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| * | [SK_BUFF]: Introduce ipv6_hdr(), remove skb->nh.ipv6hArnaldo Carvalho de Melo2007-04-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now the skb->nh union has just one member, .raw, i.e. it is just like the skb->mac union, strange, no? I'm just leaving it like that till the transport layer is done with, when we'll rename skb->mac.raw to skb->mac_header (or ->mac_header_offset?), ditto for ->{h,nh}. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | [SK_BUFF]: Introduce ip_hdr(), remove skb->nh.iphArnaldo Carvalho de Melo2007-04-26
| | | | | | | | | | | | | | | Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | [IP]: Introduce ip_hdrlen()Arnaldo Carvalho de Melo2007-04-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For the common sequence "skb->nh.iph->ihl * 4", removing a good number of open coded skb->nh.iph uses, now to go after the rest... Just out of curiosity, here are the idioms found to get the same result: skb->nh.iph->ihl << 2 skb->nh.iph->ihl<<2 skb->nh.iph->ihl * 4 skb->nh.iph->ihl*4 (skb->nh.iph)->ihl * sizeof(u32) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | [SK_BUFF]: Introduce skb_network_header()Arnaldo Carvalho de Melo2007-04-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | For the places where we need a pointer to the network header, it is still legal to touch skb->nh.raw directly if just adding to, subtracting from or setting it to another layer header. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | [SK_BUFF]: Introduce skb_mac_header()Arnaldo Carvalho de Melo2007-04-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For the places where we need a pointer to the mac header, it is still legal to touch skb->mac.raw directly if just adding to, subtracting from or setting it to another layer header. This one also converts some more cases to skb_reset_mac_header() that my regex missed as it had no spaces before nor after '=', ugh. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | [SK_BUFF]: Introduce skb_set_mac_header()Arnaldo Carvalho de Melo2007-04-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | For the cases where we want to set skb->mac.raw to an offset from skb->data. Simple cases first, the memmove ones and specially pktgen will be left for later. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | [SK_BUFF]: Introduce skb_reset_mac_header(skb)Arnaldo Carvalho de Melo2007-04-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For the common, open coded 'skb->mac.raw = skb->data' operation, so that we can later turn skb->mac.raw into a offset, reducing the size of struct sk_buff in 64bit land while possibly keeping it as a pointer on 32bit. This one touches just the most simple case, next will handle the slightly more "complex" cases. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | [QETH]: Use eth_hdr()Arnaldo Carvalho de Melo2007-04-26
| | | | | | | | | | | | | | | Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | [HIPPI/FDDI]: Make {hippi,fddi}_type_trans set skb->devArnaldo Carvalho de Melo2007-04-26
| | | | | | | | | | | | | | | | | | | | | Now all the _type_trans routines are consistent in this regard. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | [TR]: Use tr_hdr() were appropriateArnaldo Carvalho de Melo2007-04-26
| | | | | | | | | | | | | | | Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | [S390] SPIN_LOCK_UNLOCKED cleanup in drivers/s390Milind Arun Choudhary2007-04-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | SPIN_LOCK_UNLOCKED cleanup,use __SPIN_LOCK_UNLOCKED instead. Signed-off-by: Milind Arun Choudhary <milindchoudhary@gmail.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | | [S390] Processor degradation notification.Heiko Carstens2007-04-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | Generate uevents for all cpus if cpu capability changes. This can happen e.g. because the cpus are overheating. The cpu capability can be read via /sys/devices/system/cpu/cpuN/capability. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* | | [S390] sclp: fix coding style.Stefan Haberland2007-04-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | Use only capital letters for defines. Cc: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | | [S390] vmlogrdr: stop IUCV connection in vmlogrdr_release.Ursula Braun2007-04-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | Reopen of /dev/account failed. The IUCV path has to be terminated in vmlogrdr_release. Signed-off-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | | [S390] sclp: initialize early.Peter Oberparleiter2007-04-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | Add explicit sclp initialization for those sclp users that do not register with the interface. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | | [S390] ctc: kmalloc->kzalloc/casting cleanups.Ahmed S. Darwish2007-04-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A patch for the CTC / ESCON network driver. Switch from kmalloc to kzalloc when appropriate, remove some unnecessary kmalloc casts too. Since I have no s390 machine, I didn't compile it but I examined it carefully. Signed-off-by: "Ahmed S. Darwish" <darwish.07@gmail.com> Cc: Frank Pavlic <fpavlic@de.ibm.com> Cc: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | | [S390] zfcpdump support.Michael Holzheu2007-04-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | s390 machines provide hardware support for creating Linux dumps on SCSI disks. For creating a dump a special purpose dump Linux is used. The first 32 MB of memory are saved by the hardware before the dump Linux is booted. Via an SCLP interface, the saved memory can be accessed from Linux. This patch exports memory and registers of the crashed Linux to userspace via a debugfs file. For more information refer to Documentation/s390/zfcpdump.txt, which is included in this patch. Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* | | [S390] dasd: Add ipldev parameter.Peter Oberparleiter2007-04-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | Specifying 'ipldev' in the dasd= kernel parameter will automatically activate the boot device for use by the dasd driver. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | | [S390] dasd: Add sysfs attribute status and generate uevents.Horst Hummel2007-04-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds a sysfs-attribute 'status' to make the DASD device-status accessible from user-space. In addition, the DASD driver generates an uevent(CHANGE) for the ccw-device on each device-status change. This enables user-space applications (e.g. udev) to do related processing. Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | | [S390] Get rid of console setup functions.Heiko Carstens2007-04-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We get this: Section mismatch: reference to .init.text:con3270_consetup from .data between 'con3270' (at offset 0x45c8) and 'con3270_fn' Section mismatch: reference to .init.text:con3215_consetup from .data between 'con3215' (at offset 0x4678) and 'raw3215_ccw_driver' Since there is no difference between a non present console setup function and one that returns only 0 remove them. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* | | [S390] cio: Unregister ccw devices directly.Cornelia Huck2007-04-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We used to unregister ccw devices not directly from the I/O subchannel remove function in order to avoid lifelocks on the css bus semaphore. This semaphore is gone, and there is no reason to not unregister the ccw device directly (it is even better since it is more in keeping with the goal of immediate disconnect). Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | | [S390] cio: cm_enable memory leak.Cornelia Huck2007-04-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | We allocage two pages when channel path measurements are enabled via cm_enable. We must not forget to free them again when channel path measurements are disabled again. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | | [S390] cio: ccwgroup register vs. unregister.Cornelia Huck2007-04-27
| | | | | | | | | | | | | | | | | | | | | | | | Introduce a mutex for struct ccwgroup to prevent simuntaneous register/unregister on the same ccwgroup device. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | | [S390] cio: Dont call css_update_ssd_info from interrupt context.Cornelia Huck2007-04-27
| | | | | | | | | | | | | | | Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | | [S390] cio: fix subchannel channel-path data usagePeter Oberparleiter2007-04-27
| | | | | | | | | | | | | | | | | | | | | | | | Ensure that channel-path related subchannel data is only retrieved and used when it is valid and that it is updated when it may have changed. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | | [S390] cio: replace subchannel evaluation queue with bitmapPeter Oberparleiter2007-04-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use a bitmap for indicating which subchannels require evaluation instead of allocating memory for each evaluation request. This approach reduces memory consumption during recovery in case of massive evaluation request occurrence and removes the need for memory allocation failure handling. Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | | [S390] cio: Re-start path verification after aborting internal I/O.Stefan Bader2007-04-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Path verification triggered by changes to the available CHPIDs will be interrupted by another change but not re-started. This results in an invalid path mask. To solve this make sure to completely re-start path verification when changing the available paths. Signed-off-by: Stefan Bader <shbader@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | | [S390] cio: Use add_uevent_var.Cornelia Huck2007-04-27
| | | | | | | | | | | | | | | | | | | | | | | | Convert ccw_uevent to use add_uevent_var and adapt snprint_alias. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | | [S390] cio: Channel-path configure function.Peter Oberparleiter2007-04-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a new attribute to the channel-path sysfs directory through which channel-path configure operations can be triggered. Also listen for hardware events requesting channel-path configure operations and process them accordingly. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* | | [S390] cio: Clean up online_store.Cornelia Huck2007-04-27
| | | | | | | | | | | | | | | | | | | | | | | | Detangle the online_store code and make it more readable. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | | [S390] cio: observe chpid valid flagPeter Oberparleiter2007-04-27
| | | | | | | | | | | | | | | | | | | | | | | | Check validity flag of CHPID description data before continuing with channel-path initialization. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | | [S390] cio: Introduce separate files for channel-path related code.Peter Oberparleiter2007-04-27
| | | | | | | | | | | | | | | | | | Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* | | [S390] cio: Allow 0 and 1 as input for channel path status attribute.Peter Oberparleiter2007-04-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Channel path status can now be modified by writing '0' and '1' to the sysfs status attribute in addition to 'offline' and 'online' respectively. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* | | [S390] cio: Introduce struct chp_id.Peter Oberparleiter2007-04-27
