On Tue, Sep 16, 2014 at 3:27 PM, Yinghai Lu <yinghai@xxxxxxxxxx> wrote:
> On Tue, Sep 16, 2014 at 1:21 PM, Joseph Salisbury
> <joseph.salisbury@xxxxxxxxxxxxx> wrote:
>>
>> A new bug[0] was opened due to enabling PCI_REALLOC_ENABLE_AUTO, which
>> is similar to the original bug[1] we discussed.
>>
>> Just wondering if there have been any additional ideas on realloc since
>> this was last discussed?
>>
>> [0] http://pad.lv/1363313
>
> So the resource realloc do work as expected. but LSI firmware has some
> problem again?
>
> We may need to add command after the reset the bridge resource.
Can you try attached patch?
Thanks
Yinghai
---
drivers/pci/setup-bus.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
Index: linux-2.6/drivers/pci/setup-bus.c
===================================================================
--- linux-2.6.orig/drivers/pci/setup-bus.c
+++ linux-2.6/drivers/pci/setup-bus.c
@@ -1615,6 +1615,22 @@ again:
fail_res->flags & type_mask,
rel_type);
+ /* reset LSI device */
+ list_for_each_entry(fail_res, &fail_head, list) {
+ struct pci_dev *pdev;
+ struct pci_bus *pbus = fail_res->dev->bus;
+
+ if (pci_is_root_bus(pbus) || !pbus->self)
+ continue;
+
+ /* LSI device firmware is not happy with changing BAR value */
+ list_for_each_entry(pdev, &pbus->devices, bus_list)
+ if (pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC) {
+ pci_reset_secondary_bus(pbus->self);
+ break;
+ }
+ }
+
/* restore size and flags */
list_for_each_entry(fail_res, &fail_head, list) {
struct resource *res = fail_res->res;
