4.19-stable review patch. If anyone has any objections, please let me know.
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From: Lucas Stach l.stach@pengutronix.de
[ Upstream commit 58979ad6330a70450ed78837be3095107d022ea9 ]
The dma sync operation needs to be done with DMA_BIDIRECTIONAL when the BO is prepared for both read and write operations.
Fixes: a8c21a5451d8 ("drm/etnaviv: add initial etnaviv DRM driver") Signed-off-by: Lucas Stach l.stach@pengutronix.de Reviewed-by: Philipp Zabel p.zabel@pengutronix.de Reviewed-by: Christian Gmeiner cgmeiner@igalia.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/etnaviv/etnaviv_gem.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem.c b/drivers/gpu/drm/etnaviv/etnaviv_gem.c index 1fa74226db91f..69f91662ba236 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gem.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem.c @@ -370,9 +370,11 @@ static void *etnaviv_gem_vmap_impl(struct etnaviv_gem_object *obj)
static inline enum dma_data_direction etnaviv_op_to_dma_dir(u32 op) { - if (op & ETNA_PREP_READ) + op &= ETNA_PREP_READ | ETNA_PREP_WRITE; + + if (op == ETNA_PREP_READ) return DMA_FROM_DEVICE; - else if (op & ETNA_PREP_WRITE) + else if (op == ETNA_PREP_WRITE) return DMA_TO_DEVICE; else return DMA_BIDIRECTIONAL;