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authorHauke Mehrtens <hauke@hauke-m.de>2018-09-09 22:26:23 +0300
committerDavid S. Miller <davem@davemloft.net>2018-09-12 09:33:19 +0300
commit2d946e5bcdabc1deef72d01bc92a2801c71d6d8d (patch)
tree604421402a13b43b4f246c69c9982192c766f6ea /arch
parent4ecdf770914392eb654d24f00e301d3e6afd1cfc (diff)
downloadlinux-2d946e5bcdabc1deef72d01bc92a2801c71d6d8d.tar.xz
MIPS: lantiq: dma: add dev pointer
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/mips/include/asm/mach-lantiq/xway/xway_dma.h1
-rw-r--r--arch/mips/lantiq/xway/dma.c4
2 files changed, 3 insertions, 2 deletions
diff --git a/arch/mips/include/asm/mach-lantiq/xway/xway_dma.h b/arch/mips/include/asm/mach-lantiq/xway/xway_dma.h
index 4901833498f7..8441b2698e64 100644
--- a/arch/mips/include/asm/mach-lantiq/xway/xway_dma.h
+++ b/arch/mips/include/asm/mach-lantiq/xway/xway_dma.h
@@ -40,6 +40,7 @@ struct ltq_dma_channel {
int desc; /* the current descriptor */
struct ltq_dma_desc *desc_base; /* the descriptor base */
int phys; /* physical addr */
+ struct device *dev;
};
enum {
diff --git a/arch/mips/lantiq/xway/dma.c b/arch/mips/lantiq/xway/dma.c
index 4b9fbb6744ad..664f2f7f55c1 100644
--- a/arch/mips/lantiq/xway/dma.c
+++ b/arch/mips/lantiq/xway/dma.c
@@ -130,7 +130,7 @@ ltq_dma_alloc(struct ltq_dma_channel *ch)
unsigned long flags;
ch->desc = 0;
- ch->desc_base = dma_zalloc_coherent(NULL,
+ ch->desc_base = dma_zalloc_coherent(ch->dev,
LTQ_DESC_NUM * LTQ_DESC_SIZE,
&ch->phys, GFP_ATOMIC);
@@ -182,7 +182,7 @@ ltq_dma_free(struct ltq_dma_channel *ch)
if (!ch->desc_base)
return;
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);
}
EXPORT_SYMBOL_GPL(ltq_dma_free);