HT7315_MonitorSOC/sdk/Driver/Usb/Gadget/inc/hv_drv_UsbErr.h

#ifndef _LINUX_ERR_H
#define _LINUX_ERR_H

#include "hv_drv_UsbCompat.h"


/*
 * Kernel pointers have redundant information, so we can use a
 * scheme where we can return either an error code or a dentry
 * pointer with the same return value.
 *
 * This should be a per-architecture thing, to allow different
 * error and pointer decisions.
 */
#define MAX_ERRNO           4095


#define IS_ERR_VALUE(x)     unlikely((x) >= (unsigned long)-MAX_ERRNO)

static inline void *ERR_PTR(long error)
{
    return (void *) error;
}

static inline long PTR_ERR(const void *ptr)
{
    return (long) ptr;
}

static inline long IS_ERR(const void *ptr)
{
    return IS_ERR_VALUE((unsigned long)ptr);
}

static inline bool IS_ERR_OR_NULL(const void *ptr)
{
    return !ptr || IS_ERR_VALUE((unsigned long)ptr);
}

/**
 * ERR_CAST - Explicitly cast an error-valued pointer to another pointer type
 * @ptr: The pointer to cast.
 *
 * Explicitly cast an error-valued pointer to another pointer type in such a
 * way as to make it clear that's what's going on.
 */
static inline void *  ERR_CAST(const void *ptr)
{
    /* cast away the const */
    return (void *) ptr;
}


#endif /* _LINUX_ERR_H */