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Subject[PATCH 4.9 04/42] PCI: Add device even if driver attach failed
Date
From: Rajat Jain <rajatja@google.com>

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@google.com
Signed-off-by: Rajat Jain <rajatja@google.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: stable@vger.kernel.org # v4.6+
[sudip: use dev_warn]
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
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;
}

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