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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Sasha Levin <sashal@kernel.org>,
	kvm@vger.kernel.org, "Michael S . Tsirkin" <mst@redhat.com>,
	netdev@vger.kernel.org,
	virtualization@lists.linux-foundation.org,
	Zhu Lingshan <lingshan.zhu@intel.com>
Subject: [PATCH AUTOSEL 5.15 16/27] vhost_vdpa: don't setup irq offloading when irq_num < 0
Date: Wed,  6 Apr 2022 21:12:46 -0400	[thread overview]
Message-ID: <20220407011257.114287-16-sashal@kernel.org> (raw)
In-Reply-To: <20220407011257.114287-1-sashal@kernel.org>

From: Zhu Lingshan <lingshan.zhu@intel.com>

[ Upstream commit cce0ab2b2a39072d81f98017f7b076f3410ef740 ]

When irq number is negative(e.g., -EINVAL), the virtqueue
may be disabled or the virtqueues are sharing a device irq.
In such case, we should not setup irq offloading for a virtqueue.

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Link: https://lore.kernel.org/r/20220222115428.998334-3-lingshan.zhu@intel.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/vhost/vdpa.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index d62f05d056b7..299a99532618 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -97,8 +97,11 @@ static void vhost_vdpa_setup_vq_irq(struct vhost_vdpa *v, u16 qid)
 		return;
 
 	irq = ops->get_vq_irq(vdpa, qid);
+	if (irq < 0)
+		return;
+
 	irq_bypass_unregister_producer(&vq->call_ctx.producer);
-	if (!vq->call_ctx.ctx || irq < 0)
+	if (!vq->call_ctx.ctx)
 		return;
 
 	vq->call_ctx.producer.token = vq->call_ctx.ctx;
-- 
2.35.1

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WARNING: multiple messages have this Message-ID (diff)
From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Zhu Lingshan <lingshan.zhu@intel.com>,
	"Michael S . Tsirkin" <mst@redhat.com>,
	Sasha Levin <sashal@kernel.org>,
	jasowang@redhat.com, kvm@vger.kernel.org,
	virtualization@lists.linux-foundation.org,
	netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 5.15 16/27] vhost_vdpa: don't setup irq offloading when irq_num < 0
Date: Wed,  6 Apr 2022 21:12:46 -0400	[thread overview]
Message-ID: <20220407011257.114287-16-sashal@kernel.org> (raw)
In-Reply-To: <20220407011257.114287-1-sashal@kernel.org>

From: Zhu Lingshan <lingshan.zhu@intel.com>

[ Upstream commit cce0ab2b2a39072d81f98017f7b076f3410ef740 ]

When irq number is negative(e.g., -EINVAL), the virtqueue
may be disabled or the virtqueues are sharing a device irq.
In such case, we should not setup irq offloading for a virtqueue.

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Link: https://lore.kernel.org/r/20220222115428.998334-3-lingshan.zhu@intel.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/vhost/vdpa.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index d62f05d056b7..299a99532618 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -97,8 +97,11 @@ static void vhost_vdpa_setup_vq_irq(struct vhost_vdpa *v, u16 qid)
 		return;
 
 	irq = ops->get_vq_irq(vdpa, qid);
+	if (irq < 0)
+		return;
+
 	irq_bypass_unregister_producer(&vq->call_ctx.producer);
-	if (!vq->call_ctx.ctx || irq < 0)
+	if (!vq->call_ctx.ctx)
 		return;
 
 	vq->call_ctx.producer.token = vq->call_ctx.ctx;
-- 
2.35.1


  parent reply	other threads:[~2022-04-07  1:13 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-07  1:12 [PATCH AUTOSEL 5.15 01/27] gfs2: assign rgrp glock before compute_bitstructs Sasha Levin
2022-04-07  1:12 ` [Cluster-devel] " Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 02/27] rtc: fix use-after-free on device removal Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 03/27] rtc: pcf2127: fix bug when reading alarm registers Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 04/27] um: Cleanup syscall_handler_t definition/cast, fix warning Sasha Levin
2022-04-07  1:12   ` Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 05/27] um: port_user: Improve error handling when port-helper is not found Sasha Levin
2022-04-07  1:12   ` Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 06/27] Input: add bounds checking to input_set_capability() Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 07/27] Input: stmfts - fix reference leak in stmfts_input_open Sasha Levin
2022-04-07  1:12   ` Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 08/27] nvme-pci: add quirks for Samsung X5 SSDs Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 09/27] gfs2: Disable page faults during lockless buffered reads Sasha Levin
2022-04-07  1:12   ` [Cluster-devel] " Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 10/27] rtc: sun6i: Fix time overflow handling Sasha Levin
2022-04-07  1:12   ` Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 11/27] crypto: stm32 - fix reference leak in stm32_crc_remove Sasha Levin
2022-04-07  1:12   ` Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 12/27] crypto: x86/chacha20 - Avoid spurious jumps to other functions Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 13/27] ALSA: hda/realtek: Enable headset mic on Lenovo P360 Sasha Levin
2022-04-07  1:12   ` Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 14/27] s390/traps: improve panic message for translation-specification exception Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 15/27] s390/pci: improve zpci_dev reference counting Sasha Levin
2022-04-07  1:12 ` Sasha Levin [this message]
2022-04-07  1:12   ` [PATCH AUTOSEL 5.15 16/27] vhost_vdpa: don't setup irq offloading when irq_num < 0 Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 17/27] tools/virtio: compile with -pthread Sasha Levin
2022-04-07  1:12   ` Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 18/27] nvmet: use a private workqueue instead of the system workqueue Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 19/27] nvme-multipath: fix hang when disk goes live over reconnect Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 20/27] rtc: mc146818-lib: Fix the AltCentury for AMD platforms Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 21/27] fs: fix an infinite loop in iomap_fiemap Sasha Levin
2022-04-07 11:28   ` Amir Goldstein
2022-04-07 11:30     ` Amir Goldstein
2022-05-17 17:33       ` Amir Goldstein
2022-05-18 12:24         ` Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 22/27] MIPS: lantiq: check the return value of kzalloc() Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 23/27] drbd: remove usage of list iterator variable after loop Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 24/27] platform/chrome: cros_ec_debugfs: detach log reader wq from devm Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 25/27] ARM: 9191/1: arm/stacktrace, kasan: Silence KASAN warnings in unwind_frame() Sasha Levin
2022-04-07  1:12   ` Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 26/27] nilfs2: fix lockdep warnings in page operations for btree nodes Sasha Levin
2022-04-07  1:12   ` Sasha Levin
2022-04-07  1:12 ` [PATCH AUTOSEL 5.15 27/27] nilfs2: fix lockdep warnings during disk space reclamation Sasha Levin
2022-04-07  1:12   ` Sasha Levin

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