mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-30 06:10:56 +00:00
Code Issues Releases Wiki Activity

net: stmmac: avoid rx queue overrun

Browse source 
dma_rx_size can be set as low as 64. Rx budget might be higher than
that. Make sure to not overrun allocated rx buffers when budget is
larger.

Leave one descriptor unused to avoid wrap around of 'dirty_rx' vs
'cur_rx'.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Fixes: 47dd7a540b ("net: add support for STMicroelectronics Ethernet controllers.")
Link: https://lore.kernel.org/r/d95413e44c97d4692e72cec13a75f894abeb6998.1699897370.git.baruch@tkos.co.il
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Baruch Siach 2023-11-13 19:42:50 +02:00 committed by Jakub Kicinski
parent fa02de9e75
commit b6cb454185
1 changed files with 1 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
View file

@ -5293,6 +5293,7 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue)
dma_dir = page_pool_get_dma_dir(rx_q->page_pool);
buf_sz = DIV_ROUND_UP(priv->dma_conf.dma_buf_sz, PAGE_SIZE) * PAGE_SIZE;
limit = min(priv->dma_conf.dma_rx_size - 1, (unsigned int)limit);
if (netif_msg_rx_status(priv)) {
void *rx_head;