[PATCH net 1/2] netdevsim: Ensure policer drop counter always increases

[Ido Schimmel]

From: Ido Schimmel <ido...@mellanox.com>

In case the policer drop counter is retrieved when the jiffies value is
a multiple of 64, the counter will not be incremented.

This randomly breaks a selftest [1] the reads the counter twice and
checks that it was incremented:

```
TEST: Trap policer                                                  [FAIL]
        Policer drop counter was not incremented
```

Fix by always incrementing the counter by 1.

[1] tools/testing/selftests/drivers/net/netdevsim/devlink_trap.sh

Fixes: ad188458d012 ("netdevsim: Add devlink-trap policer support")
Signed-off-by: Ido Schimmel <ido...@mellanox.com>
Reviewed-by: Jiri Pirko <j...@mellanox.com>
---
 drivers/net/netdevsim/dev.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index 68668a22b9dd..dc3ff0e20944 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -858,8 +858,7 @@ nsim_dev_devlink_trap_policer_counter_get(struct devlink 
*devlink,
                return -EINVAL;
 
        cnt = &nsim_dev->trap_data->trap_policers_cnt_arr[policer->id - 1];
-       *p_drops = *cnt;
-       *cnt += jiffies % 64;
+       *p_drops = (*cnt)++;
 
        return 0;
 }
-- 
2.26.2