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-rw-r--r--Documentation/scsi/st.txt8
1 files changed, 5 insertions, 3 deletions
diff --git a/Documentation/scsi/st.txt b/Documentation/scsi/st.txt
index f346abbdd6ff..0d5bdb153d3b 100644
--- a/Documentation/scsi/st.txt
+++ b/Documentation/scsi/st.txt
@@ -506,9 +506,11 @@ user does not request data that far.)
DEBUGGING HINTS
-To enable debugging messages, edit st.c and #define DEBUG 1. As seen
-above, debugging can be switched off with an ioctl if debugging is
-compiled into the driver. The debugging output is not voluminous.
+Debugging code is now compiled in by default but debugging is turned off
+with the kernel module parameter debug_flag defaulting to 0. Debugging
+can still be switched on and off with an ioctl. To enable debug at
+module load time add debug_flag=1 to the module load options, the
+debugging output is not voluminous.
If the tape seems to hang, I would be very interested to hear where
the driver is waiting. With the command 'ps -l' you can see the state