4.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Niklas Cassel <niklas.cassel@xxxxxxxx>
commit 0c47cd7a9b6c9c36c08113e594e9ad017fb17865 upstream.
func_no is a member of struct pci_epf.
Since struct pci_epf is used as an argument to pci_epc_add_epf() (to
bind an endpoint function to a controller), struct pci_epf.func_no
should be populated before calling pci_epc_add_epf().
Initialize the struct pci_epf.func_no member before calling
pci_epc_add_epf(), to fix the endpoint function binding to
an endpoint controller.
Fixes: d74679911610 ("PCI: endpoint: Introduce configfs entry for configuring EP functions")
Signed-off-by: Niklas Cassel <niklas.cassel@xxxxxxxx>
[lorenzo.pieralisi@xxxxxxx: rewrote the commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
Suggested-by: Kishon Vijay Abraham I <kishon@xxxxxx>
Acked-by: Kishon Vijay Abraham I <kishon@xxxxxx>
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/pci/endpoint/pci-ep-cfs.c | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)
--- a/drivers/pci/endpoint/pci-ep-cfs.c
+++ b/drivers/pci/endpoint/pci-ep-cfs.c
@@ -97,16 +97,10 @@ static int pci_epc_epf_link(struct confi
{
int ret;
u32 func_no = 0;
- struct pci_epc *epc;
- struct pci_epf *epf;
struct pci_epf_group *epf_group = to_pci_epf_group(epf_item);
struct pci_epc_group *epc_group = to_pci_epc_group(epc_item);
-
- epc = epc_group->epc;
- epf = epf_group->epf;
- ret = pci_epc_add_epf(epc, epf);
- if (ret)
- goto err_add_epf;
+ struct pci_epc *epc = epc_group->epc;
+ struct pci_epf *epf = epf_group->epf;
func_no = find_first_zero_bit(&epc_group->function_num_map,
BITS_PER_LONG);
@@ -116,6 +110,10 @@ static int pci_epc_epf_link(struct confi
set_bit(func_no, &epc_group->function_num_map);
epf->func_no = func_no;
+ ret = pci_epc_add_epf(epc, epf);
+ if (ret)
+ goto err_add_epf;
+
ret = pci_epf_bind(epf);
if (ret)
goto err_epf_bind;
