6.6-stable review patch. If anyone has any objections, please let me know.
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From: Jakub Kicinski kuba@kernel.org
[ Upstream commit 5546da79e6cc5bb3324bf25688ed05498fd3f86d ]
This reverts commit b514c47ebf41a6536551ed28a05758036e6eca7c.
The commit describes that we don't have to sync the page when recycling, and it tries to optimize that case. But we do need to sync after allocation. Recycling side should be changed to pass the right sync size instead.
Fixes: b514c47ebf41 ("net: stmmac: set PP_FLAG_DMA_SYNC_DEV only if XDP is enabled") Reported-by: Jon Hunter jonathanh@nvidia.com Link: https://lore.kernel.org/20241004070846.2502e9ea@kernel.org Reviewed-by: Jacob Keller jacob.e.keller@intel.com Reviewed-by: Furong Xu 0x1207@gmail.com Link: https://patch.msgid.link/20241004142115.910876-1-kuba@kernel.org Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 89a80e3e8bb88..d6167a7b19f21 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -2018,7 +2018,7 @@ static int __alloc_dma_rx_desc_resources(struct stmmac_priv *priv, rx_q->queue_index = queue; rx_q->priv_data = priv;
- pp_params.flags = PP_FLAG_DMA_MAP | (xdp_prog ? PP_FLAG_DMA_SYNC_DEV : 0); + pp_params.flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV; pp_params.pool_size = dma_conf->dma_rx_size; num_pages = DIV_ROUND_UP(dma_conf->dma_buf_sz, PAGE_SIZE); pp_params.order = ilog2(num_pages);