linux-kernel - [PATCH 1/1] platform/x86: apple-gmux: don't use be32_to_cpu and cpu_to

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 14 Jun 2023 16:49:32 +1000
From:   Orlando Chamberlain <orlandoch.dev@...il.com>
To:     Hans de Goede <hdegoede@...hat.com>
Cc:     Mark Gross <markgross@...nel.org>,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        Orlando Chamberlain <orlandoch.dev@...il.com>,
        kernel test robot <lkp@...el.com>
Subject: [PATCH 1/1] platform/x86: apple-gmux: don't use be32_to_cpu and cpu_to_be32

Sparce doesn't seem to like using be32_to_cpu and cpu_to_be32 to convert
values for the MMIO gmux to/from the host architecture.

Instead use iowrite32be and ioread32be to always convert, which should be
fine because apple-gmux is only used on x86 with is always little endian.

Reported-by: kernel test robot <lkp@...el.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202305161712.5l3f4iI4-lkp@intel.com/
Signed-off-by: Orlando Chamberlain <orlandoch.dev@...il.com>
---
 drivers/platform/x86/apple-gmux.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/apple-gmux.c b/drivers/platform/x86/apple-gmux.c
index e02b4aea4f1e..cadbb557a108 100644
--- a/drivers/platform/x86/apple-gmux.c
+++ b/drivers/platform/x86/apple-gmux.c
@@ -278,7 +278,7 @@ static u32 gmux_mmio_read32(struct apple_gmux_data *gmux_data, int port)
 	iowrite8(GMUX_MMIO_READ | sizeof(val),
 		gmux_data->iomem_base + GMUX_MMIO_COMMAND_SEND);
 	gmux_mmio_wait(gmux_data);
-	val = be32_to_cpu(ioread32(gmux_data->iomem_base));
+	val = ioread32be(gmux_data->iomem_base);
 	mutex_unlock(&gmux_data->index_lock);
 
 	return val;
@@ -288,7 +288,7 @@ static void gmux_mmio_write32(struct apple_gmux_data *gmux_data, int port,
 			       u32 val)
 {
 	mutex_lock(&gmux_data->index_lock);
-	iowrite32(cpu_to_be32(val), gmux_data->iomem_base);
+	iowrite32be(val, gmux_data->iomem_base);
 	iowrite8(port & 0xff, gmux_data->iomem_base + GMUX_MMIO_PORT_SELECT);
 	iowrite8(GMUX_MMIO_WRITE | sizeof(val),
 		gmux_data->iomem_base + GMUX_MMIO_COMMAND_SEND);
-- 
2.41.0