From: Arnd Bergmann <arnd@kernel.org>
To: "Alex Deucher" <alexander.deucher@amd.com>,
"Christian König" <christian.koenig@amd.com>,
"Pan, Xinhui" <Xinhui.Pan@amd.com>,
"David Airlie" <airlied@linux.ie>,
"Daniel Vetter" <daniel@ffwll.ch>
Cc: Arnd Bergmann <arnd@arndb.de>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
Evan Quan <evan.quan@amd.com>,
Hawking Zhang <Hawking.Zhang@amd.com>,
Huang Rui <ray.huang@amd.com>, shaoyunl <shaoyun.liu@amd.com>,
Andrey Grodzovsky <andrey.grodzovsky@amd.com>,
Jack Zhang <Jack.Zhang1@amd.com>,
amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
linux-kernel@vger.kernel.org, llvm@lists.linux.dev
Subject: [PATCH] drm/amdgpu: fix clang out-of-range warning
Date: Mon, 27 Sep 2021 14:19:45 +0200 [thread overview]
Message-ID: <20210927121958.941637-1-arnd@kernel.org> (raw)
From: Arnd Bergmann <arnd@arndb.de>
clang-14 points out that comparing an 'unsigned int' against a large
64-bit constantn is pointless:
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c:1206:18: error: result of comparison of constant 4294967296 with expression of type 'resource_size_t' (aka 'unsigned int') is always false [-Werror,-Wtautological-constant-out-of-range-compare]
res->start > 0x100000000ull)
Rephrase the comparison using the upper_32_bits() macro, which should
keep it legible while avoiding the warning.
Fixes: 31b8adab3247 ("drm/amdgpu: require a root bus window above 4GB for BAR resize")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index ab3794c42d36..741a55031ca1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1203,7 +1203,7 @@ int amdgpu_device_resize_fb_bar(struct amdgpu_device *adev)
pci_bus_for_each_resource(root, res, i) {
if (res && res->flags & (IORESOURCE_MEM | IORESOURCE_MEM_64) &&
- res->start > 0x100000000ull)
+ upper_32_bits(res->start) != 0)
break;
}
--
2.29.2
next reply other threads:[~2021-09-27 12:20 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-27 12:19 Arnd Bergmann [this message]
2021-09-27 12:26 ` [PATCH] drm/amdgpu: fix clang out-of-range warning Christian König
2021-09-28 9:56 ` Michel Dänzer
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210927121958.941637-1-arnd@kernel.org \
--to=arnd@kernel.org \
--cc=Hawking.Zhang@amd.com \
--cc=Jack.Zhang1@amd.com \
--cc=Xinhui.Pan@amd.com \
--cc=airlied@linux.ie \
--cc=alexander.deucher@amd.com \
--cc=amd-gfx@lists.freedesktop.org \
--cc=andrey.grodzovsky@amd.com \
--cc=arnd@arndb.de \
--cc=christian.koenig@amd.com \
--cc=daniel@ffwll.ch \
--cc=dri-devel@lists.freedesktop.org \
--cc=evan.quan@amd.com \
--cc=linux-kernel@vger.kernel.org \
--cc=llvm@lists.linux.dev \
--cc=nathan@kernel.org \
--cc=ndesaulniers@google.com \
--cc=ray.huang@amd.com \
--cc=shaoyun.liu@amd.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.