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MIPS: lantiq: dma: add dev pointer

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dma_zalloc_coherent() now crashes if no dev pointer is given.
Add a dev pointer to the ltq_dma_channel structure and fill it in the
driver using it.

This fixes a bug introduced in kernel 4.19.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hauke Mehrtens 2018-09-09 21:26:23 +02:00 committed by David S. Miller
parent 4ecdf77091
commit 2d946e5bcd
3 changed files with 4 additions and 2 deletions
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1
arch/mips/include/asm/mach-lantiq/xway/xway_dma.h
View File

@ -40,6 +40,7 @@ struct ltq_dma_channel {
int desc; /* the current descriptor */ int desc; /* the current descriptor */
struct ltq_dma_desc *desc_base; /* the descriptor base */ struct ltq_dma_desc *desc_base; /* the descriptor base */
int phys; /* physical addr */ int phys; /* physical addr */
struct device *dev;
}; };
enum { enum {

4
arch/mips/lantiq/xway/dma.c
View File

@ -130,7 +130,7 @@ ltq_dma_alloc(struct ltq_dma_channel *ch)
unsigned long flags; unsigned long flags;
ch->desc = 0; ch->desc = 0;
ch->desc_base = dma_zalloc_coherent(NULL, ch->desc_base = dma_zalloc_coherent(ch->dev,
LTQ_DESC_NUM * LTQ_DESC_SIZE, LTQ_DESC_NUM * LTQ_DESC_SIZE,
&ch->phys, GFP_ATOMIC); &ch->phys, GFP_ATOMIC);
@ -182,7 +182,7 @@ ltq_dma_free(struct ltq_dma_channel *ch)
if (!ch->desc_base) if (!ch->desc_base)
return; return;
ltq_dma_close(ch); ltq_dma_close(ch);
dma_free_coherent(NULL, LTQ_DESC_NUM * LTQ_DESC_SIZE, dma_free_coherent(ch->dev, LTQ_DESC_NUM * LTQ_DESC_SIZE,
ch->desc_base, ch->phys); ch->desc_base, ch->phys);
} }
EXPORT_SYMBOL_GPL(ltq_dma_free); EXPORT_SYMBOL_GPL(ltq_dma_free);

1
drivers/net/ethernet/lantiq_etop.c
View File

@ -274,6 +274,7 @@ ltq_etop_hw_init(struct net_device *dev)
struct ltq_etop_chan *ch = &priv->ch[i]; struct ltq_etop_chan *ch = &priv->ch[i];
ch->idx = ch->dma.nr = i; ch->idx = ch->dma.nr = i;
ch->dma.dev = &priv->pdev->dev;
if (IS_TX(i)) { if (IS_TX(i)) {
ltq_dma_alloc_tx(&ch->dma); ltq_dma_alloc_tx(&ch->dma);