diff options
Diffstat (limited to 'drivers/net/ethernet/google/gve/gve_utils.c')
| -rw-r--r-- | drivers/net/ethernet/google/gve/gve_utils.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/net/ethernet/google/gve/gve_utils.c b/drivers/net/ethernet/google/gve/gve_utils.c index a0607a824ab9..93f3dcbeeea9 100644 --- a/drivers/net/ethernet/google/gve/gve_utils.c +++ b/drivers/net/ethernet/google/gve/gve_utils.c @@ -64,3 +64,18 @@ struct sk_buff *gve_rx_copy(struct net_device *dev, struct napi_struct *napi, return skb; } +void gve_dec_pagecnt_bias(struct gve_rx_slot_page_info *page_info) +{ + page_info->pagecnt_bias--; + if (page_info->pagecnt_bias == 0) { + int pagecount = page_count(page_info->page); + + /* If we have run out of bias - set it back up to INT_MAX + * minus the existing refs. + */ + page_info->pagecnt_bias = INT_MAX - pagecount; + + /* Set pagecount back up to max. */ + page_ref_add(page_info->page, INT_MAX - pagecount); + } +} |