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This would be useful to check if a device is not probing because it's waiting for a supplier to be added and then linked to before it can probe. To reduce sysfs clutter, this file is added only if it can ever be 1. So, if fw_devlink is disabled or set to permissive, this file is not added. Also, this file is removed once the device probes as it's no longer relevant. Signed-off-by: Saravana Kannan <saravanak@google.com> Link: https://lore.kernel.org/r/20200521191800.136035-4-saravanak@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
18 lines
793 B
Plaintext
18 lines
793 B
Plaintext
What: /sys/devices/.../waiting_for_supplier
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Date: May 2020
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Contact: Saravana Kannan <saravanak@google.com>
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Description:
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The /sys/devices/.../waiting_for_supplier attribute is only
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present when fw_devlink kernel command line option is enabled
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and is set to something stricter than "permissive". It is
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removed once a device probes successfully (because the
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information is no longer relevant). The number read from it (0
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or 1) reflects whether the device is waiting for one or more
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suppliers to be added and then linked to using device links
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before the device can probe.
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A value of 0 means the device is not waiting for any suppliers
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to be added before it can probe. A value of 1 means the device
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is waiting for one or more suppliers to be added before it can
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probe.
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