[POWERPC] Change rheap functions to use ulongs instead of pointers

The rheap allocation functions return a pointer, but the actual value is based
on how the heap was initialized, and so it can be anything, e.g. an offset
into a buffer.  A ulong is a better representation of the value returned by
the allocation functions.

This patch changes all of the relevant rheap functions to use a unsigned long
integers instead of a pointer.  In case of an error, the value returned is
a negative error code that has been cast to an unsigned long.  The caller can
use the IS_ERR_VALUE() macro to check for this.

All code which calls the rheap functions is updated accordingly.  Macros
IS_MURAM_ERR() and IS_DPERR(), have been deleted in favor of IS_ERR_VALUE().

Also added error checking to rh_attach_region().

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 4 insertions, 9 deletions

diff --git a/include/asm-powerpc/qe.h b/include/asm-powerpc/qe.h
index a62168ec535f..9d304b1f1608 100644
--- a/include/asm-powerpc/qe.h
+++ b/include/asm-powerpc/qe.h
@@ -38,11 +38,11 @@ int qe_issue_cmd(u32 cmd, u32 device, u8 mcn_protocol, u32 cmd_input);
 void qe_setbrg(u32 brg, u32 rate);
 int qe_get_snum(void);
 void qe_put_snum(u8 snum);
-u32 qe_muram_alloc(u32 size, u32 align);
-int qe_muram_free(u32 offset);
-u32 qe_muram_alloc_fixed(u32 offset, u32 size);
+unsigned long qe_muram_alloc(int size, int align);
+int qe_muram_free(unsigned long offset);
+unsigned long qe_muram_alloc_fixed(unsigned long offset, int size);
 void qe_muram_dump(void);
-void *qe_muram_addr(u32 offset);
+void *qe_muram_addr(unsigned long offset);
 
 /* Buffer descriptors */
 struct qe_bd {
@@ -448,10 +448,5 @@ struct ucc_slow_pram {
 #define UCC_FAST_FUNCTION_CODE_DTB_LCL  0x02
 #define UCC_FAST_FUNCTION_CODE_BDB_LCL  0x01
 
-static inline long IS_MURAM_ERR(const u32 offset)
-{
-        return offset > (u32) - 1000L;
-}
-
 #endif /* __KERNEL__ */
 #endif /* _ASM_POWERPC_QE_H */