pdev, DRV_NAME_ALCOR_PCI);
 	if (ret) {
 		dev_err(&pdev->dev, "Cannot request region\n");
 		ret = -ENOMEM;
@@ -131,13 +131,13 @@ static int alcor_pci_probe(struct pci_dev *pdev,
 	if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM)) {
 		dev_err(&pdev->dev, "BAR %d is not iomem. Aborting.\n", bar);
 		ret = -ENODEV;
-		goto error_release_regions;
+		goto error_free_ida;
 	}
 
 	priv->iobase = pcim_iomap(pdev, bar, 0);
 	if (!priv->iobase) {
 		ret = -ENOMEM;
-		goto error_release_regions;
+		goto error_free_ida;
 	}
 
 	/* make sure irqs are disabled */
@@ -147,7 +147,7 @@ static int alcor_pci_probe(struct pci_dev *pdev,
 	ret = dma_set_mask_and_coherent(priv->dev, AU6601_SDMA_MASK);
 	if (ret) {
 		dev_err(priv->dev, "Failed to set DMA mask\n");
-		goto error_release_regions;
+		goto error_free_ida;
 	}
 
 	pci_set_master(pdev);
@@ -169,8 +169,6 @@ static int alcor_pci_probe(struct pci_dev *pdev,
 error_clear_drvdata:
 	pci_clear_master(pdev);
 	pci_set_drvdata(pdev, NULL);
-error_release_regions:
-	pci_release_regions(pdev);
 error_free_ida:
 	ida_free(&alcor_pci_idr, priv->id);
 	return ret;
@@ -186,7 +184,6 @@ static void alcor_pci_remove(struct pci_dev *pdev)
 
 	ida_free(&alcor_pci_idr, priv->id);
 
-	pci_release_regions(pdev);
 	pci_clear_master(pdev);
 	pci_set_drvdata(pdev, NULL);
 }
-- 
2.48.1