Quoting Dan Carpenter (2020-01-24 10:13:12)
> This is always called with IRQs disabled and we don't actually want to
> enable IRQs at the end.
>
> Fixes: a6aa8fca4d79 ("dma-buf/sw-sync: Reduce irqsave/irqrestore from known context")
> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> ---
> drivers/dma-buf/sync_debug.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/dma-buf/sync_debug.c b/drivers/dma-buf/sync_debug.c
> index 101394f16930..952331344b1c 100644
> --- a/drivers/dma-buf/sync_debug.c
> +++ b/drivers/dma-buf/sync_debug.c
> @@ -107,15 +107,16 @@ static void sync_print_fence(struct seq_file *s,
> static void sync_print_obj(struct seq_file *s, struct sync_timeline *obj)
> {
> struct list_head *pos;
> + unsigned long flags;
>
> seq_printf(s, "%s: %d\n", obj->name, obj->value);
>
> - spin_lock_irq(&obj->lock);
> + spin_lock_irqsave(&obj->lock, flags);
Exactly, it can be just spin_lock() as the irq state is known.
Once again I question why this [sync_debug.c] code even exists.
-Chris
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