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 for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20241009083519.10088-9-pstanner@redhat.com>
Date: Wed,  9 Oct 2024 10:35:14 +0200
From: Philipp Stanner <pstanner@...hat.com>
To: Damien Le Moal <dlemoal@...nel.org>,
	Niklas Cassel <cassel@...nel.org>,
	Sergey Shtylyov <s.shtylyov@....ru>,
	Basavaraj Natikar <basavaraj.natikar@....com>,
	Jiri Kosina <jikos@...nel.org>,
	Benjamin Tissoires <bentiss@...nel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Alex Dubov <oakad@...oo.com>,
	Sudarsana Kalluru <skalluru@...vell.com>,
	Manish Chopra <manishc@...vell.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Rasesh Mody <rmody@...vell.com>,
	GR-Linux-NIC-Dev@...vell.com,
	Igor Mitsyanko <imitsyanko@...ntenna.com>,
	Sergey Matyukevich <geomatsi@...il.com>,
	Kalle Valo <kvalo@...nel.org>,
	Sanjay R Mehta <sanju.mehta@....com>,
	Shyam Sundar S K <Shyam-sundar.S-k@....com>,
	Jon Mason <jdmason@...zu.us>,
	Dave Jiang <dave.jiang@...el.com>,
	Allen Hubbe <allenbh@...il.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Alex Williamson <alex.williamson@...hat.com>,
	Juergen Gross <jgross@...e.com>,
	Stefano Stabellini <sstabellini@...nel.org>,
	Oleksandr Tyshchenko <oleksandr_tyshchenko@...m.com>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>,
	Philipp Stanner <pstanner@...hat.com>,
	Mario Limonciello <mario.limonciello@....com>,
	Chen Ni <nichen@...as.ac.cn>,
	Ricky Wu <ricky_wu@...ltek.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	Breno Leitao <leitao@...ian.org>,
	Kevin Tian <kevin.tian@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
	Mostafa Saleh <smostafa@...gle.com>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Hannes Reinecke <hare@...e.de>,
	John Garry <john.g.garry@...cle.com>,
	Soumya Negi <soumya.negi97@...il.com>,
	Jason Gunthorpe <jgg@...pe.ca>,
	Yi Liu <yi.l.liu@...el.com>,
	"Dr. David Alan Gilbert" <linux@...blig.org>,
	Christian Brauner <brauner@...nel.org>,
	Ankit Agrawal <ankita@...dia.com>,
	Reinette Chatre <reinette.chatre@...el.com>,
	Eric Auger <eric.auger@...hat.com>,
	Ye Bin <yebin10@...wei.com>,
	Marek Marczykowski-Górecki <marmarek@...isiblethingslab.com>,
	Pierre-Louis Bossart <pierre-louis.bossart@...ux.dev>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
	Peter Ujfalusi <peter.ujfalusi@...ux.intel.com>,
	Rui Salvaterra <rsalvaterra@...il.com>,
	Marc Zyngier <maz@...nel.org>
Cc: linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-input@...r.kernel.org,
	netdev@...r.kernel.org,
	linux-wireless@...r.kernel.org,
	ntb@...ts.linux.dev,
	linux-pci@...r.kernel.org,
	linux-staging@...ts.linux.dev,
	kvm@...r.kernel.org,
	xen-devel@...ts.xenproject.org,
	linux-sound@...r.kernel.org
Subject: [RFC PATCH 08/13] PCI: MSI: Use never-managed version of pci_intx()

pci_intx() is a hybrid function which can sometimes be managed through
devres. To remove this hybrid nature from pci_intx(), it is necessary to
port users to either an always-managed or a never-managed version.

MSI sets up its own separate devres callback implicitly in
pcim_setup_msi_release(). This callback ultimately uses pci_intx(),
which is problematic since the callback of course runs on driver-detach.

That problem has last been described here:
https://lore.kernel.org/all/ee44ea7ac760e73edad3f20b30b4d2fff66c1a85.camel@redhat.com/

Replace the call to pci_intx() with one to the never-managed version
pci_intx_unmanaged().

Signed-off-by: Philipp Stanner <pstanner@...hat.com>
---
This MSI part here is probably the part of the series that needs most
attention.
---
 drivers/pci/msi/api.c | 2 +-
 drivers/pci/msi/msi.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/msi/api.c b/drivers/pci/msi/api.c
index b956ce591f96..c95e2e7dc9ab 100644
--- a/drivers/pci/msi/api.c
+++ b/drivers/pci/msi/api.c
@@ -289,7 +289,7 @@ int pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
 			 */
 			if (affd)
 				irq_create_affinity_masks(1, affd);
-			pci_intx(dev, 1);
+			pci_intx_unmanaged(dev, 1);
 			return 1;
 		}
 	}
diff --git a/drivers/pci/msi/msi.c b/drivers/pci/msi/msi.c
index 3a45879d85db..53f13b09db50 100644
--- a/drivers/pci/msi/msi.c
+++ b/drivers/pci/msi/msi.c
@@ -268,7 +268,7 @@ EXPORT_SYMBOL_GPL(pci_write_msi_msg);
 static void pci_intx_for_msi(struct pci_dev *dev, int enable)
 {
 	if (!(dev->dev_flags & PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG))
-		pci_intx(dev, enable);
+		pci_intx_unmanaged(dev, enable);
 }
 
 static void pci_msi_set_enable(struct pci_dev *dev, int enable)
-- 
2.46.1


Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