From: Jakub Kicinski kubak...@wp.pl
Signed-off-by: Jakub Kicinski kubak...@wp.pl
---
drivers/net/wireless/mediatek/mt7601u/dma.c | 62 ++---
1 file changed, 12 insertions(+), 50 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt7601u/dma.c
b/drivers/net/wireless/mediatek/mt7601u/dma.c
index 9c9e1288644b..16df67b2e62c 100644
--- a/drivers/net/wireless/mediatek/mt7601u/dma.c
+++ b/drivers/net/wireless/mediatek/mt7601u/dma.c
@@ -34,56 +34,28 @@ static unsigned int ieee80211_get_hdrlen_from_buf(const u8
*data, unsigned len)
static struct sk_buff *
mt7601u_rx_skb_from_seg(struct mt7601u_dev *dev, struct mt7601u_rxwi *rxwi,
- u8 *data, u32 seg_len)
+ void *data, u32 seg_len, u32 truesize, struct page *p)
{
struct sk_buff *skb;
u32 true_len;
+ int hdr_len, copy, frag;
- if (rxwi-rxinfo cpu_to_le32(MT_RXINFO_L2PAD))
- seg_len -= 2;
-
- skb = alloc_skb(seg_len, GFP_ATOMIC);
- if (!skb)
- return NULL;
-
- if (rxwi-rxinfo cpu_to_le32(MT_RXINFO_L2PAD)) {
- int hdr_len = ieee80211_get_hdrlen_from_buf(data, seg_len);
-
- memcpy(skb_put(skb, hdr_len), data, hdr_len);
- data += hdr_len + 2;
- seg_len -= hdr_len;
- }
-
- memcpy(skb_put(skb, seg_len), data, seg_len);
-
- true_len = mt76_mac_process_rx(dev, skb, skb-data, rxwi);
- skb_trim(skb, true_len);
-
- return skb;
-}
-
-static struct sk_buff *
-mt7601u_rx_skb_from_seg_paged(struct mt7601u_dev *dev,
- struct mt7601u_rxwi *rxwi, void *data,
- u32 seg_len, u32 truesize, struct page *p)
-{
- unsigned int hdr_len = ieee80211_get_hdrlen_from_buf(data, seg_len);
- unsigned int true_len, copy, frag;
- struct sk_buff *skb;
-
- skb = alloc_skb(128, GFP_ATOMIC);
+ skb = alloc_skb(p ? 128 : seg_len, GFP_ATOMIC);
if (!skb)
return NULL;
true_len = mt76_mac_process_rx(dev, skb, data, rxwi);
+ hdr_len = ieee80211_get_hdrlen_from_buf(data, true_len);
if (rxwi-rxinfo cpu_to_le32(MT_RXINFO_L2PAD)) {
memcpy(skb_put(skb, hdr_len), data, hdr_len);
+
data += hdr_len + 2;
true_len -= hdr_len;
hdr_len = 0;
}
+ /* If not doing paged RX allocated skb will always have enough space */
copy = (true_len = skb_tailroom(skb)) ? true_len : hdr_len + 8;
frag = true_len - copy;
@@ -100,7 +72,7 @@ mt7601u_rx_skb_from_seg_paged(struct mt7601u_dev *dev,
}
static void mt7601u_rx_process_seg(struct mt7601u_dev *dev, u8 *data,
- u32 seg_len, struct page *p, bool paged)
+ u32 seg_len, struct page *p)
{
struct sk_buff *skb;
struct mt7601u_rxwi *rxwi;
@@ -126,11 +98,7 @@ static void mt7601u_rx_process_seg(struct mt7601u_dev *dev,
u8 *data,
trace_mt_rx(dev, rxwi, fce_info);
- if (paged)
- skb = mt7601u_rx_skb_from_seg_paged(dev, rxwi, data, seg_len,
- truesize, p);
- else
- skb = mt7601u_rx_skb_from_seg(dev, rxwi, data, seg_len);
+ skb = mt7601u_rx_skb_from_seg(dev, rxwi, data, seg_len, truesize, p);
if (!skb)
return;
@@ -158,23 +126,17 @@ mt7601u_rx_process_entry(struct mt7601u_dev *dev, struct
mt7601u_dma_buf_rx *e)
u32 seg_len, data_len = e-urb-actual_length;
u8 *data = page_address(e-p);
struct page *new_p = NULL;
- bool paged = true;
int cnt = 0;
if (!test_bit(MT7601U_STATE_INITIALIZED, dev-state))
return;
/* Copy if there is very little data in the buffer. */
- if (data_len 512) {
- paged = false;
- } else {
+ if (data_len 512)
new_p = dev_alloc_pages(MT_RX_ORDER);
- if (!new_p)
- paged = false;
- }
while ((seg_len = mt7601u_rx_next_seg_len(data, data_len))) {
- mt7601u_rx_process_seg(dev, data, seg_len, e-p, paged);
+ mt7601u_rx_process_seg(dev, data, seg_len, new_p ? e-p : NULL);
data_len -= seg_len;
data += seg_len;
@@ -182,9 +144,9 @@ mt7601u_rx_process_entry(struct mt7601u_dev *dev, struct
mt7601u_dma_buf_rx *e)
}
if (cnt 1)
- trace_mt_rx_dma_aggr(dev, cnt, paged);
+ trace_mt_rx_dma_aggr(dev, cnt, !!new_p);
- if (paged) {
+ if (new_p) {
/* we have one extra ref from the allocator */
__free_pages(e-p, MT_RX_ORDER);
--
2.1.0
--
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