On 3/21/2025 7:35 AM, Dan Carpenter wrote:
> If the hv_do_hypercall() succeeds on the first iteration then "ret" is
> not initialized. I re-arranged this code to make the loop clearer and
> to make it more clear that we return zero on the last line.
>
> Fixes: f5288d14069b ("Drivers: hv: Introduce mshv_root module to expose
> /dev/mshv to VMMs")
> Signed-off-by: Dan Carpenter <dan.carpen...@linaro.org>
> ---
> drivers/hv/mshv_root_hv_call.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/hv/mshv_root_hv_call.c b/drivers/hv/mshv_root_hv_call.c
> index b72b59a5068b..a74e13a32183 100644
> --- a/drivers/hv/mshv_root_hv_call.c
> +++ b/drivers/hv/mshv_root_hv_call.c
> @@ -733,7 +733,7 @@ int hv_call_map_stat_page(enum hv_stats_object_type type,
> u64 status, pfn;
> int ret;
>
> - do {
> + while (1) {
> local_irq_save(flags);
> input = *this_cpu_ptr(hyperv_pcpu_input_arg);
> output = *this_cpu_ptr(hyperv_pcpu_output_arg);
> @@ -756,11 +756,11 @@ int hv_call_map_stat_page(enum hv_stats_object_type
> type,
> hv_current_partition_id, 1);
> if (ret)
> return ret;
> - } while (!ret);
> + }
>
> *addr = page_address(pfn_to_page(pfn));
>
> - return ret;
> + return 0;
> }
>
> int hv_call_unmap_stat_page(enum hv_stats_object_type type,
Thanks Dan, I already sent a fixup for this:
https://lore.kernel.org/linux-hyperv/1742492693-21960-1-git-send-email-nunodasne...@linux.microsoft.com/
