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Peter Griffin 3ddca18534 scsi: ufs: exynos: Ensure consistent phy reference counts 
commit 7f05fd9a3b upstream.

ufshcd_link_startup() can call ufshcd_vops_link_startup_notify()
multiple times when retrying. This causes the phy reference count to
keep increasing and the phy to not properly re-initialize.

If the phy has already been previously powered on, first issue a
phy_power_off() and phy_exit(), before re-initializing and powering on
again.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Link: https://lore.kernel.org/r/20250319-exynos-ufs-stability-fixes-v2-4-96722cc2ba1b@linaro.org
Fixes: 3d73b200f9 ("scsi: ufs: ufs-exynos: Change ufs phy control sequence")
Cc: stable@vger.kernel.org
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2025-04-25 10:43:55 +02:00
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README

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.