| From 59009d9c396ca20ddc29596356f92c4019c24506 Mon Sep 17 00:00:00 2001 |
| From: Vitaly Kuznetsov <vkuznets@redhat.com> |
| Date: Wed, 7 Dec 2016 01:16:26 -0800 |
| Subject: [PATCH] hv: init percpu_list in hv_synic_alloc() |
| |
| commit 3c7630d35009e6635e5b58d62de554fd5b6db5df upstream. |
| |
| 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> |
| Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> |
| |
| diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c |
| index 069217c1bfed..99a8269f14b2 100644 |
| --- a/drivers/hv/hv.c |
| +++ b/drivers/hv/hv.c |
| @@ -455,6 +455,8 @@ 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; |
| @@ -550,8 +552,6 @@ 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. |
| */ |
| -- |
| 2.12.0 |
| |
