linux-kernel - [PATCH v10 13/14] powerpc/vas: Free send window in VAS instance after credits returned

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Date:   Thu, 02 Apr 2020 00:19:19 -0700
From:   Haren Myneni <haren@...ux.ibm.com>
To:     mpe@...erman.id.au
Cc:     mikey@...ling.org, srikar@...ux.vnet.ibm.com,
        frederic.barrat@...ibm.com, ajd@...ux.ibm.com,
        linux-kernel@...r.kernel.org, npiggin@...il.com, hch@...radead.org,
        oohall@...il.com, clg@...d.org, sukadev@...ux.vnet.ibm.com,
        linuxppc-dev@...ts.ozlabs.org, herbert@...dor.apana.org.au
Subject: [PATCH v10 13/14] powerpc/vas: Free send window in VAS instance
 after credits returned


NX may be processing requests while trying to close window. Wait until
all credits are returned and then free send window from VAS instance.

Signed-off-by: Haren Myneni <haren@...ux.ibm.com>
---
 arch/powerpc/platforms/powernv/vas-window.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/platforms/powernv/vas-window.c b/arch/powerpc/platforms/powernv/vas-window.c
index 3d80f37..3ffad5a 100644
--- a/arch/powerpc/platforms/powernv/vas-window.c
+++ b/arch/powerpc/platforms/powernv/vas-window.c
@@ -1316,14 +1316,14 @@ int vas_win_close(struct vas_window *window)
 
 	unmap_paste_region(window);
 
-	clear_vinst_win(window);
-
 	poll_window_busy_state(window);
 
 	unpin_close_window(window);
 
 	poll_window_credits(window);
 
+	clear_vinst_win(window);
+
 	poll_window_castout(window);
 
 	/* if send window, drop reference to matching receive window */
-- 
1.8.3.1