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d41bdccb3c
[ Upstream commit ac01df343e5a6c6bcead2ed421af1fde30f73e7e ] Usually, the vbus_regulator (smps10 on omap5evm) boots up disabled. Hence calling regulator_disable() indirectly through dwc3_omap_set_mailbox() during probe leads to: [ 10.332764] WARNING: CPU: 0 PID: 1628 at drivers/regulator/core.c:2853 _regulator_disable+0x40/0x164 [ 10.351919] unbalanced disables for smps10_out1 [ 10.361298] Modules linked in: dwc3_omap(+) clk_twl6040 at24 gpio_twl6040 palmas_gpadc palmas_pwrbutton industrialio snd_soc_omap_mcbsp(+) snd_soc_ti_sdma display_connector ti_tpd12s015 drm leds_gpio drm_panel_orientation_quirks ip_tables x_tables ipv6 autofs4 [ 10.387818] CPU: 0 PID: 1628 Comm: systemd-udevd Not tainted 5.17.0-rc1-letux-lpae+ #8139 [ 10.405129] Hardware name: Generic OMAP5 (Flattened Device Tree) [ 10.411455] unwind_backtrace from show_stack+0x10/0x14 [ 10.416970] show_stack from dump_stack_lvl+0x40/0x4c [ 10.422313] dump_stack_lvl from __warn+0xb8/0x170 [ 10.427377] __warn from warn_slowpath_fmt+0x70/0x9c [ 10.432595] warn_slowpath_fmt from _regulator_disable+0x40/0x164 [ 10.439037] _regulator_disable from regulator_disable+0x30/0x64 [ 10.445382] regulator_disable from dwc3_omap_set_mailbox+0x8c/0xf0 [dwc3_omap] [ 10.453116] dwc3_omap_set_mailbox [dwc3_omap] from dwc3_omap_probe+0x2b8/0x394 [dwc3_omap] [ 10.467021] dwc3_omap_probe [dwc3_omap] from platform_probe+0x58/0xa8 [ 10.481762] platform_probe from really_probe+0x168/0x2fc [ 10.481782] really_probe from __driver_probe_device+0xc4/0xd8 [ 10.481782] __driver_probe_device from driver_probe_device+0x24/0xa4 [ 10.503762] driver_probe_device from __driver_attach+0xc4/0xd8 [ 10.510018] __driver_attach from bus_for_each_dev+0x64/0xa0 [ 10.516001] bus_for_each_dev from bus_add_driver+0x148/0x1a4 [ 10.524880] bus_add_driver from driver_register+0xb4/0xf8 [ 10.530678] driver_register from do_one_initcall+0x90/0x1c4 [ 10.536661] do_one_initcall from do_init_module+0x4c/0x200 [ 10.536683] do_init_module from load_module+0x13dc/0x1910 [ 10.551159] load_module from sys_finit_module+0xc8/0xd8 [ 10.561319] sys_finit_module from __sys_trace_return+0x0/0x18 [ 10.561336] Exception stack(0xc344bfa8 to 0xc344bff0) [ 10.561341] bfa0: b6fb5778 b6fab8d8 00000007 b6ecfbb8 00000000 b6ed0398 [ 10.561341] bfc0: b6fb5778 b6fab8d8 855c0500 0000017b 00020000 b6f9a3cc 00000000 b6fb5778 [ 10.595500] bfe0: bede18f8 bede18e8 b6ec9aeb b6dda1c2 [ 10.601345] ---[ end trace 0000000000000000 ]--- Fix this unnecessary warning by checking if the regulator is enabled. Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com> Link: https://lore.kernel.org/r/af3b750dc2265d875deaabcf5f80098c9645da45.1646744616.git.hns@goldelico.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.