Commit 1b60fcdc authored by Ludovic Desroches's avatar Ludovic Desroches Committed by Greg Kroah-Hartman

dmaengine: at_xdmac: align descriptors on 64 bits

commit 4a9723e8 upstream.

Having descriptors aligned on 64 bits allows update CNDA and CUBC in an
atomic way.
Signed-off-by: default avatarLudovic Desroches <ludovic.desroches@atmel.com>
Fixes: e1f7c9ee ("dmaengine: at_xdmac: creation of the atmel
eXtended DMA Controller driver")
Reviewed-by: default avatarNicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ba1eebc7
......@@ -242,7 +242,7 @@ struct at_xdmac_lld {
u32 mbr_dus; /* Destination Microblock Stride Register */
};
/* 64-bit alignment needed to update CNDA and CUBC registers in an atomic way. */
struct at_xdmac_desc {
struct at_xdmac_lld lld;
enum dma_transfer_direction direction;
......@@ -253,7 +253,7 @@ struct at_xdmac_desc {
unsigned int xfer_size;
struct list_head descs_list;
struct list_head xfer_node;
};
} __aligned(sizeof(u64));
static inline void __iomem *at_xdmac_chan_reg_base(struct at_xdmac *atxdmac, unsigned int chan_nb)
{
......
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