mt76: dma: use kzalloc instead of devm_kzalloc for txwi

dma unmap is already needed for cleanup anyway, so we don't need the extra
tracking and can save a bit of memory here

Signed-off-by: Felix Fietkau <nbd@nbd.name>

diff --git a/drivers/net/wireless/mediatek/mt76/dma.c b/drivers/net/wireless/mediatek/mt76/dma.c
index 02daeef..09dc37b 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/dma.c
+++ b/drivers/net/wireless/mediatek/mt76/dma.c
@@ -16,7 +16,7 @@ mt76_alloc_txwi(struct mt76_dev *dev)
        int size;
 
        size = L1_CACHE_ALIGN(dev->drv->txwi_size + sizeof(*t));
-       txwi = devm_kzalloc(dev->dev, size, GFP_ATOMIC);
+       txwi = kzalloc(size, GFP_ATOMIC);
        if (!txwi)
                return NULL;
 
@@ -73,9 +73,11 @@ mt76_free_pending_txwi(struct mt76_dev *dev)
        struct mt76_txwi_cache *t;
 
        local_bh_disable();
-       while ((t = __mt76_get_txwi(dev)) != NULL)
+       while ((t = __mt76_get_txwi(dev)) != NULL) {
                dma_unmap_single(dev->dev, t->dma_addr, dev->drv->txwi_size,
                                 DMA_TO_DEVICE);
+               kfree(mt76_get_txwi_ptr(dev, t));
+       }
        local_bh_enable();
 }