Fix gpmc_cs_reserved() so it returns 0 if the chip select
is available (not reserved) or an error otherwise.
This allows to use the return value directly and return a proper error code.
Signed-off-by: Ezequiel Garcia <ezequiel.gar...@free-electrons.com>
---
arch/arm/mach-omap2/gpmc.c | 12 ++++++++----
1 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index bd3bc93..604c1eb 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -452,12 +452,16 @@ static int gpmc_cs_set_reserved(int cs, int reserved)
return 0;
}
+/* Returns 0 if CS is available (not reseverd) or an error otherwise */
static int gpmc_cs_reserved(int cs)
{
if (cs > GPMC_CS_NUM)
return -ENODEV;
- return gpmc_cs_map & (1 << cs);
+ if (gpmc_cs_map & (1 << cs))
+ return -EBUSY;
+
+ return 0;
}
static unsigned long gpmc_mem_align(unsigned long size)
@@ -516,10 +520,10 @@ int gpmc_cs_request(int cs, unsigned long size, unsigned
long *base)
return -ENOMEM;
spin_lock(&gpmc_mem_lock);
- if (gpmc_cs_reserved(cs)) {
- r = -EBUSY;
+ r = gpmc_cs_reserved(cs);
+ if (r < 0)
goto out;
- }
+
if (gpmc_cs_mem_enabled(cs))
r = adjust_resource(res, res->start & ~(size - 1), size);
if (r < 0)
--
1.7.8.6
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