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Haotian Zhang 352e364a56 power: supply: bq27xxx: fix wrong errno when bus ops are unsupported
[ Upstream commit 688364a116 ]

bq27xxx_write(), bq27xxx_read_block(), and bq27xxx_write_block()
return -EPERM when the bus callback pointer is NULL. A NULL callback
indicates the operation is not supported by the bus/driver,
not that permission is denied.

Return -EOPNOTSUPP instead of -EPERM when di->bus.write/
read_bulk/write_bulk is NULL.

Fixes: 14073f6614 ("power: supply: bq27xxx: Add bulk transfer bus methods")
Signed-off-by: Haotian Zhang <vulab@iscas.ac.cn>
Reviewed-by: Matt Ranostay <matt@ranostay.sg>
Link: https://patch.msgid.link/20251204083436.1367-1-vulab@iscas.ac.cn
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2026-03-04 07:20:17 -05:00
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Linux kernel
============

There are several guides for kernel developers and users. These guides can
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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 reStructuredText 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.