- 30 11月, 2012 2 次提交
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由 Stefan Haberland 提交于
The regular behavior of the DASD device driver when setting a device offline is to return all outstanding I/O as failed. This behavior is different from that of other System z operating systems and may lead to unexpected data loss. Adding an explicit 'safe' offline function will allow customers to use DASDs in the way they expect them to work. Signed-off-by: NStefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Stefan Haberland 提交于
If a channel path is cabled incorrectly and the device is suspended and resumed the device may be inaccessible afterwards. Make the path connection check not interrupt the resume callback there could be other valid paths available. Signed-off-by: NStefan Haberland <stefan.haberland@de.ibm.com> Reference-ID: RQM 1262 Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 23 11月, 2012 2 次提交
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由 Sebastian Ott 提交于
Let the dasd driver and qdio use ccw_device_get_schid and get rid of other similar functions. Signed-off-by: NSebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Sebastian Ott 提交于
Do not use more than one KERN_<level> per printk. Signed-off-by: NSebastian Ott <sebott@linux.vnet.ibm.com> Acked-by: NStefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 19 11月, 2012 1 次提交
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由 Adam Buchbinder 提交于
"Whether" is misspelled in various comments across the tree; this fixes them. No code changes. Signed-off-by: NAdam Buchbinder <adam.buchbinder@gmail.com> Signed-off-by: NJiri Kosina <jkosina@suse.cz>
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- 09 10月, 2012 1 次提交
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由 Sebastian Ott 提交于
Let the driver core handle device attribute creation and removal. This will simplify the code and eliminates races between attribute availability and userspace notification via uevents. Signed-off-by: NSebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 26 9月, 2012 8 次提交
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由 Stefan Haberland 提交于
A common way to prepare a z/VM mini disk is to format the real device with a z/VM tool like CPFMTXA and then define a mini disk that excludes the first cylinder, i.e. the cylinder 0 of the virtual disk is located at cylinder 1 of the real device. The DASD device driver will recognize such a mini disk as formatted, as the uniform record layout on the disk matches that of an LDL formatted device. However, the cylinder value in the 'count' field of the ECKD records matches the geometry of the real device, and not that of the mini disk, so I/O requests will fail with 'record not found' errors. To make the mini disk usable, it needs to be formatted with a tool like dasdfmt. To enable tools like distribution installation tools to recognize this situation, the DASD device driver should report such a mini disk as 'not formatted'. To this end we need to extend the device recognition code to check not just for proper record sizes, but also for proper cylinder/head/record values. Signed-off-by: NStefan Haberland <stefan.haberland@de.ibm.com> Reviewed-by: NStefan Weinhuber <wein@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Heiko Carstens 提交于
Change -ENOSYS to -EOPNOTSUPP. Return value is used only internally. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Heiko Carstens 提交于
For non-existent ioctls -ENOTTY should be returned. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Sebastian Ott 提交于
Do not reset drvdata before the block device is cleaned up. With a non-empty block queue drvdata could be accessed. Signed-off-by: NSebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Sebastian Ott 提交于
Remove the spinlock from struct scm_device. drvdata and attributes are guarded via device_lock. Signed-off-by: NSebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Sebastian Ott 提交于
Force writes to Storage Class Memory (SCM) to be in done in clusters. Signed-off-by: NSebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Sebastian Ott 提交于
Block device driver for Storage Class Memory (SCM). This driver provides a block device interface for each available SCM increment. Signed-off-by: NSebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Sebastian Ott 提交于
Add the eadm facility bits to the css characteristics and move them to a new header. Signed-off-by: NSebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 17 9月, 2012 2 次提交
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由 Stefan Haberland 提交于
Read unit address is done for all devices during online processing to read out LCU features. This is also done after disconnect/connect a LCU. Some older storage hardware does not provide the capability to read unit address configuration. This leads to a loop trying to read unit address configuration every 30 seconds. The device is still operational but logs are flooded with error messages. Fix the loop by recognizing a command reject saying that the suborder for ruac is not supported. Signed-off-by: NStefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Stefan Haberland 提交于
