diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/701-net-0046-sdk_dpaa-update-buffer-recycling-conditions.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/701-net-0046-sdk_dpaa-update-buffer-recycling-conditions.patch | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/701-net-0046-sdk_dpaa-update-buffer-recycling-conditions.patch b/target/linux/layerscape/patches-5.4/701-net-0046-sdk_dpaa-update-buffer-recycling-conditions.patch new file mode 100644 index 0000000000..daad07483c --- /dev/null +++ b/target/linux/layerscape/patches-5.4/701-net-0046-sdk_dpaa-update-buffer-recycling-conditions.patch @@ -0,0 +1,31 @@ +From b95f457bb7ba38f03a71b474e35f53670322f0db Mon Sep 17 00:00:00 2001 +From: Camelia Groza <camelia.groza@nxp.com> +Date: Mon, 15 Jan 2018 17:41:01 +0200 +Subject: [PATCH] sdk_dpaa: update buffer recycling conditions + +Guarantee there is enough space inside the skb's headroom to store the +skb back-pointer before recycling the buffer. The back-pointer is stored +right before the buffer's start. + +Signed-off-by: Camelia Groza <camelia.groza@nxp.com> +--- + drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c | 8 +++++++- + 1 file changed, 7 insertions(+), 1 deletion(-) + +--- a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c ++++ b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c +@@ -350,7 +350,13 @@ bool dpa_buf_is_recyclable(struct sk_buf + /* left align to the nearest cacheline */ + new = (unsigned char *)((unsigned long)new & ~(SMP_CACHE_BYTES - 1)); + +- if (likely(new >= skb->head && ++ /* Make sure there is enough space to store the skb back-pointer in ++ * the headroom, right before the start of the buffer. ++ * ++ * Guarantee that both maximum size and maximum data offsets aren't ++ * crossed. ++ */ ++ if (likely(new >= (skb->head + sizeof(void *)) && + new >= (skb->data - DPA_MAX_FD_OFFSET) && + skb_end_pointer(skb) - new <= DPA_RECYCLE_MAX_SIZE)) { + *new_buf_start = new; |