[PATCH] memory: omap-gpmc: fix wait pin validation

[B. Niedermayr]

From: Benedikt Niedermayr <benedikt.niedermayr@xxxxxxxxxxx>

This bug has been introduced after switching from -1 to UINT_MAX
for GPMC_WAITPIN_INVALID.

The bug leads to an error when the optional gpmc,wait-pin
dt-property is not used:

...
gpmc_cs_program_settings: invalid wait-pin (-1)
...

Signed-off-by: Benedikt Niedermayr <benedikt.niedermayr@xxxxxxxxxxx>
Fixes: 8dd7e4af5853 ("memory: omap-gpmc: fix coverity issue "Control flow issues"")
Cc: Rob Herring <robh+dt@xxxxxxxxxx>
---
 drivers/memory/omap-gpmc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/memory/omap-gpmc.c b/drivers/memory/omap-gpmc.c
index 57d9f91fe89b..d78f73db37c8 100644
--- a/drivers/memory/omap-gpmc.c
+++ b/drivers/memory/omap-gpmc.c
@@ -1918,7 +1918,8 @@ int gpmc_cs_program_settings(int cs, struct gpmc_settings *p)
 		}
 	}
 
-	if (p->wait_pin > gpmc_nr_waitpins) {
+	if (p->wait_pin != GPMC_WAITPIN_INVALID &&
+	    p->wait_pin > gpmc_nr_waitpins) {
 		pr_err("%s: invalid wait-pin (%d)\n", __func__, p->wait_pin);
 		return -EINVAL;
 	}
-- 
2.25.1