If a new path is available we need to verify the path data. If it is the first path for a device the stop bits are removed after path verification. If a pathgroup is established we need to set system characteristics for the lcu. Therefore I/O has to be started. If the device is stopped the set system characteristics worker may block the path verification worker and the device is blocked. Turn on failfast for set system characteristics CQR to prevent a deadlock with the path verification worker. If a pathgroup is established on a device that is not in use trigger path verification. Maybe we were not informed about a working path. Signed-off-by: NStefan Haberland <stefan.haberland@de.ibm.com> Reviewed-by: NStefan Weinhuber <wein@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 06 9月, 2012 1 次提交
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由 Sebastian Ott 提交于
Ensure that all work is done when the process waiting for a dasd state change is woken up. With this change it is save to assume that after a userspace triggered state change and a udev settle invocation there are no unexpected users of a dasd device. Acked-by: NStefan Weinhuber <wein@de.ibm.com> Signed-off-by: NSebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 28 8月, 2012 1 次提交
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由 Heiko Carstens 提交于
For unimplemented ioctls the dasd driver should return -ENOTTY. Reported-by: NWanlong Gao <gaowanlong@cn.fujitsu.com> Acked-by: NStefan Weinhuber <wein@de.ibm.com> Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 20 7月, 2012 1 次提交
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由 Heiko Carstens 提交于
Remove the file name from the comment at top of many files. In most cases the file name was wrong anyway, so it's rather pointless. Also unify the IBM copyright statement. We did have a lot of sightly different statements and wanted to change them one after another whenever a file gets touched. However that never happened. Instead people start to take the old/"wrong" statements to use as a template for new files. So unify all of them in one go. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
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- 16 7月, 2012 1 次提交
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由 Stefan Haberland 提交于
Add a mechanism to wait for outstanding IO during shutdown. Schedule the block_bh and device_bh and wait until our request queues are empty. Signed-off-by: NStefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
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- 24 5月, 2012 1 次提交
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由 Heiko Carstens 提交于
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 11 4月, 2012 1 次提交
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由 Julia Lawall 提交于
Extend some error paths to call dasd_sfree_request as done earlier in the function. The error-handling code is also moved to the end of the function. Signed-off-by: NJulia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 11 3月, 2012 2 次提交
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由 Stefan Haberland 提交于
Calling validate server on devices in offline processing may cause an OOPS in the dasd_sleep_on function. Signed-off-by: NStefan Haberland <stefan.haberland@de.ibm.com> Reviewed-by: NStefan Weinhuber <wein@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Heiko Carstens 提交于
The external interrupt handlers have a parameter called ext_int_code. Besides the name this paramter does not only contain the ext_int_code but in addition also the "cpu address" (POP) which caused the external interrupt. To make the code a bit more obvious pass a struct instead so the called function can easily distinguish between external interrupt code and cpu address. The cpu address field however is named "subcode" since some external interrupt sources do not pass a cpu address but a different parameter (or none at all). Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 27 2月, 2012 1 次提交
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由 Heiko Carstens 提交于
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: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 19 1月, 2012 2 次提交
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由 Stefan Haberland 提交于
If a pathgroup is established we get an event and have to revalidate the server to propagate supported features like PAV and enable them. Signed-off-by: NStefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Stefan Haberland 提交于
Remove the optimization that validate server is only called once per LCU. If a device is set online we only know that we already know the LCU. But if the pathgroup was lost in between we have to do a validate server again to activate some features. Since we have no indication when a pathgroup gets lost we have to do a validate server every time a device is set online. Signed-off-by: NStefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 04 1月, 2012 2 次提交
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由 Al Viro 提交于
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
