linux-kernel - [PATCH] powerpc/476: Fix sparse report

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Date:   Sat, 18 Sep 2021 11:22:32 +0200
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     Christophe Leroy <christophe.leroy@...roup.eu>,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        kernel test robot <lkp@...el.com>,
        Alistair Popple <alistair@...ple.id.au>
Subject: [PATCH] powerpc/476: Fix sparse report

	arch/powerpc/platforms/44x/ppc476.c:236:17: warning: cast removes address space '__iomem' of expression
	arch/powerpc/platforms/44x/ppc476.c:241:34: warning: incorrect type in argument 1 (different address spaces)
	arch/powerpc/platforms/44x/ppc476.c:241:34:    expected void const volatile [noderef] __iomem *addr
	arch/powerpc/platforms/44x/ppc476.c:241:34:    got unsigned char [usertype] *
	arch/powerpc/platforms/44x/ppc476.c:243:17: warning: incorrect type in argument 1 (different address spaces)
	arch/powerpc/platforms/44x/ppc476.c:243:17:    expected void volatile [noderef] __iomem *addr
	arch/powerpc/platforms/44x/ppc476.c:243:17:    got unsigned char [usertype] *[assigned] fpga

Mark 'fpga' pointer as __iomem.

Reported-by: kernel test robot <lkp@...el.com>
Fixes: ab9a4183fddf ("powerpc: Update currituck pci/usb fixup for new board revision")
Cc: Alistair Popple <alistair@...ple.id.au>
Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 arch/powerpc/platforms/44x/ppc476.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/platforms/44x/ppc476.c b/arch/powerpc/platforms/44x/ppc476.c
index 07f7e3ce67b5..fb7db5cedd4e 100644
--- a/arch/powerpc/platforms/44x/ppc476.c
+++ b/arch/powerpc/platforms/44x/ppc476.c
@@ -219,7 +219,7 @@ static int board_rev = -1;
 static int __init ppc47x_get_board_rev(void)
 {
 	int reg;
-	u8 *fpga;
+	u8 __iomem *fpga;
 	struct device_node *np = NULL;
 
 	if (of_machine_is_compatible("ibm,currituck")) {
@@ -233,7 +233,7 @@ static int __init ppc47x_get_board_rev(void)
 	if (!np)
 		goto fail;
 
-	fpga = (u8 *) of_iomap(np, 0);
+	fpga = of_iomap(np, 0);
 	of_node_put(np);
 	if (!fpga)
 		goto fail;
-- 
2.31.1