Sorry for wrong title. Please ignore it. On 3/30/2020 10:09 PM, ltyker...@gmail.com wrote:
From: Tianyu Lan <tianyu....@microsoft.com>Current code initializes clock event data structure for syn timer even when it's available or not. Fix it. Signed-off-by: Tianyu Lan <tianyu....@microsoft.com> --- drivers/hv/hv.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c index 632d25674e7f..2e893768fc76 100644 --- a/drivers/hv/hv.c +++ b/drivers/hv/hv.c @@ -212,13 +212,16 @@ int hv_synic_alloc(void) tasklet_init(&hv_cpu->msg_dpc, vmbus_on_msg_dpc, (unsigned long) hv_cpu);- hv_cpu->clk_evt = kzalloc(sizeof(struct clock_event_device),- GFP_KERNEL); - if (hv_cpu->clk_evt == NULL) { - pr_err("Unable to allocate clock event device\n"); - goto err; + if (ms_hyperv.features & HV_MSR_SYNTIMER_AVAILABLE) { + hv_cpu->clk_evt = + kzalloc(sizeof(struct clock_event_device), + GFP_KERNEL); + if (hv_cpu->clk_evt == NULL) { + pr_err("Unable to allocate clock event device\n"); + goto err; + } + hv_init_clockevent_device(hv_cpu->clk_evt, cpu); } - hv_init_clockevent_device(hv_cpu->clk_evt, cpu);hv_cpu->synic_message_page =(void *)get_zeroed_page(GFP_ATOMIC);
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