2020-01-10 00:27:19 +08:00
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Jian Jun Chen <jian.jun.chen@intel.com>
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Date: Fri, 20 Sep 2019 11:09:24 +0800
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Subject: [PATCH] acrn/vhm: continue with the next VM if req_buf is NULL
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When /dev/acrn_vhm is opened a vhm_vm is added to the head of
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vhm_vm_list. At this time the ioreq_buffer of the vm is not set yet.
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If a failure happens for example hcall_create_vm failed due to some
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reason, this vm is left in the vhm_vm_list without a ioreq_buffer.
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io_req_tasklet will stop to iterate the vm list and io_req from
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hyervisor cannot be delivered to ioreq_client. In this case failure
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of creating a new VM will cause all the existing created/started VMs
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hang.
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v1->v2:
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Revise the commit message.
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Tracked-On: PKT-2793
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Tracked-On: projectacrn/acrn-hypervisor#3718
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Signed-off-by: Jian Jun Chen <jian.jun.chen@intel.com>
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Reviewed-by: Yin Fengwei <fengwei.yin@intel.com>
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Reviewed-by: Zhao Yakui <yakui.zhao@intel.com>
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---
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drivers/char/vhm/vhm_dev.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/drivers/char/vhm/vhm_dev.c b/drivers/char/vhm/vhm_dev.c
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2020-10-27 02:14:06 +08:00
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index 7018e7654de2..f8117e61469b 100644
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2020-01-10 00:27:19 +08:00
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--- a/drivers/char/vhm/vhm_dev.c
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+++ b/drivers/char/vhm/vhm_dev.c
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@@ -687,7 +687,7 @@ static void io_req_tasklet(unsigned long data)
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read_lock(&vhm_vm_list_lock);
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list_for_each_entry(vm, &vhm_vm_list, list) {
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if (!vm || !vm->req_buf)
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- break;
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+ continue;
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acrn_ioreq_distribute_request(vm);
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}
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--
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https://clearlinux.org
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