[PATCH 2/2] Documentation: qat: clarify KPT enable device-state requirement

[nitesh.venkatesh@intel.com]

From: Nitesh Venkatesh <nitesh.venkatesh@intel.com>

The ABI description for /sys/bus/pci/devices/<BDF>/qat_kpt/enable did
not mention that the device must be in the down state before the KPT
enable attribute can be written. This requirement is enforced by the
driver for both enabling and disabling KPT, but was not reflected in
the ABI documentation, leaving users to discover it via -EINVAL.

Update the description to note that the device must be in the down
state before changing the KPT state.

Signed-off-by: Nitesh Venkatesh <nitesh.venkatesh@intel.com>
Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Reviewed-by: Ahsan Atta <ahsan.atta@intel.com>
---
 Documentation/ABI/testing/sysfs-driver-qat_kpt | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Documentation/ABI/testing/sysfs-driver-qat_kpt b/Documentation/ABI/testing/sysfs-driver-qat_kpt
index c6480ea1fa4f..80831ce3d2ca 100644
--- a/Documentation/ABI/testing/sysfs-driver-qat_kpt
+++ b/Documentation/ABI/testing/sysfs-driver-qat_kpt
@@ -14,7 +14,8 @@ Contact:	qat-linux@intel.com
 Description:
 		(RW) Enables or disables Key Protection Technology (KPT).
 
-		Write 1 to enable KPT, or 0 to disable it.
+		Write 1 to enable KPT, or 0 to disable it. The device must be
+		in the down state before changing the KPT state.
 
 		Example usage::
 
-- 
2.52.0