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| Filename | Latest commit message | Latest commit date |
|---|---|---|
7b3b119649
commit 5c34c0aef185dcd10881847b9ebf20046aa77cb4 upstream.
bq27xxx_battery_update() assumes / requires that it is only run once,
not multiple times at the same time. But there are 3 possible callers:
1. bq27xxx_battery_poll() delayed_work item handler
2. bq27xxx_battery_irq_handler_thread() I2C IRQ handler
3. bq27xxx_battery_setup()
And there is no protection against these racing with each other,
fix this race condition by making all callers take di->lock:
- Rename bq27xxx_battery_update() to bq27xxx_battery_update_unlocked()
- Add new bq27xxx_battery_update() which takes di->lock and then calls
bq27xxx_battery_update_unlocked()
- Make stale cache check code in bq27xxx_battery_get_property(), which
already takes di->lock directly to check the jiffies, call
bq27xxx_battery_update_unlocked() instead of messing with
the delayed_work item
- Make bq27xxx_battery_update_unlocked() mod the delayed-work item
so that the next poll is delayed to poll_interval milliseconds after
the last update independent of the source of the update
Fixes:
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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.