linux-kernel - [PATCH] PCI: Disable bus reset for ASM1164 SATA controller

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: <20260109000211.398300-1-alex.williamson@nvidia.com>
Date: Thu, 8 Jan 2026 17:02:08 -0700
From: Alex Williamson <alex.williamson@...dia.com>
To: <bhelgaas@...gle.com>
CC: Alex Williamson <alex.williamson@...dia.com>, <linux-pci@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <alex@...zbot.org>, Patrick Bianchi
	<patrick.w.bianchi@...il.com>
Subject: [PATCH] PCI: Disable bus reset for ASM1164 SATA controller

User forums report issues when assigning ASM1164 SATA controllers to
VMs, especially in configurations with multiple controllers.  Logs
show the device fails to retrain after bus reset.  Reports suggest
this is an issue across multiple platforms.  The device indicates
support for PM reset, therefore the device still has a viable function
level reset mechanism.  The reporting user confirms the device is well
behaved in this use case with bus reset disabled.

Reported-by: Patrick Bianchi <patrick.w.bianchi@...il.com>
Link: https://forum.proxmox.com/threads/problems-with-pcie-passthrough-with-two-identical-devices.149003/
Signed-off-by: Alex Williamson <alex.williamson@...dia.com>
---
 drivers/pci/quirks.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index b9c252aa6fe0..3a8d5622ee2b 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3791,6 +3791,16 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CAVIUM, 0xa100, quirk_no_bus_reset);
  */
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, 0xb005, quirk_no_bus_reset);
 
+/*
+ * Reports from users making use of PCI device assignment with ASM1164
+ * controllers indicate an issue with bus reset where the device fails to
+ * retrain.  The issue appears more common in configurations with multiple
+ * controllers.  The device does indicate PM reset support (NoSoftRst-),
+ * therefore this still leaves a viable reset method.
+ * https://forum.proxmox.com/threads/problems-with-pcie-passthrough-with-two-identical-devices.149003/
+ */
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ASMEDIA, 0x1164, quirk_no_bus_reset);
+
 static void quirk_no_pm_reset(struct pci_dev *dev)
 {
 	/*
-- 
2.51.0