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From: Haren Myneni <haren@linux.ibm.com>
To: mpe@ellerman.id.au
Cc: npiggin@gmail.com, mikey@neuling.org,
	herbert@gondor.apana.org.au, frederic.barrat@fr.ibm.com,
	srikar@linux.vnet.ibm.com, linux-kernel@vger.kernel.org,
	hch@infradead.org, oohall@gmail.com, clg@kaod.org,
	sukadev@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org,
	ajd@linux.ibm.com
Subject: [PATCH v9 13/13] powerpc/vas: Free send window in VAS instance after credits returned
Date: Wed, 01 Apr 2020 14:32:05 -0700	[thread overview]
Message-ID: <1585776725.10664.457.camel@hbabu-laptop> (raw)
In-Reply-To: <1585775978.10664.438.camel@hbabu-laptop>


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@linux.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 c8644c3..be900ad 100644
--- a/arch/powerpc/platforms/powernv/vas-window.c
+++ b/arch/powerpc/platforms/powernv/vas-window.c
@@ -1317,14 +1317,14 @@ 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




      parent reply	other threads:[~2020-04-01 21:33 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-01 21:19 [PATCH v9 00/13] powerpc/vas: Page fault handling for user space NX requests Haren Myneni
2020-04-01 21:25 ` [PATCH v9 01/13] powerpc/xive: Define xive_native_alloc_irq_on_chip() Haren Myneni
2020-04-01 21:25 ` [PATCH v9 02/13] powerpc/vas: Define nx_fault_stamp in coprocessor_request_block Haren Myneni
2020-04-01 21:26 ` [PATCH v9 03/13] powerpc/vas: Alloc and setup IRQ and trigger port address Haren Myneni
2020-04-01 21:26 ` [PATCH v9 04/13] powerpc/vas: Setup fault window per VAS instance Haren Myneni
2020-04-01 21:27 ` [PATCH v9 05/13] powerpc/vas: Register NX with fault window ID and IRQ port value Haren Myneni
2020-04-01 21:28 ` [PATCH 06/13] powerpc/vas: Take reference to PID and mm for user space windows Haren Myneni
2020-04-01 22:13   ` [PATCH v9 " Haren Myneni
2020-04-01 21:28 ` [PATCH v9 07/13] powerpc/vas: Setup thread IRQ handler per VAS instance Haren Myneni
2020-04-01 21:29 ` [PATCH v9 08/13] powerpc/vas: Update CSB and notify process for fault CRBs Haren Myneni
2020-04-01 21:29 ` [PATCH v9 09/13] powerpc/vas: Return credits after handling fault Haren Myneni
2020-04-01 21:30 ` [PATCH v9 10/13] powerpc/vas: Print CRB and FIFO values Haren Myneni
2020-04-01 21:31 ` [PATCH v9 11/13] powerpc/vas: Do not use default credits for receive window Haren Myneni
2020-04-01 21:31 ` [PATCH v9 12/13] powerpc/vas: Display process stuck message Haren Myneni
2020-04-01 21:32 ` Haren Myneni [this message]

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