From ef070b4e4aa25bb5f8632ad196644026c11903bf Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Tue, 19 Feb 2019 23:21:28 +0300
Subject: [PATCH] spi: pxa2xx: Setup maximum supported DMA transfer length
Git-commit: ef070b4e4aa25bb5f8632ad196644026c11903bf
Patch-mainline: v5.1-rc1
References: bsc#1051510

When the commit b6ced294fb61

   ("spi: pxa2xx: Switch to SPI core DMA mapping functionality")

switches to SPI core provided DMA helpers, it missed to setup maximum
supported DMA transfer length for the controller and thus users
mistakenly try to send more data than supported with the following
Warning: 

  ili9341 spi-PRP0001:01: DMA disabled for transfer length 153600 greater than 65536

Setup maximum supported DMA transfer length in order to make users know
the limit.

Fixes: b6ced294fb61 ("spi: pxa2xx: Switch to SPI core DMA mapping functionality")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/spi/spi-pxa2xx.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c
index d84b893a64d7..3e82eaad0f2d 100644
--- a/drivers/spi/spi-pxa2xx.c
+++ b/drivers/spi/spi-pxa2xx.c
@@ -1696,6 +1696,7 @@ static int pxa2xx_spi_probe(struct platform_device *pdev)
 			platform_info->enable_dma = false;
 		} else {
 			master->can_dma = pxa2xx_spi_can_dma;
+			master->max_dma_len = MAX_DMA_LEN;
 		}
 	}
 
-- 
2.16.4