- 10 Oct, 2008 3 commits
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Kay Sievers authored
bus_id -> dev_name() conversions in s390 code. [cornelia.huck@de.ibm.com: minor adaptions] Signed-off-by:
Kay Sievers <kay.sievers@vrfy.org> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com>
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Peter Oberparleiter authored
Allow users to remove blacklisted ccw devices by using the /proc/cio_ignore interface: echo purge > /proc/cio_ignore will remove all devices which are offline and blacklisted. Signed-off-by:
Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by:
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Peter Oberparleiter authored
Use dedicated slow path work queue when unregistering a device due to a user action. This ensures serialialization of other register/ unregister requests. Signed-off-by:
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- 21 Aug, 2008 1 commit
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Peter Oberparleiter authored
Calling a ccw driver's notify function without the ccw device lock held opens up a race window between discovery and handling of a change in the device operational state. As a result, the device driver may encounter unexpected device malfunction, leading to out-of-retry situations or similar. Remove race by extending the ccw device lock from state change discovery to the calling of the notify function. Signed-off-by:
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- 14 Jul, 2008 8 commits
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Michael Ernst authored
Unnecessary dev_info, dev_warn and printk messages are removed. Signed-off-by:
Michael Ernst <mernst@de.ibm.com> Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com>
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Cornelia Huck authored
css_device_id exists, so use it for determining the right driver (and add a match_flags which is always 1 for valid types). Signed-off-by:
Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by:
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Cornelia Huck authored
Passing the affected chpid in chp_event() worked only by chance since chpid is the first element in res_acc_data. Make it work properly by generalizing res_acc_data as chp_link and always passing around a properly filled out chp_link structure in chp_event(). Signed-off-by:
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Cornelia Huck authored
Replace the numeric values for I/O interruption subclass usage with abstract definitions and collect them all in asm/isc.h. This gives us a better overview of which iscs are actually used and makes it possible to better spread out isc usage in the future. Signed-off-by:
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Peter Oberparleiter authored
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:
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Cornelia Huck authored
Rework the css driver methods to provide sane callbacks for subchannels of all types. As a bonus, this cleans up and simplyfies the machine check handling for I/O subchannels a lot. Signed-off-by:
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Cornelia Huck authored
Add modalias and subchannel type attributes for all subchannels. I/O subchannel specific attributes are now created in io_subchannel_probe(). modalias and subchannel type are also added to the uevent for the css bus. Also make the css modalias known. Signed-off-by:
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Cornelia Huck authored
Register all valid subchannels, not only I/O subchannels. Move I/O subchannel specific initialization to io_subchannel_probe(). Signed-off-by:
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- 07 May, 2008 1 commit
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Michael Ernst authored
The only sporadically used CIO_DEBUG messages are replaced by ordinary CIO_MSG_EVENT messages. The CIO_MSG_EVENT messages debug levels are consolidated. Signed-off-by:
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- 30 Apr, 2008 1 commit
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Cornelia Huck authored
Make parsing of attribute writes handle incorrect input better. Signed-off-by:
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- 17 Apr, 2008 1 commit
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Heiko Carstens authored
Most noteable part of this commit is the new local header file entry.h which contains all the function declarations of functions that get only called from asm code or are arch internal. That way we can avoid extern declarations in C files. This is more or less the same that was done for sparc64. Signed-off-by:
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- 19 Feb, 2008 2 commits
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Cornelia Huck authored
We can't do our recovery in softirq context, so we schedule it from our timer function. Signed-off-by:
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Cornelia Huck authored
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- 26 Jan, 2008 6 commits
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Peter Oberparleiter authored
Add a timed recovery procedure to reactivate ccw devices in cases where HW/VM events are not sufficient to allow for proper recovery of reappearing channel paths. Signed-off-by:
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Cornelia Huck authored
Set the owner field in the embedded struct device_driver to the value provided in the {css,ccw,ccwgroup}_driver. Signed-off-by: -
Cornelia Huck authored
Also define helpers sch_{g,s}et_cdev() to make the intention more clear. Signed-off-by: -
Cornelia Huck authored
Introduce a private pointer in struct subchannel to store per-subchannel type data (cannot use dev->priv since this is already used for something else). Create a new header io_sch.h for I/O subchannel specific structures and instructions. Signed-off-by:
