[PATCH 4/4] spi: cadence-quadspi: Assume device could match via platform

[Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>]

Driver has only of_device_id table, however it also has MODULE_ALIAS()
for platform name, thus assume there is a configuration where this can
be loaded outside of OF system.  In such case of_device_get_match_data()
will return NULL, which is already checked in one place of probe()
function but not in the other, leading to Smatch warning:

  drivers/spi/spi-cadence-quadspi.c:1942 cqspi_probe() error: we previously assumed 'ddata' could be null (see line 1885)

Driver should be consistent, so assume device can be matched via
platform bus and of_device_get_match_data() can indeed return NULL.
This is also possible with malformed DTS on OF-platform: no unit address
and device node name matching driver name.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
---
 drivers/spi/spi-cadence-quadspi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c
index 47477f2d9a25..e9197bf9d739 100644
--- a/drivers/spi/spi-cadence-quadspi.c
+++ b/drivers/spi/spi-cadence-quadspi.c
@@ -1939,7 +1939,7 @@ static int cqspi_probe(struct platform_device *pdev)
 
 	host->num_chipselect = cqspi->num_chipselect;
 
-	if (ddata->quirks & CQSPI_SUPPORT_DEVICE_RESET)
+	if (ddata && (ddata->quirks & CQSPI_SUPPORT_DEVICE_RESET))
 		cqspi_device_reset(cqspi);
 
 	if (cqspi->use_direct_mode) {
-- 
2.43.0