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]
Message-ID: <20231029225916.791798-1-sashal@kernel.org>
Date:   Sun, 29 Oct 2023 18:58:36 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Arnd Bergmann <arnd@...db.de>, Baoquan He <bhe@...hat.com>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Helge Deller <deller@....de>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        Sasha Levin <sashal@...nel.org>, javierm@...hat.com,
        sam@...nborg.org, xu.panda@....com.cn, steve@....org,
        schnelle@...ux.ibm.com
Subject: [PATCH AUTOSEL 5.15 01/28] fbdev: atyfb: only use ioremap_uc() on i386 and ia64

From: Arnd Bergmann <arnd@...db.de>

[ Upstream commit c1a8d1d0edb71dec15c9649cb56866c71c1ecd9e ]

ioremap_uc() is only meaningful on old x86-32 systems with the PAT
extension, and on ia64 with its slightly unconventional ioremap()
behavior, everywhere else this is the same as ioremap() anyway.

Change the only driver that still references ioremap_uc() to only do so
on x86-32/ia64 in order to allow removing that interface at some
point in the future for the other architectures.

On some architectures, ioremap_uc() just returns NULL, changing
the driver to call ioremap() means that they now have a chance
of working correctly.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Baoquan He <bhe@...hat.com>
Reviewed-by: Luis Chamberlain <mcgrof@...nel.org>
Cc: Helge Deller <deller@....de>
Cc: Thomas Zimmermann <tzimmermann@...e.de>
Cc: Christophe Leroy <christophe.leroy@...roup.eu>
Cc: linux-fbdev@...r.kernel.org
Cc: dri-devel@...ts.freedesktop.org
Signed-off-by: Helge Deller <deller@....de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/video/fbdev/aty/atyfb_base.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/video/fbdev/aty/atyfb_base.c b/drivers/video/fbdev/aty/atyfb_base.c
index 1aef3d6ebd880..246bf67b32ea0 100644
--- a/drivers/video/fbdev/aty/atyfb_base.c
+++ b/drivers/video/fbdev/aty/atyfb_base.c
@@ -3447,11 +3447,15 @@ static int atyfb_setup_generic(struct pci_dev *pdev, struct fb_info *info,
 	}
 
 	info->fix.mmio_start = raddr;
+#if defined(__i386__) || defined(__ia64__)
 	/*
 	 * By using strong UC we force the MTRR to never have an
 	 * effect on the MMIO region on both non-PAT and PAT systems.
 	 */
 	par->ati_regbase = ioremap_uc(info->fix.mmio_start, 0x1000);
+#else
+	par->ati_regbase = ioremap(info->fix.mmio_start, 0x1000);
+#endif
 	if (par->ati_regbase == NULL)
 		return -ENOMEM;
 
-- 
2.42.0

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