Move invalidate_bdev, block_sync_page into fs/block_dev.c. Export kill_bdev as well, so brd doesn't have to open code it. Reduce buffer_head.h requirement accordingly. Removed a rather large comment from invalidate_bdev, as it looked a bit obsolete to bother moving. The small comment replacing it says enough. Signed-off-by: NNick Piggin <npiggin@suse.de> Cc: Al Viro <viro@ZenIV.linux.org.uk> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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- 27 12月, 2011 3 次提交
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由 Stefan Haberland 提交于
If an IO request is build on an alias device without prefix enabled we try to calculate with zero data from the alias device. This triggers a BUG statement with fixpoint divide exception. This case is very unlikely and can only happen if the pathgroup is lost with an alias device already in use. Prevent the alias device from being used in this case. Signed-off-by: NStefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Stefan Haberland 提交于
Prevents possible data corruption by detecting cabling error. Therefor read and compare the UID for all available channel paths. Signed-off-by: NStefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Stefan Weinhuber 提交于
The 'expires' value of a ccw requests defines how long the device driver should wait for a response from the evice after the request has been submitted to the channel subsystem. After the expiration time (e.g. 30 seconds) the waiting request will be cancelled and started again. This protects the DASD devices from beeing blocked by errors that cause the answering I/O interrupt to be lost. In case of error recovery requests, this 'expires' value used to be set to 0, so in case of a lost interrupt, such a recovery request would never expire and block the device. To prevent this kind of problem, all recovery requests need to have an expires value > 0 as well. If not specified otherwise, this should be the same expires value as for the original request. Signed-off-by: NStefan Weinhuber <wein@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 22 12月, 2011 1 次提交
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由 Kay Sievers 提交于
The sysdev.h file should not be needed by any in-kernel code, so remove the .h file from these random files that seem to still want to include it. The sysdev code will be going away soon, so this include needs to be removed no matter what. Cc: Jiandong Zheng <jdzheng@broadcom.com> Cc: Scott Branden <sbranden@broadcom.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Kukjin Kim <kgene.kim@samsung.com> Cc: David Brown <davidb@codeaurora.org> Cc: Daniel Walker <dwalker@fifo99.com> Cc: Bryan Huntsman <bryanh@codeaurora.org> Cc: Ben Dooks <ben-linux@fluff.org> Cc: Wan ZongShun <mcuos.com@gmail.com> Cc: Haavard Skinnemoen <hskinnemoen@gmail.com> Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Cc: "Venkatesh Pallipadi Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Matthew Garrett <mjg@redhat.com> Signed-off-by: NKay Sievers <kay.sievers@vrfy.org>
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- 30 10月, 2011 5 次提交
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由 Martin Schwidefsky 提交于
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: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Stefan Haberland 提交于
Mark the device as suspended and delay execution of the path verification worker to prevent mix-up. Signed-off-by: NStefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Stefan Haberland 提交于
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: NStefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Stefan Haberland 提交于
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: NStefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Peter Oberparleiter 提交于
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: NPeter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 12 9月, 2011 1 次提交
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由 Christoph Hellwig 提交于
There is very little benefit in allowing to let a ->make_request instance update the bios device and sector and loop around it in __generic_make_request when we can archive the same through calling generic_make_request from the driver and letting the loop in generic_make_request handle it. Note that various drivers got the return value from ->make_request and returned non-zero values for errors. Signed-off-by: NChristoph Hellwig <hch@lst.de> Acked-by: NNeilBrown <neilb@suse.de> Signed-off-by: NJens Axboe <jaxboe@fusionio.com>
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- 24 8月, 2011 1 次提交
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由 Julia Lawall 提交于
Data is only used to temporarily hold information to be copied to the user level, so it should be freed before leaving the function. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @exists@ local idexpression x; statement S,S1; expression E; identifier fl; expression *ptr != NULL; @@ x = \(kmalloc\|kzalloc\|kcalloc\)(...); ... if (x == NULL) S <... when != x when != if (...) { <+...kfree(x)...+> } when any when != true x == NULL x->fl ...> ( if (x == NULL) S1 | if (...) { ... when != x when forall ( return \(0\|<+...x...+>\|ptr\); | * return ...; ) } ) // </smpl> Signed-off-by: NJulia Lawall <julia@diku.dk> Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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