[PATCH] cxl: Free virtual PHB when removing

[Andrew Donnellan <andrew.donnellan@au1.ibm.com>]

When adding a vPHB in cxl_pci_vphb_add(), we allocate a pci_controller
struct using pcibios_alloc_controller(). However, we don't free it in
cxl_pci_vphb_remove(), causing a leak.

Call pcibios_free_controller() in cxl_pci_vphb_remove() to free the vPHB
data structure correctly.

Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>

---

This patch depends on "powerpc/pci: export pcibios_free_controller()" [0].

[0] https://patchwork.ozlabs.org/patch/516142/
---
 drivers/misc/cxl/vphb.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/misc/cxl/vphb.c b/drivers/misc/cxl/vphb.c
index 94b5208..c241e15 100644
--- a/drivers/misc/cxl/vphb.c
+++ b/drivers/misc/cxl/vphb.c
@@ -290,8 +290,10 @@ void cxl_pci_vphb_remove(struct cxl_afu *afu)
 		return;
 
 	phb = afu->phb;
+	afu->phb = NULL;
 
 	pci_remove_root_bus(phb->bus);
+	pcibios_free_controller(phb);
 }
 
 struct cxl_afu *cxl_pci_to_afu(struct pci_dev *dev)
-- 
Andrew Donnellan              Software Engineer, OzLabs
andrew.donnellan@au1.ibm.com  Australia Development Lab, Canberra
+61 2 6201 8874 (work)        IBM Australia Limited