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 <li...@iam.tj> Signed-off-by: Yinghai Lu <ying...@kernel.org> --- 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 5b2944a..4959f72 100644 --- a/drivers/pci/setup-bus.c +++ b/drivers/pci/setup-bus.c @@ -2277,8 +2277,15 @@ again: res->start = fail_res->start; res->end = fail_res->end; res->flags = fail_res->flags; - 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); @@ -2352,8 +2359,12 @@ again: res->start = fail_res->start; res->end = fail_res->end; res->flags = fail_res->flags; - 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-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
