[PATCH v6 1/3] sparc: explicitly set PCI_IOBASE to 0

Niklas Schnelle
2021-05-10T14:54:20Z

Instead of relying on the fallback in asm-generic/io.h which sets
PCI_IOBASE 0 if it is not defined set it explicitly.

Link: https://lore.kernel.org/lkml/CAK8P3a3PK9zyeP4ymELtc2ZYnymECoACiigw9Za+pvSJpCk5=g@mail.gmail.com/
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
---
arch/sparc/include/asm/io.h | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/arch/sparc/include/asm/io.h b/arch/sparc/include/asm/io.h
index 2eefa526b38f..c019e50702c1 100644
--- a/arch/sparc/include/asm/io.h
+++ b/arch/sparc/include/asm/io.h
@@ -1,6 +1,14 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef ___ASM_SPARC_IO_H
#define ___ASM_SPARC_IO_H
+
+/*
+ * On LEON PCI addresses below 64k are converted to IO accesses.
+ * io_remap_xxx() returns a kernel virtual address in the PCI window so
+ * inb() doesn't need to add an offset.
+ */
+#define PCI_IOBASE ((void __iomem *)0)
+
#if defined(__sparc__) && defined(__arch64__)
#include <asm/io_64.h>
#else
--
2.25.1