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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2008-02-05 16:50:50 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-02-05 16:51:01 +0100 |
| commit | c5411dba58c28736d25cffef65da1e01ed7d1423 (patch) | |
| tree | a324e9b05b4676162be7dfbcb6f4331c94490d7c | |
| parent | 0189103c69f47712a0c542a8bc28ff46ebe53a8a (diff) | |
| download | op-kernel-dev-c5411dba58c28736d25cffef65da1e01ed7d1423.zip op-kernel-dev-c5411dba58c28736d25cffef65da1e01ed7d1423.tar.gz | |
[S390] dcss: Initialize workqueue before using it.
In case a dcss segment cannot be loaded blk_cleanup_queue
will be called before blk_queue_make_request, leaving the
struct work unplug_work of the request queue uninitialized
before it is used.
That leads also to the lockdep message below.
To avoid that call blk_queue_make_request right after the
request_queue has been allocated.
This makes sure that the struct work is always initialized
before it is used.
INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 2 Not tainted 2.6.24 #6
Process swapper (pid: 1, task: 000000000f854038, ksp: 000000000f85f980)
040000000f85f860 000000000f85f880 0000000000000002 0000000000000000
000000000f85f920 000000000f85f898 000000000f85f898 000000000001622e
0000000000000000 000000000f85f980 0000000000000000 0000000000000000
000000000f85f880 000000000000000c 000000000f85f880 000000000f85f8f0
0000000000342908 000000000001622e 000000000f85f880 000000000f85f8d0
Call Trace:
([<000000000001619e>] show_trace+0xda/0x104)
[<0000000000016288>] show_stack+0xc0/0xf8
[<00000000000163d0>] dump_stack+0xb0/0xc0
[<000000000006e4ea>] __lock_acquire+0x47e/0x1160
[<000000000006f27c>] lock_acquire+0xb0/0xd8
[<000000000005a522>] __cancel_work_timer+0x9e/0x240
[<000000000005a72e>] cancel_work_sync+0x2a/0x3c
[<0000000000165c46>] kblockd_flush_work+0x26/0x34
[<0000000000169034>] blk_sync_queue+0x38/0x48
[<0000000000169080>] blk_release_queue+0x3c/0xa8
[<000000000017bce8>] kobject_cleanup+0x58/0xac
[<000000000017bd66>] kobject_release+0x2a/0x38
[<000000000017d28e>] kref_put+0x6e/0x94
[<000000000017bc80>] kobject_put+0x38/0x48
[<00000000001653be>] blk_put_queue+0x2a/0x38
[<0000000000168fee>] blk_cleanup_queue+0x82/0x90
[<0000000000213e7e>] dcssblk_add_store+0x34e/0x700
[<00000000005243b8>] dcssblk_init+0x1a0/0x308
[<000000000050a3c2>] kernel_init+0x1b2/0x3a4
[<000000000001ac82>] kernel_thread_starter+0x6/0xc
[<000000000001ac7c>] kernel_thread_starter+0x0/0xc
INFO: lockdep is turned off.
Cc: Gerald Schaefer <geraldsc@de.ibm.com>
Cc: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| -rw-r--r-- | drivers/s390/block/dcssblk.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c index 7779bfc..3faf053 100644 --- a/drivers/s390/block/dcssblk.c +++ b/drivers/s390/block/dcssblk.c @@ -415,6 +415,8 @@ dcssblk_add_store(struct device *dev, struct device_attribute *attr, const char dev_info->gd->queue = dev_info->dcssblk_queue; dev_info->gd->private_data = dev_info; dev_info->gd->driverfs_dev = &dev_info->dev; + blk_queue_make_request(dev_info->dcssblk_queue, dcssblk_make_request); + blk_queue_hardsect_size(dev_info->dcssblk_queue, 4096); /* * load the segment */ @@ -472,9 +474,6 @@ dcssblk_add_store(struct device *dev, struct device_attribute *attr, const char if (rc) goto unregister_dev; - blk_queue_make_request(dev_info->dcssblk_queue, dcssblk_make_request); - blk_queue_hardsect_size(dev_info->dcssblk_queue, 4096); - add_disk(dev_info->gd); switch (dev_info->segment_type) { |
