Messages in this thread Patch in this message | | | From | ltykernel@gmail ... | Subject | [Update PATCH] x86/Hyper-V: Initialize Syn timer clock when it's | Date | Mon, 30 Mar 2020 07:17:08 -0700 |
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From: Tianyu Lan <Tianyu.Lan@microsoft.com>
Current code initializes clock event data structure for syn timer even when it's not available. Fix it.
Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com> --- - Fix the wrong title. 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); -- 2.14.5
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