spi: mpc512x-psc: fix compiler warning about uninitialized variable
This fixes several warnings like:
drivers/spi/spi-mpc512x-psc.c: In function 'mpc512x_psc_spi_prep_xfer_hw':
arch/powerpc/include/asm/io.h:163:2: warning: '__ret' may be used uninitialized in this function [-Wmaybe-uninitialized]
introduced in commit 8bf960985dfc for some build configurations.
Fixes: 8bf960985dfc ("spi: mpc512x-psc: add support for Freescale MPC5125")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/drivers/spi/spi-mpc512x-psc.c b/drivers/spi/spi-mpc512x-psc.c
index 280794d..1e75341 100644
--- a/drivers/spi/spi-mpc512x-psc.c
+++ b/drivers/spi/spi-mpc512x-psc.c
@@ -40,8 +40,8 @@
* MPC5121 (which uses a struct mpc52xx_psc) and MPC5125 (using mpc5125_psc).
*/
#define psc_addr(mps, regname) ({ \
- void *__ret; \
- switch(mps->type) { \
+ void *__ret = NULL; \
+ switch (mps->type) { \
case TYPE_MPC5121: { \
struct mpc52xx_psc __iomem *psc = mps->psc; \
__ret = &psc->regname; \