FAILED: patch "[PATCH] PCI: Add device even if driver attach failed" failed to apply to 4.9-stable tree

The patch below does not apply to the 4.9-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 2194bc7c39610be7cabe7456c5f63a570604f015 Mon Sep 17 00:00:00 2001
From: Rajat Jain <[email protected]>
Date: Mon, 6 Jul 2020 16:32:40 -0700
Subject: [PATCH] PCI: Add device even if driver attach failed

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").

index 8e40b3e6da77..3cef835b375f 100644
@@ -322,12 +322,8 @@ void pci_bus_add_device(struct pci_dev *dev)
 
 	dev->match_driver = true;
 	retval = device_attach(&dev->dev);
-	if (retval < 0 && retval != -EPROBE_DEFER) {
+	if (retval < 0 && retval != -EPROBE_DEFER)
 		pci_warn(dev, "device attach failed (%d)\n", retval);
-		pci_proc_detach_device(dev);
-		pci_remove_sysfs_dev_files(dev);
-		return;
-	}
 
 	pci_dev_assign_added(dev, true);
 }