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author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-04-08 07:36:14 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-04-08 07:36:14 -0700 |
commit | bb3c90f0de7b34995b5e35cf5dc97a3d428b3761 (patch) | |
tree | d5d07b61c0ab6d8688579a255e2b97b624637336 /drivers/s390 | |
parent | 3d762ca1cdf38b5fb7d1774734176d1d4d56bbb7 (diff) | |
parent | 8838101183bba239f100b0cfe31d9ebbfc2f1bd4 (diff) | |
download | linux-stable-bb3c90f0de7b34995b5e35cf5dc97a3d428b3761.tar.gz linux-stable-bb3c90f0de7b34995b5e35cf5dc97a3d428b3761.tar.bz2 linux-stable-bb3c90f0de7b34995b5e35cf5dc97a3d428b3761.zip |
Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6
* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6:
[S390] compile fix for latest binutils
[S390] cio: prevent purging of CCW devices in the online state
[S390] qdio: fix init sequence
[S390] Fix parameter passing for smp_switch_to_cpu()
[S390] oprofile s390: prevent stack corruption
Diffstat (limited to 'drivers/s390')
-rw-r--r-- | drivers/s390/cio/device.c | 24 | ||||
-rw-r--r-- | drivers/s390/cio/qdio_main.c | 16 |
2 files changed, 26 insertions, 14 deletions
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index df14c51f6532..8e04c00cf0ad 100644 --- a/drivers/s390/cio/device.c +++ b/drivers/s390/cio/device.c @@ -541,15 +541,24 @@ static ssize_t online_store (struct device *dev, struct device_attribute *attr, int force, ret; unsigned long i; - if (!dev_fsm_final_state(cdev) && - cdev->private->state != DEV_STATE_DISCONNECTED) - return -EAGAIN; + /* Prevent conflict between multiple on-/offline processing requests. */ if (atomic_cmpxchg(&cdev->private->onoff, 0, 1) != 0) return -EAGAIN; + /* Prevent conflict between internal I/Os and on-/offline processing. */ + if (!dev_fsm_final_state(cdev) && + cdev->private->state != DEV_STATE_DISCONNECTED) { + ret = -EAGAIN; + goto out_onoff; + } + /* Prevent conflict between pending work and on-/offline processing.*/ + if (work_pending(&cdev->private->todo_work)) { + ret = -EAGAIN; + goto out_onoff; + } if (cdev->drv && !try_module_get(cdev->drv->driver.owner)) { - atomic_set(&cdev->private->onoff, 0); - return -EINVAL; + ret = -EINVAL; + goto out_onoff; } if (!strncmp(buf, "force\n", count)) { force = 1; @@ -574,6 +583,7 @@ static ssize_t online_store (struct device *dev, struct device_attribute *attr, out: if (cdev->drv) module_put(cdev->drv->driver.owner); +out_onoff: atomic_set(&cdev->private->onoff, 0); return (ret < 0) ? ret : count; } @@ -1311,10 +1321,12 @@ static int purge_fn(struct device *dev, void *data) spin_lock_irq(cdev->ccwlock); if (is_blacklisted(id->ssid, id->devno) && - (cdev->private->state == DEV_STATE_OFFLINE)) { + (cdev->private->state == DEV_STATE_OFFLINE) && + (atomic_cmpxchg(&cdev->private->onoff, 0, 1) == 0)) { CIO_MSG_EVENT(3, "ccw: purging 0.%x.%04x\n", id->ssid, id->devno); ccw_device_sched_todo(cdev, CDEV_TODO_UNREG); + atomic_set(&cdev->private->onoff, 0); } spin_unlock_irq(cdev->ccwlock); /* Abort loop in case of pending signal. */ diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c index 479c665e9e7c..c532ba929ccd 100644 --- a/drivers/s390/cio/qdio_main.c +++ b/drivers/s390/cio/qdio_main.c @@ -1649,26 +1649,26 @@ static int __init init_QDIO(void) { int rc; - rc = qdio_setup_init(); + rc = qdio_debug_init(); if (rc) return rc; + rc = qdio_setup_init(); + if (rc) + goto out_debug; rc = tiqdio_allocate_memory(); if (rc) goto out_cache; - rc = qdio_debug_init(); - if (rc) - goto out_ti; rc = tiqdio_register_thinints(); if (rc) - goto out_debug; + goto out_ti; return 0; -out_debug: - qdio_debug_exit(); out_ti: tiqdio_free_memory(); out_cache: qdio_setup_exit(); +out_debug: + qdio_debug_exit(); return rc; } @@ -1676,8 +1676,8 @@ static void __exit exit_QDIO(void) { tiqdio_unregister_thinints(); tiqdio_free_memory(); - qdio_debug_exit(); qdio_setup_exit(); + qdio_debug_exit(); } module_init(init_QDIO); |