[ Upstream commit d8207c155a7c6015eb7f43739baa7dfb1fa638af ]
If probing the LP885x backlight fails after the regulators have been
enabled, then the following warning is seen when releasing the
regulators ...
WARNING: CPU: 1 PID: 289 at drivers/regulator/core.c:2051 _regulator_put.part.28+0x158/0x160
Modules linked in: tegra_xudc lp855x_bl(+) host1x pwm_tegra ip_tables x_tables ipv6 nf_defrag_ipv6
CPU: 1 PID: 289 Comm: systemd-udevd Not tainted 5.6.0-rc2-next-20200224 #1
Hardware name: NVIDIA Jetson TX1 Developer Kit (DT)
...
Call trace:
_regulator_put.part.28+0x158/0x160
regulator_put+0x34/0x50
devm_regulator_release+0x10/0x18
release_nodes+0x12c/0x230
devres_release_all+0x34/0x50
really_probe+0x1c0/0x370
driver_probe_device+0x58/0x100
device_driver_attach+0x6c/0x78
__driver_attach+0xb0/0xf0
bus_for_each_dev+0x68/0xc8
driver_attach+0x20/0x28
bus_add_driver+0x160/0x1f0
driver_register+0x60/0x110
i2c_register_driver+0x40/0x80
lp855x_driver_init+0x20/0x1000 [lp855x_bl]
do_one_initcall+0x58/0x1a0
do_init_module+0x54/0x1d0
load_module+0x1d80/0x21c8
__do_sys_finit_module+0xe8/0x100
__arm64_sys_finit_module+0x18/0x20
el0_svc_common.constprop.3+0xb0/0x168
do_el0_svc+0x20/0x98
el0_sync_handler+0xf4/0x1b0
el0_sync+0x140/0x180
Fix this by ensuring that the regulators are disabled, if enabled, on
probe failure.
Finally, ensure that the vddio regulator is disabled in the driver
remove handler.
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
commit 18722d48a6bb9c2e8d046214c0a5fd19d0a7c9f6 upstream.
Some memory is vmalloc'ed in the 'w100fb_save_vidmem' function and freed in
the 'w100fb_restore_vidmem' function. (these functions are called
respectively from the 'suspend' and the 'resume' functions)
However, it is also freed in the 'remove' function.
In order to avoid a potential double free, set the corresponding pointer
to NULL once freed in the 'w100fb_restore_vidmem' function.
Fixes: aac51f09d96a ("[PATCH] w100fb: Rewrite for platform independence")
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Antonino Daplas <adaplas@pol.net>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: <stable@vger.kernel.org> # v2.6.14+
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200506181902.193290-1-christophe.jaillet@wanadoo.fr
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 1c49f35e9e9156273124a0cfd38b57f7a7d4828f upstream.
Fix following warning:
vt8500lcdfb.c: In function 'vt8500lcd_blank':
vt8500lcdfb.c:229:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
if (info->fix.visual == FB_VISUAL_PSEUDOCOLOR ||
^
vt8500lcdfb.c:233:2: note: here
case FB_BLANK_UNBLANK:
^~~~
Adding a simple "fallthrough;" fixed the warning.
The fix was build tested.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reported-by: kbuild test robot <lkp@intel.com>
Fixes: e41f1a989408 ("fbdev: Implement simple blanking in pseudocolor modes for vt8500lcdfb")
Cc: Alexey Charkov <alchark@gmail.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: <stable@vger.kernel.org> # v2.6.38+
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200412202143.GA26948@ravnborg.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 93166f5f2e4dc593cff8ca77ef828ac6f148b0f3 upstream.
Clang warns:
../drivers/video/fbdev/core/fbmem.c:665:3: warning: misleading
indentation; statement is not part of the previous 'else'
[-Wmisleading-indentation]
if (fb_logo.depth > 4 && depth > 4) {
^
../drivers/video/fbdev/core/fbmem.c:661:2: note: previous statement is
here
else
^
../drivers/video/fbdev/core/fbmem.c:1075:3: warning: misleading
indentation; statement is not part of the previous 'if'
[-Wmisleading-indentation]
return ret;
^
../drivers/video/fbdev/core/fbmem.c:1072:2: note: previous statement is
here
if (!ret)
^
2 warnings generated.
This warning occurs because there are spaces before the tabs on these
lines. Normalize the indentation in these functions so that it is
consistent with the Linux kernel coding style and clang no longer warns.
Fixes: 1692b37c99d5 ("fbdev: Fix logo if logo depth is less than framebuffer depth")
Link: https://github.com/ClangBuiltLinux/linux/issues/825
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191218030025.10064-1-natechancellor@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit d3d19d6fc5736a798b118971935ce274f7deaa82 upstream.
The "fix" struct has a 2 byte hole after ->ywrapstep and the
"fix = info->fix;" assignment doesn't necessarily clear it. It depends
on the compiler. The solution is just to replace the assignment with an
memcpy().
Fixes: 1f5e31d7e55a ("fbmem: don't call copy_from/to_user() with mutex held")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Andrea Righi <righi.andrea@gmail.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Peter Rosin <peda@axentia.se>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200113100132.ixpaymordi24n3av@kili.mountain
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jon Hunter