From: Vitaly Kuznetsov <vkuznets@redhat.com>
Date: Wed, 7 Dec 2016 09:16:26 +0000 (-0800)
Subject: hv: init percpu_list in hv_synic_alloc()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=3c7630d35009e6635e5b58d62de554fd5b6db5df;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

hv: init percpu_list in hv_synic_alloc()

Initializing hv_context.percpu_list in hv_synic_alloc() helps to prevent a
crash in percpu_channel_enq() when not all CPUs were online during
initialization and it naturally belongs there.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index dc11296d50fd..13937563c9db 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -457,6 +457,8 @@ int hv_synic_alloc(void)
 			pr_err("Unable to allocate post msg page\n");
 			goto err;
 		}
+
+		INIT_LIST_HEAD(&hv_context.percpu_list[cpu]);
 	}
 
 	return 0;
@@ -552,8 +554,6 @@ void hv_synic_init(void *arg)
 	rdmsrl(HV_X64_MSR_VP_INDEX, vp_index);
 	hv_context.vp_index[cpu] = (u32)vp_index;
 
-	INIT_LIST_HEAD(&hv_context.percpu_list[cpu]);
-
 	/*
 	 * Register the per-cpu clockevent source.
 	 */