Fall back to usual allocation method if DMA coherent allocation fails.

SPI framework will map and use DMA mapped memory when possible.

Signed-off-by: Andy Shevchenko <andriy.shevche...@linux.intel.com>
---
 drivers/staging/fbtft/fbtft-core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/fbtft/fbtft-core.c 
b/drivers/staging/fbtft/fbtft-core.c
index 226be8c09768..9f024986aff4 100644
--- a/drivers/staging/fbtft/fbtft-core.c
+++ b/drivers/staging/fbtft/fbtft-core.c
@@ -843,7 +843,8 @@ struct fb_info *fbtft_framebuffer_alloc(struct 
fbtft_display *display,
                if (dma) {
                        txbuf = dmam_alloc_coherent(dev, txbuflen,
                                                    &par->txbuf.dma, GFP_DMA);
-               } else
+               }
+               if (!txbuf)
 #endif
                {
                        txbuf = devm_kzalloc(par->info->device,
-- 
2.11.0

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