From: Felix Fietkau <nbd@nbd.name>
To: linux-wireless@vger.kernel.org
Subject: [PATCH 1/3] mt76: allow drivers to drop rx packets early
Date: Wed, 15 Dec 2021 18:38:37 +0100 [thread overview]
Message-ID: <20211215173839.20853-1-nbd@nbd.name> (raw)
This can be used to free received events without allocating an extra skb
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
drivers/net/wireless/mediatek/mt76/dma.c | 19 ++++++++++++-------
drivers/net/wireless/mediatek/mt76/mt76.h | 2 ++
2 files changed, 14 insertions(+), 7 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/dma.c b/drivers/net/wireless/mediatek/mt76/dma.c
index 5e1c1506a4c6..3a9af8931c35 100644
--- a/drivers/net/wireless/mediatek/mt76/dma.c
+++ b/drivers/net/wireless/mediatek/mt76/dma.c
@@ -572,9 +572,7 @@ mt76_dma_rx_process(struct mt76_dev *dev, struct mt76_queue *q, int budget)
if (data_len < len + q->buf_offset) {
dev_kfree_skb(q->rx_head);
q->rx_head = NULL;
-
- skb_free_frag(data);
- continue;
+ goto free_frag;
}
if (q->rx_head) {
@@ -582,11 +580,14 @@ mt76_dma_rx_process(struct mt76_dev *dev, struct mt76_queue *q, int budget)
continue;
}
+ if (!more && dev->drv->rx_check &&
+ !(dev->drv->rx_check(dev, data, len)))
+ goto free_frag;
+
skb = build_skb(data, q->buf_size);
- if (!skb) {
- skb_free_frag(data);
- continue;
- }
+ if (!skb)
+ goto free_frag;
+
skb_reserve(skb, q->buf_offset);
if (q == &dev->q_rx[MT_RXQ_MCU]) {
@@ -603,6 +604,10 @@ mt76_dma_rx_process(struct mt76_dev *dev, struct mt76_queue *q, int budget)
}
dev->drv->rx_skb(dev, q - dev->q_rx, skb);
+ continue;
+
+free_frag:
+ skb_free_frag(data);
}
mt76_dma_rx_fill(dev, q);
diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h
index 239742112e16..8edbf42b4526 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76.h
+++ b/drivers/net/wireless/mediatek/mt76/mt76.h
@@ -373,6 +373,8 @@ struct mt76_driver_ops {
bool (*tx_status_data)(struct mt76_dev *dev, u8 *update);
+ bool (*rx_check)(struct mt76_dev *dev, void *data, int len);
+
void (*rx_skb)(struct mt76_dev *dev, enum mt76_rxq_id q,
struct sk_buff *skb);
--
2.34.1
next reply other threads:[~2021-12-15 17:38 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-15 17:38 Felix Fietkau [this message]
2021-12-15 17:38 ` [PATCH 2/3] mt76: mt7915: process txfree and txstatus without allocating skbs Felix Fietkau
2021-12-15 17:38 ` [PATCH 3/3] mt76: mt7615: in debugfs queue stats, skip wmm index 3 on mt7663 Felix Fietkau
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20211215173839.20853-1-nbd@nbd.name \
--to=nbd@nbd.name \
--cc=linux-wireless@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox