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| author | Michael Holzheu <holzheu@de.ibm.com> | 2007-03-05 23:35:47 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2007-03-05 23:35:47 +0100 |
| commit | 4925c7e22293dbf2b85351e8c2323ad8282396b3 (patch) | |
| tree | fa89ef269630ce6e5cb928ce7e681f2bd55d327b /drivers/s390 | |
| parent | 9c9c17613a78545a4a93b1370924f62eb282c903 (diff) | |
| download | linux-4925c7e22293dbf2b85351e8c2323ad8282396b3.tar.bz2 | |
[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 <holzheu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/char/tape_std.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/s390/char/tape_std.c b/drivers/s390/char/tape_std.c index 7a76ec413a3a..2a1af4e60be0 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 */ |