Current realloc path would not shrink bridge resource through pbus_size_mem() checking with the old size. That cause problem: when "must+optional" resource allocation fails, the cached bridge resource size will prevent "must" resource to get allocated smaller resource. Clear the old resource size for last try or third and later try. Link: https://bugzilla.kernel.org/show_bug.cgi?id=81431 Tested-by: TJ <linux@xxxxxx> Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx> --- drivers/pci/setup-bus.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c index da0a259..7ffb113 100644 --- a/drivers/pci/setup-bus.c +++ b/drivers/pci/setup-bus.c @@ -2327,8 +2327,15 @@ again: struct resource *res = fail_res->res; restore_resource(fail_res, res); - if (fail_res->dev->subordinate) + if (fail_res->dev->subordinate) { res->flags = 0; + /* last or third times and later */ + if (tried_times + 1 == pci_try_num || + tried_times + 1 > 2) { + res->start = 0; + res->end = res->start - 1; + } + } } free_list(&fail_head); @@ -2400,8 +2407,12 @@ again: struct resource *res = fail_res->res; restore_resource(fail_res, res); - if (fail_res->dev->subordinate) + if (fail_res->dev->subordinate) { res->flags = 0; + /* last time */ + res->start = 0; + res->end = res->start - 1; + } } free_list(&fail_head); -- 1.8.4.5 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
