This is a note to let you know that I've just added the patch titled
PCI: exynos: Don't discard .remove() callback
to the 6.6-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-exynos-don-t-discard-.remove-callback.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 83a939f0fdc208ff3639dd3d42ac9b3c35607fd2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= <u.kleine-koenig@xxxxxxxxxxxxxx>
Date: Sun, 1 Oct 2023 19:02:51 +0200
Subject: PCI: exynos: Don't discard .remove() callback
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From: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
commit 83a939f0fdc208ff3639dd3d42ac9b3c35607fd2 upstream.
With CONFIG_PCI_EXYNOS=y and exynos_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:
WARNING: modpost: drivers/pci/controller/dwc/pci-exynos: section mismatch in reference: exynos_pcie_driver+0x8 (section: .data) -> exynos_pcie_remove (section: .exit.text)
(with ARCH=x86_64 W=1 allmodconfig).
Fixes: 340cba6092c2 ("pci: Add PCIe driver for Samsung Exynos")
Link: https://lore.kernel.org/r/20231001170254.2506508-2-u.kleine-koenig@xxxxxxxxxxxxxx
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Reviewed-by: Alim Akhtar <alim.akhtar@xxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/pci/controller/dwc/pci-exynos.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/pci/controller/dwc/pci-exynos.c
+++ b/drivers/pci/controller/dwc/pci-exynos.c
@@ -375,7 +375,7 @@ fail_probe:
return ret;
}
-static int __exit exynos_pcie_remove(struct platform_device *pdev)
+static int exynos_pcie_remove(struct platform_device *pdev)
{
struct exynos_pcie *ep = platform_get_drvdata(pdev);
@@ -431,7 +431,7 @@ static const struct of_device_id exynos_
static struct platform_driver exynos_pcie_driver = {
.probe = exynos_pcie_probe,
- .remove = __exit_p(exynos_pcie_remove),
+ .remove = exynos_pcie_remove,
.driver = {
.name = "exynos-pcie",
.of_match_table = exynos_pcie_of_match,
Patches currently in stable-queue which might be from u.kleine-koenig@xxxxxxxxxxxxxx are
queue-6.6/pci-keystone-don-t-discard-.probe-callback.patch
queue-6.6/pci-keystone-don-t-discard-.remove-callback.patch
queue-6.6/pci-kirin-don-t-discard-.remove-callback.patch
queue-6.6/pci-exynos-don-t-discard-.remove-callback.patch
queue-6.6/pwm-fix-double-shift-bug.patch
