This is a note to let you know that I've just added the patch titled PCI: Add device even if driver attach failed to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: pci-add-device-even-if-driver-attach-failed.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 2194bc7c39610be7cabe7456c5f63a570604f015 Mon Sep 17 00:00:00 2001 From: Rajat Jain <rajatja@xxxxxxxxxx> Date: Mon, 6 Jul 2020 16:32:40 -0700 Subject: PCI: Add device even if driver attach failed From: Rajat Jain <rajatja@xxxxxxxxxx> commit 2194bc7c39610be7cabe7456c5f63a570604f015 upstream. device_attach() returning failure indicates a driver error while trying to probe the device. In such a scenario, the PCI device should still be added in the system and be visible to the user. When device_attach() fails, merely warn about it and keep the PCI device in the system. This partially reverts ab1a187bba5c ("PCI: Check device_attach() return value always"). Link: https://lore.kernel.org/r/20200706233240.3245512-1-rajatja@xxxxxxxxxx Signed-off-by: Rajat Jain <rajatja@xxxxxxxxxx> Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx # v4.6+ [sudip: use dev_warn] Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/pci/bus.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) --- a/drivers/pci/bus.c +++ b/drivers/pci/bus.c @@ -324,12 +324,8 @@ void pci_bus_add_device(struct pci_dev * dev->match_driver = true; retval = device_attach(&dev->dev); - if (retval < 0 && retval != -EPROBE_DEFER) { + if (retval < 0 && retval != -EPROBE_DEFER) dev_warn(&dev->dev, "device attach failed (%d)\n", retval); - pci_proc_detach_device(dev); - pci_remove_sysfs_dev_files(dev); - return; - } dev->is_added = 1; } Patches currently in stable-queue which might be from rajatja@xxxxxxxxxx are queue-4.9/pci-add-device-even-if-driver-attach-failed.patch