linux-kernel - [PATCH 5.9 183/391] irqchip/loongson-htvec: Fix initial interrupt clearing

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20201103203359.233194998@linuxfoundation.org>
Date:   Tue,  3 Nov 2020 21:33:54 +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, Huacai Chen <chenhc@...ote.com>,
        Marc Zyngier <maz@...nel.org>
Subject: [PATCH 5.9 183/391] irqchip/loongson-htvec: Fix initial interrupt clearing

From: Huacai Chen <chenhc@...ote.com>

commit 1d1e5630de78f7253ac24b92cee6427c3ff04d56 upstream.

In htvec_reset() only the first group of initial interrupts is cleared.
This sometimes causes spurious interrupts, so let's clear all groups.

While at it, fix the nearby comment that to match the reality of what
the driver does.

Fixes: 818e915fbac518e8c78e1877 ("irqchip: Add Loongson HyperTransport Vector support")
Signed-off-by: Huacai Chen <chenhc@...ote.com>
Signed-off-by: Marc Zyngier <maz@...nel.org>
Cc: stable@...r.kernel.org
Link: https://lore.kernel.org/r/1599819978-13999-2-git-send-email-chenhc@lemote.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/irqchip/irq-loongson-htvec.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/irqchip/irq-loongson-htvec.c
+++ b/drivers/irqchip/irq-loongson-htvec.c
@@ -151,7 +151,7 @@ static void htvec_reset(struct htvec *pr
 	/* Clear IRQ cause registers, mask all interrupts */
 	for (idx = 0; idx < priv->num_parents; idx++) {
 		writel_relaxed(0x0, priv->base + HTVEC_EN_OFF + 4 * idx);
-		writel_relaxed(0xFFFFFFFF, priv->base);
+		writel_relaxed(0xFFFFFFFF, priv->base + 4 * idx);
 	}
 }
 
@@ -172,7 +172,7 @@ static int htvec_of_init(struct device_n
 		goto free_priv;
 	}
 
-	/* Interrupt may come from any of the 4 interrupt line */
+	/* Interrupt may come from any of the 8 interrupt lines */
 	for (i = 0; i < HTVEC_MAX_PARENT_IRQ; i++) {
 		parent_irq[i] = irq_of_parse_and_map(node, i);
 		if (parent_irq[i] <= 0)