[PATCH v2 1/3] mtd: rawnand: cadence: support deferred prob when DMA is not ready

[niravkumar.l.rabara at intel.com]

From: Niravkumar L Rabara <niravkumar.l.rabara at intel.com>

Use deferred driver probe in case the DMA driver is not probed.
When ARM SMMU is enabled, all peripheral device drivers, including NAND,
are probed earlier than the DMA driver.

Fixes: ec4ba01e894d ("mtd: rawnand: Add new Cadence NAND driver to MTD subsystem")
Cc: stable at vger.kernel.org
Signed-off-by: Niravkumar L Rabara <niravkumar.l.rabara at intel.com>
---
 drivers/mtd/nand/raw/cadence-nand-controller.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/raw/cadence-nand-controller.c b/drivers/mtd/nand/raw/cadence-nand-controller.c
index 8d1d710e439d..5e27f5546f1b 100644
--- a/drivers/mtd/nand/raw/cadence-nand-controller.c
+++ b/drivers/mtd/nand/raw/cadence-nand-controller.c
@@ -2908,7 +2908,7 @@ static int cadence_nand_init(struct cdns_nand_ctrl *cdns_ctrl)
 		if (!cdns_ctrl->dmac) {
 			dev_err(cdns_ctrl->dev,
 				"Unable to get a DMA channel\n");
-			ret = -EBUSY;
+			ret = -EPROBE_DEFER;
 			goto disable_irq;
 		}
 	}
-- 
2.25.1