kernel/git/stable/linux.git/drivers/s390/block, branch linux-3.2.y

s390/dasd: fix hanging device after clear subchannel

2016-11-20T01:01:32+00:00

commit 9ba333dc55cbb9523553df973adb3024d223e905 upstream. When a device is in a status where CIO has killed all I/O by itself the interrupt for a clear request may not contain an irb to determine the clear function. Instead it contains an error pointer -EIO. This was ignored by the DASD int_handler leading to a hanging device waiting for a clear interrupt. Handle -EIO error pointer correctly for requests that are clear pending and treat the clear as successful. Signed-off-by: Stefan Haberland Reviewed-by: Sebastian Ott Signed-off-by: Martin Schwidefsky [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings

s390/dasd: fix refcount for PAV reassignment

2016-04-01T00:54:32+00:00

commit 9d862ababb609439c5d6987f6d3ddd09e703aa0b upstream. Add refcount to the DASD device when a summary unit check worker is scheduled. This prevents that the device is set offline with worker in place. Signed-off-by: Stefan Haberland Signed-off-by: Martin Schwidefsky Signed-off-by: Ben Hutchings

s390/dasd: prevent incorrect length error under z/VM after PAV changes

2016-04-01T00:54:32+00:00

commit 020bf042e5b397479c1174081b935d0ff15d1a64 upstream. The channel checks the specified length and the provided amount of data for CCWs and provides an incorrect length error if the size does not match. Under z/VM with simulation activated the length may get changed. Having the suppress length indication bit set is stated as good CCW coding practice and avoids errors under z/VM. Signed-off-by: Stefan Haberland Signed-off-by: Martin Schwidefsky Signed-off-by: Ben Hutchings

compat: fix compile breakage on s390

2012-03-12T19:31:22+00:00

commit 048cd4e51d24ebf7f3552226d03c769d6ad91658 upstream. The new is_compat_task() define for the !COMPAT case in include/linux/compat.h conflicts with a similar define in arch/s390/include/asm/compat.h. This is the minimal patch which fixes the build issues. Signed-off-by: Heiko Carstens Signed-off-by: Linus Torvalds Cc: Jonathan Nieder Signed-off-by: Greg Kroah-Hartman

Merge branch 'for-3.2/core' of git://git.kernel.dk/linux-block

2011-11-05T00:06:58+00:00

* 'for-3.2/core' of git://git.kernel.dk/linux-block: (29 commits) block: don't call blk_drain_queue() if elevator is not up blk-throttle: use queue_is_locked() instead of lockdep_is_held() blk-throttle: Take blkcg->lock while traversing blkcg->policy_list blk-throttle: Free up policy node associated with deleted rule block: warn if tag is greater than real_max_depth. block: make gendisk hold a reference to its queue blk-flush: move the queue kick into blk-flush: fix invalid BUG_ON in blk_insert_flush block: Remove the control of complete cpu from bio. block: fix a typo in the blk-cgroup.h file block: initialize the bounce pool if high memory may be added later block: fix request_queue lifetime handling by making blk_queue_cleanup() properly shutdown block: drop @tsk from attempt_plug_merge() and explain sync rules block: make get_request[_wait]() fail if queue is dead block: reorganize throtl_get_tg() and blk_throtl_bio() block: reorganize queue draining block: drop unnecessary blk_get/put_queue() in scsi_cmd_ioctl() and blk_get_tg() block: pass around REQ_* flags instead of broken down booleans during request alloc/free block: move blk_throtl prototypes to block/blk.h block: fix genhd refcounting in blkio_policy_parse_and_set() ... Fix up trivial conflicts due to "mddev_t" -> "struct mddev" conversion and making the request functions be of type "void" instead of "int" in - drivers/md/{faulty.c,linear.c,md.c,md.h,multipath.c,raid0.c,raid1.c,raid10.c,raid5.c} - drivers/staging/zram/zram_drv.c

[S390] sparse: fix sparse NULL pointer warnings

2011-10-30T14:16:46+00:00

Fix two NULL pointer warnings in the dasd driver: drivers/s390/block/dasd_eckd.c:2353:20: warning: Using plain integer as NULL pointer drivers/s390/block/dasd_eckd.c:2415:44: warning: Using plain integer as NULL pointer Signed-off-by: Martin Schwidefsky

[S390] dasd: prevent path verification before resume

2011-10-30T14:16:45+00:00

Mark the device as suspended and delay execution of the path verification worker to prevent mix-up. Signed-off-by: Stefan Haberland Signed-off-by: Martin Schwidefsky

[S390] dasd: re-initialize read_conf buffer for retries

2011-10-30T14:16:44+00:00

The buffer for read configuration data has to be initialized with an EBCDIC string to show support for extended UIDs to z/VM. If this read configuration data CQR needs to be retried, the buffer may have changed in between. So re-initialize the buffer to get a correct extended UID under z/VM. Signed-off-by: Stefan Haberland Signed-off-by: Martin Schwidefsky

[S390] dasd: wait for terminated request

2011-10-30T14:16:44+00:00

After terminating a request in the dasd_sleep_on_immediatly function, wait for the clear interrupt to be received before starting the new request. This prevents the requests from getting mixed up. Signed-off-by: Stefan Haberland Signed-off-by: Martin Schwidefsky

[S390] fix mismatch in summation of I/O IRQ statistics

2011-10-30T14:16:15+00:00

Current IRQ statistics support does not show detail counts for I/O interrupts which are processed internally only. The result is a summation count which is way off such as this one: CPU0 CPU1 CPU2 I/O: 1331 710 442 [...] QAI: 15 16 16 [I/O] QDIO Adapter Interrupt QDI: 1 0 0 [I/O] QDIO Interrupt DAS: 706 645 381 [I/O] DASD C15: 26 10 0 [I/O] 3215 C70: 0 0 0 [I/O] 3270 TAP: 0 0 0 [I/O] Tape VMR: 0 0 0 [I/O] Unit Record Devices LCS: 0 0 0 [I/O] LCS CLW: 0 0 0 [I/O] CLAW CTC: 0 0 0 [I/O] CTC APB: 0 0 0 [I/O] AP Bus Fix this by moving I/O interrupt accounting into the common I/O layer. Signed-off-by: Peter Oberparleiter Signed-off-by: Martin Schwidefsky