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-rw-r--r--Documentation/driver-api/firmware/firmware-usage-guidelines.rst5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/driver-api/firmware/firmware-usage-guidelines.rst b/Documentation/driver-api/firmware/firmware-usage-guidelines.rst
index fdcfce42c6d2..336e912281c3 100644
--- a/Documentation/driver-api/firmware/firmware-usage-guidelines.rst
+++ b/Documentation/driver-api/firmware/firmware-usage-guidelines.rst
@@ -42,3 +42,8 @@ then of course these rules will not apply strictly.)
deprecating old major versions, then this should only be done as a
last option, and be stated clearly in all communications.
+* Firmware files that affect the User API (UAPI) shall not introduce
+ changes that break existing userspace programs. Updates to such firmware
+ must ensure backward compatibility with existing userspace applications.
+ This includes maintaining consistent interfaces and behaviors that
+ userspace programs rely on.