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UFS 3.1 specification mentions that the WriteBooster flags listed below
will be set to their default values, i.e. disabled, after power cycle or
any type of reset event. Thus we need to reset the flag variables kept in
struct hba to align with the device status and ensure that
WriteBooster-related functions are configured properly after device reset.
Without this fix, WriteBooster will not be enabled successfully after by
ufshcd_wb_ctrl() after device reset because hba->wb_enabled remains true.
Flags required to be reset to default values:
- fWriteBoosterEn: hba->wb_enabled
- fWriteBoosterBufferFlushEn: hba->wb_buf_flush_enabled
- fWriteBoosterBufferFlushDuringHibernate: No variable mapped
Link: https://lore.kernel.org/r/20201208135635.15326-2-stanley.chu@mediatek.com
Fixes:
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
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| samples | ||
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| virt | ||
| .clang-format | ||
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| 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.