6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
commit 3064ef2e88c1629c1e67a77d7bc20020b35846f2 upstream.
With CONFIG_PCIE_KIRIN=y and kirin_pcie_remove() marked with __exit, the
function is discarded from the driver. In this case a bound device can
still get unbound, e.g via sysfs. Then no cleanup code is run resulting in
resource leaks or worse.
The right thing to do is do always have the remove callback available.
This fixes the following warning by modpost:
drivers/pci/controller/dwc/pcie-kirin: section mismatch in reference: kirin_pcie_driver+0x8 (section: .data) -> kirin_pcie_remove (section: .exit.text)
(with ARCH=x86_64 W=1 allmodconfig).
Fixes: 000f60db784b ("PCI: kirin: Add support for a PHY layer")
Link: https://lore.kernel.org/r/20231001170254.2506508-3-u.kleine-koenig@xxxxxxxxxxxxxx
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/pci/controller/dwc/pcie-kirin.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/pci/controller/dwc/pcie-kirin.c
+++ b/drivers/pci/controller/dwc/pcie-kirin.c
@@ -741,7 +741,7 @@ err:
return ret;
}
-static int __exit kirin_pcie_remove(struct platform_device *pdev)
+static int kirin_pcie_remove(struct platform_device *pdev)
{
struct kirin_pcie *kirin_pcie = platform_get_drvdata(pdev);
@@ -818,7 +818,7 @@ static int kirin_pcie_probe(struct platf
static struct platform_driver kirin_pcie_driver = {
.probe = kirin_pcie_probe,
- .remove = __exit_p(kirin_pcie_remove),
+ .remove = kirin_pcie_remove,
.driver = {
.name = "kirin-pcie",
.of_match_table = kirin_pcie_match,
