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Documentation: firmware: Clarify firmware path usage

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Newline characters will be taken into account for the firmware search
path parameter, warn users about that and provide an example using 'echo
-n' such that it clarifies the typical use of that parameter.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20230402135423.3235-1-f.fainelli@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Florian Fainelli 2023-04-02 06:54:14 -07:00 committed by Jonathan Corbet
parent 7332f9e45d
commit b645fc696b
1 changed files with 7 additions and 2 deletions
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9
Documentation/driver-api/firmware/fw_search_path.rst
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@ -22,5 +22,10 @@ can use the file:
* /sys/module/firmware_class/parameters/path
You would echo into it your custom path and firmware requested will be
searched for there first.
You would echo into it your custom path and firmware requested will be searched
for there first. Be aware that newline characters will be taken into account
and may not produce the intended effects. For instance you might want to use:
echo -n /path/to/script > /sys/module/firmware_class/parameters/path
to ensure that your script is being used.