From 4925c7e22293dbf2b85351e8c2323ad8282396b3 Mon Sep 17 00:00:00 2001 From: Michael Holzheu Date: Mon, 5 Mar 2007 23:35:47 +0100 Subject: [S390] tape: Compression overwrites crypto setting After switching compression on/off with the mt command, tape encryption is no longer working. The reason for that is, that the modeset_byte is set to the compression value instead of using bitwise and/or bit operations to enable/disable the corresponding bit. Signed-off-by: Michael Holzheu Signed-off-by: Martin Schwidefsky --- drivers/s390/char/tape_std.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/s390/char/tape_std.c b/drivers/s390/char/tape_std.c index 7a76ec413a3..2a1af4e60be 100644 --- a/drivers/s390/char/tape_std.c +++ b/drivers/s390/char/tape_std.c @@ -647,7 +647,10 @@ tape_std_mtcompression(struct tape_device *device, int mt_count) return PTR_ERR(request); request->op = TO_NOP; /* setup ccws */ - *device->modeset_byte = (mt_count == 0) ? 0x00 : 0x08; + if (mt_count == 0) + *device->modeset_byte &= ~0x08; + else + *device->modeset_byte |= 0x08; tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL); /* execute it */ -- cgit v1.2.3-70-g09d2