spi: fsl-spi: fix devm_ioremap_resource() error case

devm_ioremap_resource() doesn't return NULL but an ERR_PTR on error.

Reported-by: Jonas Gorsky <jogo@openwrt.org>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/spi/spi-fsl-cpm.c b/drivers/spi/spi-fsl-cpm.c
index 6f466ab1201a..896add8cfd3b 100644
--- a/drivers/spi/spi-fsl-cpm.c
+++ b/drivers/spi/spi-fsl-cpm.c
@@ -310,10 +310,15 @@ int fsl_spi_cpm_init(struct mpc8xxx_spi *mspi)
 
         if (mspi->flags & SPI_CPM1) {
                 struct resource *res;
+                void *pram;
 
                 res = platform_get_resource(to_platform_device(dev),
                                             IORESOURCE_MEM, 1);
-                mspi->pram = devm_ioremap_resource(dev, res);
+                pram = devm_ioremap_resource(dev, res);
+                if (IS_ERR(pram))
+                        mspi->pram = NULL;
+                else
+                        mspi->pram = pram;
         } else {
                 unsigned long pram_ofs = fsl_spi_cpm_get_pram(mspi);