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path: root/drivers/s390/char/vmur.c
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2008-07-21device create: s390: convert device_create to device_create_drvdataGreg Kroah-Hartman
device_create() is race-prone, so use the race-free device_create_drvdata() instead as device_create() is going away. Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-07-17[S390] vmur: Fix return code handling.Frank Munzert
Use -EOPNOTSUPP instead of -ENOTSUPP. Signed-off-by: Frank Munzert <munzert@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-07-14Merge branch 'bkl-removal' of git://git.lwn.net/linux-2.6Linus Torvalds
* 'bkl-removal' of git://git.lwn.net/linux-2.6: (146 commits) IB/umad: BKL is not needed for ib_umad_open() IB/uverbs: BKL is not needed for ib_uverbs_open() bf561-coreb: BKL unneeded for open() Call fasync() functions without the BKL snd/PCM: fasync BKL pushdown ipmi: fasync BKL pushdown ecryptfs: fasync BKL pushdown Bluetooth VHCI: fasync BKL pushdown tty_io: fasync BKL pushdown tun: fasync BKL pushdown i2o: fasync BKL pushdown mpt: fasync BKL pushdown Remove BKL from remote_llseek v2 Make FAT users happier by not deadlocking x86-mce: BKL pushdown vmwatchdog: BKL pushdown vmcp: BKL pushdown via-pmu: BKL pushdown uml-random: BKL pushdown uml-mmapper: BKL pushdown ...
2008-07-14[S390] cio: introduce fcx enabled scsw formatPeter Oberparleiter
Extend the scsw data structure to the format required by fcx. Also provide helper functions for easier access to fields which are present in both the traditional as well as the modified format. 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>
2008-06-20drivers/s390: cdev lock_kernel() pushdownJonathan Corbet
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2008-04-17[S390] vmur: Use wait queue instead of mutex to serialize openFrank Munzert
If user space opens a unit record device node then vmur is leaving the kernel with lock open_mutex still held to prevent other processes from opening the device simultaneously. This causes lockdep to complain about a lock held when returning to user space. Now the mutex is replaced by a wait queue to serialize device open. Signed-off-by: Frank Munzert <munzert@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2008-01-26[S390] constify function pointer tables.Jan Engelhardt
Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2007-08-22[S390] vmur: fix reference counting for vmur device structureMichael Holzheu
When a vmur device is removed due to a detach of the device, currently the ur device structure is freed. Unfortunately it can happen, that there is still a user of the device structure, when the character device is open during the detach process. To fix this, reference counting for the vmur structure is introduced. In addition to that, the online, offline, probe and remove functions are serialized now using a global mutex. 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>
2007-08-22[S390] vmur: fix diag14 exceptions with addresses > 2GB.Michael Holzheu
There are several s390 diagnose calls, which must be executed below the 2GB memory boundary. In order to enforce this, those diagnoses must be compiled into the kernel. Currently diag 14 can be called within the vmur kernel module from addresses above 2GB. This leads to specification exceptions. This patch moves diag10, diag14 and diag210 into the new diag.c file. 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>
2007-08-10[S390] vmur: diag14 only works with buffers below 2GBMichael Holzheu
If memory buffers above 2GB are used, diagnose 14 raises a specification exception. This fix ensures that buffer allocation is done below the 2GB boundary. Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2007-08-10[S390] vmur: add "top of queue" sanity check for reader openMichael Holzheu
If the z/VM reader is already open, it can happen that after opening the Linux reader device, not the topmost file is processed. According the semantics of the Linux z/VM unit record device driver, always the topmost file has to be processed. With this fix an error is returned if that is not the case. Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2007-08-10[S390] vmur: reject open on z/VM reader files with status HOLDMichael Holzheu
If a reader file with HOLD status is at the top of the reader queue, currently all read requests will return data of the second file in the queue. But the semantics of vmur is that always the topmost file is read. With this fix -EPERM is returned on open, if the topmost reader file is in HOLD status. Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2007-08-10[S390] vmur: use DECLARE_COMPLETION_ONSTACK to keep lockdep happyHeiko Carstens
INFO: trying to register non-static key. the code is fine but needs lockdep annotation. turning off the locking correctness validator. 000000000ff9fb08 000000000ff9fb18 0000000000000002 0000000000000000 000000000ff9fbb8 000000000ff9fb30 000000000ff9fb30 0000000000104198 0000000000000000 0000000000000002 0000000000000000 0000000000000000 000000000ff9fb18 000000000000000c 000000000ff9fb18 000000000ff9fb88 0000000000448db0 0000000000104198 000000000ff9fb18 000000000ff9fb68 Call Trace: ([<00000000001040ea>] show_trace+0x12e/0x170) [<00000000001041f2>] show_stack+0xc6/0xf8 [<0000000000104252>] dump_stack+0x2e/0x3c [<0000000000155f9c>] __lock_acquire+0x460/0x1048 [<0000000000156c16>] lock_acquire+0x92/0xb8 [<000000000043f406>] _spin_lock_irqsave+0x62/0x80 [<0000000000121382>] complete+0x32/0x78 [<000000001082b468>] ur_int_handler+0xc8/0xec [vmur] [<0000000000313216>] ccw_device_call_handler+0xae/0xd4 [<0000000000310da4>] ccw_device_irq+0x5c/0x130 [<0000000000312c84>] io_subchannel_irq+0x8c/0x118 [<000000000030a88c>] do_IRQ+0x16c/0x194 [<0000000000111a62>] io_no_vtime+0x16/0x1c [<0000000080001394>] 0x80001394 Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2007-08-10[S390] vmur: allocate single record buffers instead of one big data bufferMichael Holzheu
vmur allocates one contiguous kernel buffer to copy user data when creating ccw programs for punch or printer. If big block sizes are used, under memory pressure it can happen, that we do not get memory in one chunk. Now we allocate memory for each single record to avoid high order allocations. Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2007-07-27[S390] vmur: fix diag14_read.Frank Munzert
Record length of spool file must be only stored in 1st SPLINK record Signed-off-by: Frank Munzert <munzert@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2007-07-17[S390] z/VM unit record device driverFrank Munzert
z/VM Unit record character device driver to access VM reader, punch, and printer. Signed-off-by: Frank Munzert <munzert@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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