From: Luc Van Oostenryck <luc.vanoostenr...@gmail.com>
[ Upstream commit bd72866b8da499e60633ff28f8a4f6e09ca78efe ]
These accessors must be used to read/write a big-endian bus. The value
returned or written is native-endian.
However, these accessors are defined using be{16,32}_to_cpu() or
cpu_to_be{16,32}() to make the endian conversion but these expect a
__be{16,32} when none is present. Keeping them would need a force cast
that would solve nothing at all.
So, do the conversion using swab{16,32}, like done in asm-generic for
similar situations.
Reported-by: kernel test robot <l...@intel.com>
Signed-off-by: Luc Van Oostenryck <luc.vanoostenr...@gmail.com>
Signed-off-by: Andrew Morton <a...@linux-foundation.org>
Cc: Richard Henderson <r...@twiddle.net>
Cc: Ivan Kokshaysky <i...@jurassic.park.msu.ru>
Cc: Matt Turner <matts...@gmail.com>
Cc: Stephen Boyd <sb...@kernel.org>
Cc: Arnd Bergmann <a...@arndb.de>
Link:
http://lkml.kernel.org/r/20200622114232.80039-1-luc.vanoostenr...@gmail.com
Signed-off-by: Linus Torvalds <torva...@linux-foundation.org>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
arch/alpha/include/asm/io.h | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/alpha/include/asm/io.h b/arch/alpha/include/asm/io.h
index b771bf1b53523..103270d5a9fc6 100644
--- a/arch/alpha/include/asm/io.h
+++ b/arch/alpha/include/asm/io.h
@@ -502,10 +502,10 @@ extern inline void writeq(u64 b, volatile void __iomem
*addr)
}
#endif
-#define ioread16be(p) be16_to_cpu(ioread16(p))
-#define ioread32be(p) be32_to_cpu(ioread32(p))
-#define iowrite16be(v,p) iowrite16(cpu_to_be16(v), (p))
-#define iowrite32be(v,p) iowrite32(cpu_to_be32(v), (p))
+#define ioread16be(p) swab16(ioread16(p))
+#define ioread32be(p) swab32(ioread32(p))
+#define iowrite16be(v,p) iowrite16(swab16(v), (p))
+#define iowrite32be(v,p) iowrite32(swab32(v), (p))
#define inb_p inb
#define inw_p inw
--
2.25.1
