linux-kernel - [PATCH v11 13/14] powerpc/vas: Free send window in VAS instance after credits returned

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Message-ID: <1587017256.2275.1076.camel@hbabu-laptop>
Date:   Wed, 15 Apr 2020 23:07:36 -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, linux-kernel@...r.kernel.org,
        npiggin@...il.com, hch@...radead.org, oohall@...il.com,
        clg@...d.org, herbert@...dor.apana.org.au,
        sukadev@...ux.vnet.ibm.com, linuxppc-dev@...ts.ozlabs.org,
        ajd@...ux.ibm.com
Subject: [PATCH v11 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 d0c07cf..e15b405 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