From 9143595a7e05a848384c240d34abcc4740a65897 Mon Sep 17 00:00:00 2001 From: Joey Zhang Date: Mon, 7 Jan 2019 11:12:56 +0800 Subject: NTB: ntb_transport: Free MWs in ntb_transport_link_cleanup() If NTB peer host crashes or reboots, the NTB transport link will be down and the MWs of NTB transport will be invalid. But the ntb_transport_link_cleanup() does not free these invalid MWs. When the NTB peer host is recovered later, NTB transport link will be up and the ntb_set_mw() will not reset up MWs. Because the MWs of NTB transport are invalid, the NTB transport will not work. We can fix it by freeing MWs when NTB transport link is down, then the ntb_set_mw() will reset up MWs when NTB transport link is up. Signed-off-by: Joey Zhang Reviewed-by: Logan Gunthorpe Signed-off-by: Jon Mason --- drivers/ntb/ntb_transport.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/ntb') diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c index 3bfdb4562408..6e8902d03a69 100644 --- a/drivers/ntb/ntb_transport.c +++ b/drivers/ntb/ntb_transport.c @@ -862,6 +862,9 @@ static void ntb_transport_link_cleanup(struct ntb_transport_ctx *nt) if (!nt->link_is_up) cancel_delayed_work_sync(&nt->link_work); + for (i = 0; i < nt->mw_count; i++) + ntb_free_mw(nt, i); + /* The scratchpad registers keep the values if the remote side * goes down, blast them now to give them a sane value the next * time they are accessed -- cgit