linux-kernel - [irqchip: irq/irqchip-fixes] irqchip/irq-gic-v3-its.c: Force synchronisation when issuing INVALL

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Date:   Wed, 08 Dec 2021 11:17:46 -0000
From:   "irqchip-bot for Wudi Wang" <tip-bot2@...utronix.de>
To:     linux-kernel@...r.kernel.org
Cc:     Wudi Wang <wangwudi@...ilicon.com>,
        Shaokun Zhang <zhangshaokun@...ilicon.com>,
        Marc Zyngier <maz@...nel.org>, tglx@...utronix.de
Subject: [irqchip: irq/irqchip-fixes] irqchip/irq-gic-v3-its.c: Force
 synchronisation when issuing INVALL

The following commit has been merged into the irq/irqchip-fixes branch of irqchip:

Commit-ID:     b383a42ca523ce54bcbd63f7c8f3cf974abc9b9a
Gitweb:        https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms/b383a42ca523ce54bcbd63f7c8f3cf974abc9b9a
Author:        Wudi Wang <wangwudi@...ilicon.com>
AuthorDate:    Wed, 08 Dec 2021 09:54:29 +08:00
Committer:     Marc Zyngier <maz@...nel.org>
CommitterDate: Wed, 08 Dec 2021 11:13:18 

irqchip/irq-gic-v3-its.c: Force synchronisation when issuing INVALL

INVALL CMD specifies that the ITS must ensure any caching associated with
the interrupt collection defined by ICID is consistent with the LPI
configuration tables held in memory for all Redistributors. SYNC is
required to ensure that INVALL is executed.

Currently, LPI configuration data may be inconsistent with that in the
memory within a short period of time after the INVALL command is executed.

Signed-off-by: Wudi Wang <wangwudi@...ilicon.com>
Signed-off-by: Shaokun Zhang <zhangshaokun@...ilicon.com>
Signed-off-by: Marc Zyngier <maz@...nel.org>
Fixes: cc2d3216f53c ("irqchip: GICv3: ITS command queue")
Link: https://lore.kernel.org/r/20211208015429.5007-1-zhangshaokun@hisilicon.com
---
 drivers/irqchip/irq-gic-v3-its.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index eb0882d..0cb584d 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -742,7 +742,7 @@ static struct its_collection *its_build_invall_cmd(struct its_node *its,
 
 	its_fixup_cmd(cmd);
 
-	return NULL;
+	return desc->its_invall_cmd.col;
 }
 
 static struct its_vpe *its_build_vinvall_cmd(struct its_node *its,