[PATCH] dm flakey: add error_writes to documentation

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The "error_writes" optional feature parameter was added by commit
ef548c551e72 ("dm flakey: introduce "error_writes" feature"). Add
additional documentation detailing this parameter.

Signed-off-by: John Pittman <jpittman@xxxxxxxxxx>
---
 Documentation/device-mapper/dm-flakey.txt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/device-mapper/dm-flakey.txt b/Documentation/device-mapper/dm-flakey.txt
index c43030718cef..4eb4ffa6ba52 100644
--- a/Documentation/device-mapper/dm-flakey.txt
+++ b/Documentation/device-mapper/dm-flakey.txt
@@ -33,6 +33,11 @@ Optional feature parameters:
 	All write I/O is silently ignored.
 	Read I/O is handled correctly.
 
+  error_writes:
+	All write I/O is errored and dropped
+	Incompatible with drop_writes
+	Read I/O is handled correctly.
+
   corrupt_bio_byte <Nth_byte> <direction> <value> <flags>:
 	During <down interval>, replace <Nth_byte> of the data of
 	each matching bio with <value>.
-- 
2.17.1

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