[PATCH] mtd: mtdchar: return expected errors on mmap() call

[Vladimir Zapolskiy]

According both to POSIX.1-2008 and Linux Programmer's Manual mmap()
syscall shouldn't return undocumented ENOSYS, this change replaces
the errno with more appropriate ENODEV and EACCESS.

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy at mentor.com>
Cc: David Woodhouse <David.Woodhouse at intel.com>
---
 drivers/mtd/mtdchar.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index 684bfa3..a4c026e 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -1099,7 +1099,7 @@ static unsigned long mtdchar_get_unmapped_area(struct file *file,
 		return (unsigned long) -EINVAL;
 
 	ret = mtd_get_unmapped_area(mtd, len, offset, flags);
-	return ret == -EOPNOTSUPP ? -ENOSYS : ret;
+	return ret == -EOPNOTSUPP ? -ENODEV : ret;
 }
 #endif
 
@@ -1124,9 +1124,9 @@ static int mtdchar_mmap(struct file *file, struct vm_area_struct *vma)
 #endif
 		return vm_iomap_memory(vma, map->phys, map->size);
 	}
-	return -ENOSYS;
+	return -ENODEV;
 #else
-	return vma->vm_flags & VM_SHARED ? 0 : -ENOSYS;
+	return vma->vm_flags & VM_SHARED ? 0 : -EACCES;
 #endif
 }
 
-- 
1.7.10.4