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Wentao Liang 6ccb3bbdad gpio: stmpe: Check return value of stmpe_reg_read in stmpe_gpio_irq_sync_unlock 
commit b9644fbfbc upstream.

The stmpe_reg_read function can fail, but its return value is not checked
in stmpe_gpio_irq_sync_unlock. This can lead to silent failures and
incorrect behavior if the hardware access fails.

This patch adds checks for the return value of stmpe_reg_read. If the
function fails, an error message is logged and the function returns
early to avoid further issues.

Fixes: b888fb6f2a ("gpio: stmpe: i2c transfer are forbiden in atomic context")
Cc: stable@vger.kernel.org # 4.16+
Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
Link: https://lore.kernel.org/r/20250212021849.275-1-vulab@iscas.ac.cn
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2025-02-21 14:01:36 +01:00
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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 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.