From 69ec73efd37cf1e28684747fd4e20598b366b8a4 Mon Sep 17 00:00:00 2001
From: Geoffrey McRae <geoff@hostfission.com>
Date: Sun, 15 Nov 2020 15:35:41 +1100
Subject: [PATCH] [hook] disable TCO for the hooked function

---
 dkms.conf  | 2 +-
 src/hook.c | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/dkms.conf b/dkms.conf
index adcf465..296b59f 100644
--- a/dkms.conf
+++ b/dkms.conf
@@ -1,5 +1,5 @@
 PACKAGE_NAME="vendor-reset"
-PACKAGE_VERSION="0.0.16"
+PACKAGE_VERSION="0.0.17"
 BUILT_MODULE_NAME[0]="${PACKAGE_NAME}"
 MAKE[0]="make KDIR=${kernel_source_dir}"
 CLEAN="make KDIR=${kernel_source_dir} clean"
diff --git a/src/hook.c b/src/hook.c
index 7f31b48..57d5af7 100644
--- a/src/hook.c
+++ b/src/hook.c
@@ -29,6 +29,8 @@ module_param(install_hook, bool, 0);
 static bool hook_installed = false;
 static int (*orig_pci_dev_specific_reset)(struct pci_dev *dev, int probe);
 
+/* TCO breaks the hook, we must disable it for this function */
+__attribute__((optimize("-fno-optimize-sibling-calls")))
 static int hooked_pci_dev_specific_reset(struct pci_dev *dev, int probe)
 {
   int ret;