linux-kernel - [PATCH 5.4 140/203] MIPS: PCI: remember nasid changed by set interrupt affinity

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Message-Id: <20200116231757.243032912@linuxfoundation.org>
Date:   Fri, 17 Jan 2020 00:17:37 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Thomas Bogendoerfer <tbogendoerfer@...e.de>,
        Paul Burton <paulburton@...nel.org>,
        Ralf Baechle <ralf@...ux-mips.org>,
        James Hogan <jhogan@...nel.org>, linux-mips@...r.kernel.org
Subject: [PATCH 5.4 140/203] MIPS: PCI: remember nasid changed by set interrupt affinity

From: Thomas Bogendoerfer <tbogendoerfer@...e.de>

commit 37640adbefd66491cb8083a438f7bf366ac09bc7 upstream.

When changing interrupt affinity remember the possible changed nasid,
otherwise an interrupt deactivate/activate sequence will incorrectly
setup interrupt.

Fixes: e6308b6d35ea ("MIPS: SGI-IP27: abstract chipset irq from bridge")
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@...e.de>
Signed-off-by: Paul Burton <paulburton@...nel.org>
Cc: Ralf Baechle <ralf@...ux-mips.org>
Cc: James Hogan <jhogan@...nel.org>
Cc: linux-mips@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/mips/pci/pci-xtalk-bridge.c |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

--- a/arch/mips/pci/pci-xtalk-bridge.c
+++ b/arch/mips/pci/pci-xtalk-bridge.c
@@ -279,16 +279,15 @@ static int bridge_set_affinity(struct ir
 	struct bridge_irq_chip_data *data = d->chip_data;
 	int bit = d->parent_data->hwirq;
 	int pin = d->hwirq;
-	nasid_t nasid;
 	int ret, cpu;
 
 	ret = irq_chip_set_affinity_parent(d, mask, force);
 	if (ret >= 0) {
 		cpu = cpumask_first_and(mask, cpu_online_mask);
-		nasid = COMPACT_TO_NASID_NODEID(cpu_to_node(cpu));
+		data->nnasid = COMPACT_TO_NASID_NODEID(cpu_to_node(cpu));
 		bridge_write(data->bc, b_int_addr[pin].addr,
 			     (((data->bc->intr_addr >> 30) & 0x30000) |
-			      bit | (nasid << 8)));
+			      bit | (data->nasid << 8)));
 		bridge_read(data->bc, b_wid_tflush);
 	}
 	return ret;