From f3fd2afed8eee91620d05b69ab94c14793c849d7 Mon Sep 17 00:00:00 2001 From: Dave Jiang Date: Fri, 28 Jul 2017 15:10:48 -0700 Subject: [PATCH] ntb: transport shouldn't disable link due to bogus values in SPADs It seems that under certain scenarios the SPAD can have bogus values caused by an agent (i.e. BIOS or other software) that is not the kernel driver, and that causes memory window setup failure. This should not cause the link to be disabled because if we do that, the driver will never recover again. We have verified in testing that this issue happens and prevents proper link recovery. Signed-off-by: Dave Jiang Acked-by: Allen Hubbe Signed-off-by: Jon Mason Fixes: 84f766855f61 ("ntb: stop link work when we do not have memory") --- drivers/ntb/ntb_transport.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c index b29558d..f58d8e3 100644 --- a/drivers/ntb/ntb_transport.c +++ b/drivers/ntb/ntb_transport.c @@ -924,10 +924,8 @@ out1: ntb_free_mw(nt, i); /* if there's an actual failure, we should just bail */ - if (rc < 0) { - ntb_link_disable(ndev); + if (rc < 0) return; - } out: if (ntb_link_is_up(ndev, NULL, NULL) == 1) -- 2.7.4