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mt76: dma: add skb check for dummy pointer

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Introduce skb check for dummy address in mt76_dma_tx_cleanup_idx.
This is a preliminary patch to add support for new chipsets (e.g. 7615)

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Lorenzo Bianconi
2019-04-02 11:47:59 +02:00
committed by Felix Fietkau
parent 6ca66722a8
commit 598da38672
2 changed files with 7 additions and 4 deletions
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9
drivers/net/wireless/mediatek/mt76/dma.c
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@@ -18,8 +18,6 @@
#include "mt76.h"
#include "dma.h"
#define DMA_DUMMY_TXWI ((void *) ~0)
static int
mt76_dma_alloc_queue(struct mt76_dev *dev, struct mt76_queue *q,
int idx, int n_desc, int bufsize,
@@ -67,7 +65,7 @@ mt76_dma_add_buf(struct mt76_dev *dev, struct mt76_queue *q,
int i, idx = -1;
if (txwi)
q->entry[q->head].txwi = DMA_DUMMY_TXWI;
q->entry[q->head].txwi = DMA_DUMMY_DATA;
for (i = 0; i < nbufs; i += 2, buf += 2) {
u32 buf0 = buf[0].addr, buf1 = 0;
@@ -126,9 +124,12 @@ mt76_dma_tx_cleanup_idx(struct mt76_dev *dev, struct mt76_queue *q, int idx,
DMA_TO_DEVICE);
}
if (e->txwi == DMA_DUMMY_TXWI)
if (e->txwi == DMA_DUMMY_DATA)
e->txwi = NULL;
if (e->skb == DMA_DUMMY_DATA)
e->skb = NULL;
*prev_e = *e;
memset(e, 0, sizeof(*e));
}