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Cornelia Huck authored
Add wrapper functions for driver_register and driver_unregister so that css drivers don't need to muck with struct device_driver directly. Signed-off-by:
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Cornelia Huck authored
Make all callbacks in css_driver take a struct subchannel (and not a struct device). Signed-off-by:
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- 05 Nov, 2007 1 commit
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Heiko Carstens authored
Use INIT_WORK to initialize struct work and don't initialize a struct work partial by explicitly initializing its private structures. Fixes the following lockdep bug because no key was assigned: INFO: trying to register non-static key. the code is fine but needs lockdep annotation. turning off the locking correctness validator. 0000000001f07bb8 0000000001f07bf8 0000000000000002 0000000000000000 0000000001f07c98 0000000001f07c10 0000000001f07c10 0000000000015406 0000000000000000 0000000000000002 0000000000000000 0000000000000000 0000000001f07bf8 000000000000000c 0000000001f07bf8 0000000001f07c68 000000000039ae60 0000000000015406 0000000001f07bf8 0000000001f07c48 Call Trace: ([<0000000000015376>] show_trace+0xda/0x104) [<0000000000015460>] show_stack+0xc0/0xf8 [<00000000000154c6>] dump_stack+0x2e/0x3c [<000000000006a71e>] __lock_acquire+0x47e/0x11a0 [<000000000006b4f0>] lock_acquire+0xb0/0xd8 [<00000000000555a6>] run_workqueue+0x1aa/0x24c [<00000000000556de>] worker_thread+0x96/0xf4 [<000000000005c210>] kthread+0x90/0xb4 [<000000000001947a>] kernel_thread_starter+0x6/0xc [<0000000000019474>] kernel_thread_starter+0x0/0xc Signed-off-by:
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- 12 Oct, 2007 6 commits
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Kay Sievers authored
This changes the uevent buffer functions to use a struct instead of a long list of parameters. It does no longer require the caller to do the proper buffer termination and size accounting, which is currently wrong in some places. It fixes a known bug where parts of the uevent environment are overwritten because of wrong index calculations. Many thanks to Mathieu Desnoyers for finding bugs and improving the error handling. Signed-off-by:
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Cornelia Huck authored
There was the possibilty that an action like ccw_device_set_offline() triggered by a device gone machine check might trigger a not oper event. Unfortunately, this could lead to the situation that we tried to unregister a subchannel twice: Once from the slow path evaluation, and once via the not oper event. Fix this by always using the same mechanism (css_schedule_eval()) for triggering the unregister. This makes sure that unregistration will only be done once. As an added bonus, it also simplyfies the code. Signed-off-by:
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Cornelia Huck authored
Don't forget to set dev->groups for early ccw devices like the console device so the default attributes are created. Signed-off-by:
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Cornelia Huck authored
Disable channel measurements for all ccw devices via the ccw bus's shutdown method. Clear residual cmf related information that may be in the schib when setting up a new subchannel. Signed-off-by:
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Cornelia Huck authored
Introduce a shutdown method for the ccw bus that calls the driver specific shutdown method in struct ccw_driver. Switch zfcp to the new ccw_driver shutdown method. Signed-off-by:
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Cornelia Huck authored
Comment a bunch of function in docbook style and convert existing comments on structures to docbook. Signed-off-by:
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- 22 Aug, 2007 1 commit
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Cornelia Huck authored
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- 27 Jul, 2007 1 commit
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Cornelia Huck authored
- Remove unneeded messages. - Move some messages into the debug feature. - Use dev_* where appropriate. - Use "cio: " prefix consistently. Signed-off-by:
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- 17 Jul, 2007 1 commit
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Cornelia Huck authored
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- 31 May, 2007 1 commit
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Cornelia Huck authored
We can't deregister disconnected and orphaned devices directly from the online attribute's store method, but must take a detour. Signed-off-by:
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- 10 May, 2007 1 commit
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Cornelia Huck authored
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- 27 Apr, 2007 5 commits
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Cornelia Huck authored
We often have the situation that we register a subchannel and start device recognition, only to find out that the device is not usable after all, which triggers an unregister of the subchannel. This often happens on hundreds of subchannels on a LPAR, leading to a storm of events which aren't of any use. Therefore, use uevent_suppress to delay the KOBJ_ADD uevent for a subchannel until we know that its ccw_device is to be registered. Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Cornelia Huck authored
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:
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Cornelia Huck authored
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Peter Oberparleiter authored
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:
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Cornelia Huck authored
Convert ccw_uevent to use add_uevent_var and adapt snprint_alias. Signed-off-by:
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