From 2bec708a88ce053ffcb0dd8e373d1e46c6dc38a4 Mon Sep 17 00:00:00 2001 From: Laurence Oberman Date: Sun, 19 Oct 2014 09:44:25 -0400 Subject: st: add a debug_flag module parameter request This patch adds a debug_flag parameter that can be set on module load, and allows the DEBUG facility without a module recompile. Note that now DEBUG 1 is the default with this patch. Usage: modprobe st debug_flag=1 Signed-off-by: Laurence Oberman Acked-by: Kai M??kisara Signed-off-by: Christoph Hellwig --- Documentation/scsi/st.txt | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) (limited to 'Documentation/scsi') 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 -- cgit v1.2.3