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| Filename | Latest commit message | Latest commit date |
|---|---|---|
0c106e57de
The for_each_child_of_node macro itself maintains the correct reference
count of the nodes so the explicit of_node_put() call causes a warning:
[ 0.098960] OF: ERROR: Bad of_node_put() on /pmc@7000e400/powergates/xusba
[ 0.098981] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.11.3 #1-NixOS
[ 0.098996] Hardware name: NVIDIA Jetson TX1 Developer Kit (DT)
[ 0.099011] Call trace:
[ 0.099034] [<ffff00000808a048>] dump_backtrace+0x0/0x2a0
[ 0.099051] [<ffff00000808a30c>] show_stack+0x24/0x30
[ 0.099069] [<ffff0000084a6494>] dump_stack+0x9c/0xc0
[ 0.099090] [<ffff000008992214>] of_node_release+0xa4/0xa8
[ 0.099107] [<ffff0000084a9270>] kobject_put+0x90/0x1f8
[ 0.099124] [<ffff0000089914ac>] of_node_put+0x24/0x30
[ 0.099140] [<ffff00000898cec4>] __of_get_next_child+0x4c/0x70
[ 0.099155] [<ffff00000898cf28>] of_get_next_child+0x40/0x68
[ 0.099173] [<ffff0000090a099c>] tegra_pmc_early_init+0x4e8/0x5ac
[ 0.099189] [<ffff00000808399c>] do_one_initcall+0x5c/0x168
[ 0.099206] [<ffff000009050c98>] kernel_init_freeable+0xd4/0x240
[ 0.099224] [<ffff000008b2d658>] kernel_init+0x18/0x108
[ 0.099238] [<ffff0000080836c0>] ret_from_fork+0x10/0x50
(It's not very apparent from the OF documentation that of_node_put() is
not needed; the macro itself has no docstring and of_get_next_child()
used in the implementation begins with "Returns a node pointer with
refcount incremented" but then only at the very end of the docstring
the crucial part "Decrements the refcount of prev" is mentioned.)
Fixes:
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.