[PATCH net] net: ethernet: microchip: lan743x: Fix memory allocation failure

From: Thangaraj Samynathan
Date: Fri Mar 14 2025 - 03:06:03 EST


The driver allocates ring elements using GFP_ATOMIC and GFP_DMA
flags. The allocation is not done in atomic context and there is
no dependency from LAN743x hardware on memory allocation should be
in DMA_ZONE. Hence modifying the flags to use only GFP_KERNEL.

Signed-off-by: Thangaraj Samynathan <thangaraj.s@xxxxxxxxxxxxx>
---
drivers/net/ethernet/microchip/lan743x_main.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/microchip/lan743x_main.c b/drivers/net/ethernet/microchip/lan743x_main.c
index 23760b613d3e..c10b0131d5fb 100644
--- a/drivers/net/ethernet/microchip/lan743x_main.c
+++ b/drivers/net/ethernet/microchip/lan743x_main.c
@@ -2495,8 +2495,7 @@ static int lan743x_rx_process_buffer(struct lan743x_rx *rx)

/* save existing skb, allocate new skb and map to dma */
skb = buffer_info->skb;
- if (lan743x_rx_init_ring_element(rx, rx->last_head,
- GFP_ATOMIC | GFP_DMA)) {
+ if (lan743x_rx_init_ring_element(rx, rx->last_head, GFP_KERNEL)) {
/* failed to allocate next skb.
* Memory is very low.
* Drop this packet and reuse buffer.
--
2.25.1