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Message-Id: <20221003070723.626652120@linuxfoundation.org> Date: Mon, 3 Oct 2022 09:11:30 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Angus Chen <angus.chen@...uarmicro.com>, Jason Wang <jasowang@...hat.com>, "Michael S. Tsirkin" <mst@...hat.com>, Zhu Lingshan <lingshan.zhu@...el.com>, Sasha Levin <sashal@...nel.org> Subject: [PATCH 5.15 65/83] vdpa/ifcvf: fix the calculation of queuepair From: Angus Chen <angus.chen@...uarmicro.com> [ Upstream commit db5db1a00d0816207be3a0166fcb4f523eaf3b52 ] The q_pair_id to address a queue pair in the lm bar should be calculated by queue_id / 2 rather than queue_id / nr_vring. Fixes: 2ddae773c93b ("vDPA/ifcvf: detect and use the onboard number of queues directly") Signed-off-by: Angus Chen <angus.chen@...uarmicro.com> Reviewed-by: Jason Wang <jasowang@...hat.com> Reviewed-by: Michael S. Tsirkin <mst@...hat.com> Acked-by: Zhu Lingshan <lingshan.zhu@...el.com> Message-Id: <20220923091013.191-1-angus.chen@...uarmicro.com> Signed-off-by: Michael S. Tsirkin <mst@...hat.com> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/vdpa/ifcvf/ifcvf_base.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/vdpa/ifcvf/ifcvf_base.c b/drivers/vdpa/ifcvf/ifcvf_base.c index 7d41dfe48ade..5091ff9d6c93 100644 --- a/drivers/vdpa/ifcvf/ifcvf_base.c +++ b/drivers/vdpa/ifcvf/ifcvf_base.c @@ -327,7 +327,7 @@ u16 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid) u32 q_pair_id; ifcvf_lm = (struct ifcvf_lm_cfg __iomem *)hw->lm_cfg; - q_pair_id = qid / hw->nr_vring; + q_pair_id = qid / 2; avail_idx_addr = &ifcvf_lm->vring_lm_cfg[q_pair_id].idx_addr[qid % 2]; last_avail_idx = ifc_ioread16(avail_idx_addr); @@ -341,7 +341,7 @@ int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u16 num) u32 q_pair_id; ifcvf_lm = (struct ifcvf_lm_cfg __iomem *)hw->lm_cfg; - q_pair_id = qid / hw->nr_vring; + q_pair_id = qid / 2; avail_idx_addr = &ifcvf_lm->vring_lm_cfg[q_pair_id].idx_addr[qid % 2]; hw->vring[qid].last_avail_idx = num; ifc_iowrite16(num, avail_idx_addr); -- 2.35.1
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