| | | | | | | | | | | | | | | | | | | | | | | | Introduce data type for channel-path IDs. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* | | [S390] cio/ipl: Clean interface between cio and ipl code.Heiko Carstens2007-04-27
|/ / | | | | | | | | | | | | Clean interface between cio and ipl code, so Peter stops complaining. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* | [S390] cio: Fix handling of interrupt for csch().Cornelia Huck2007-04-04
| | | | | | | | | | | | | | | | | | Wipe internal irb if the clear function bit is set before accumulating bits from the irb in order to follow hardware behaviour. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | [S390] zcrypt: Fix ap_poll_requests counter in lost requests error path.Ralph Wuerthner2007-03-26
| | | | | | | | | | | | | | | | | | | | In the unlikely event that an AP device lost requests, don't forget to update the ap_poll_requests counter too. Same must happen in case an AP device is removed while there are still outstanding requests. Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Ralph Wuerthner <rwuerthn@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* | [S390] zcrypt: Fix possible dead lock in AP bus module.Ralph Wuerthner2007-03-26
| | | | | | | | | | | | | | | | | | | | | | | | If a AP device is unconfigured __ap_poll_all() will call device_unregister() in software interrupt context which can cause dead locks. To fix this the device will be only marked as unconfigured and the device_unregister() call will be done later by either ap_scan_bus() or ap_queue_message() in process context. Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Ralph Wuerthner <rwuerthn@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* | [S390] cio: Device status validity.Cornelia Huck2007-03-26
| | | | | | | | | | | | | | | | Only accumulate device status field in irb if it is valid. Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* | [S390] dasd: Work around gcc bug.Peter Oberparleiter2007-03-26
| | | | | | | | | | | | | | | | | | | | gcc incorrectly removes initialization of register 0 in dasd diag inline assembly. Use different register to work around this compiler bug. Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* | [S390] zcrypt: fix possible race when unloading zcrypt driver modulesRalph Wuerthner2007-03-19
| | | | | | | | | | | | | | | | Move try_module_get() call into spin protected block to prevent zcrypt driver module unload while submitting a request to driver. Signed-off-by: Ralph Wuerthner <rwuerthn@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | [S390] zcrypt: fix possible dead lock in AP bus moduleRalph Wuerthner2007-03-19
| | | | | | | | | | | | | | | | | | AP bus module uses bus_for_each_dev() in software interrupt context to poll for completed requests which might cause dead locks. Solution: use private AP device list for polling in software interrupt context. Signed-off-by: Ralph Wuerthner <rwuerthn@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | [S390] cio: qdio slsb setupUrsula Braun2007-03-19
| | | | | | | | | | | | | | | | Make sure set_slsb problems are handled correctly in qdio_do_qdio_fill_input() and qdio_do_qdio_fill_output. Signed-off-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | [PATCH] sysfs and driver core: add callback helper, used by SCSI and S390Alan Stern2007-03-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch (as868) adds a helper routine for device drivers that need to set up a callback to perform some action in a different process's context. This is intended for use by attribute methods that want to unregister themselves or their parent device. Attribute method calls are mutually exclusive with unregistration, so such actions cannot be taken directly. Two attribute methods are converted to use the new helper routine: one for SCSI device deletion and one for System/390 ccwgroup devices. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Cc: Hugh Dickins <hugh@veritas.com> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Cc: Oliver Neukum <oneukum@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | [PATCH] qeth gfp_t annotationsAl Viro2007-03-14
|/ | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [S390] cio: Call cancel_halt_clear even when actl == 0.Cornelia Huck2007-03-05
| | | | | | | | | The subchannel may just be status pending, even with actl == 0. We must go through the cancel_halt_clear procedure to put the subchannel into a defined state. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: Use path verification to check for path state.Cornelia Huck2007-03-05
| | | | | | | | | After I/O has been killed by the common I/O layer, trigger path verification which will queue cio_device_nopath_notify itself if it finds a device to be without paths. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: Fix locking when calling notify function.Cornelia Huck2007-03-05
| | | | | | | | Make sure we hold the device lock when we modify the ccw device structure but always call the notify function without the lock held. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] dasd: Use default recovery for SNSS requestsStefan Weinhuber2007-03-05
| | | | | | | | | | | | | | | | For extended error reporting we sometimes have to start an Sense Subsystem Status request (SNSS). When this request needs to be recovered for some reason, the recovery request will fail with 'command reject'. Our usual recovery procedure will retry the failed request by creating a new request and chaining the failed request from that one. SNSS requests, though, must not be chained from anything, so the recovery request will fail permanently. Use the default recovery for SNSS request, which will just restart the original request without further ado. Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] tape: Compression overwrites crypto settingMichael Holzheu2007-03-05
| | | | | | | | | | 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>