From 47e2a338222c902dc44f4f6e29eb236a68600ef4 Mon Sep 17 00:00:00 2001 From: Li RongQing Date: Mon, 16 Mar 2026 20:28:03 -0400 Subject: [PATCH] PCI/sysfs: Suppress FW_BUG warning when NUMA node already matches The numa_node sysfs interface allows users to manually override a PCI device's NUMA node assignment. Currently, every write triggers a FW_BUG warning and taints the kernel, even when writing the same value that is already set. Check if the requested node is already assigned to the device. If it matches, return success immediately without tainting the kernel or printing a warning. Signed-off-by: Li RongQing Signed-off-by: Bjorn Helgaas Link: https://patch.msgid.link/20260317002803.2353-1-lirongqing@baidu.com --- drivers/pci/pci-sysfs.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 16eaaf749ba9..dd7c9e5f993e 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -378,6 +378,9 @@ static ssize_t numa_node_store(struct device *dev, if (node != NUMA_NO_NODE && !node_online(node)) return -EINVAL; + if (node == dev->numa_node) + return count; + add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK); pci_alert(pdev, FW_BUG "Overriding NUMA node to %d. Contact your vendor for updates.", node);