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author | Tejun Heo <tj@kernel.org> | 2014-02-03 14:03:04 -0500 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-02-07 15:42:41 -0800 |
commit | 0b60f9ead5d4816e7e3d6e28f4a0d22d4a1b2513 (patch) | |
tree | 2c46f7db6815641b51553b3c4bfa5a76e0ccd06d /arch | |
parent | ac0ece9174aca9aa895ce0accc54f1f8ff12d117 (diff) | |
download | op-kernel-dev-0b60f9ead5d4816e7e3d6e28f4a0d22d4a1b2513.zip op-kernel-dev-0b60f9ead5d4816e7e3d6e28f4a0d22d4a1b2513.tar.gz |
s390: use device_remove_file_self() instead of device_schedule_callback()
driver-core now supports synchrnous self-deletion of attributes and
the asynchrnous removal mechanism is scheduled for removal. Use it
instead of device_schedule_callback().
* Conversions in arch/s390/pci/pci_sysfs.c and
drivers/s390/block/dcssblk.c are straightforward.
* drivers/s390/cio/ccwgroup.c is a bit more tricky because
ccwgroup_notifier() was (ab)using device_schedule_callback() to
purely obtain a process context to kick off ungroup operation which
may block from a notifier callback.
Rename ccwgroup_ungroup_callback() to ccwgroup_ungroup() and make it
take ccwgroup_device * instead. The new function is now called
directly from ccwgroup_ungroup_store().
ccwgroup_notifier() chain is updated to explicitly bounce through
ccwgroup_device->ungroup_work. This also removes possible failure
from memory pressure.
Only compile-tested.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: linux390@de.ibm.com
Cc: linux-s390@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/s390/include/asm/ccwgroup.h | 1 | ||||
-rw-r--r-- | arch/s390/pci/pci_sysfs.c | 18 |
2 files changed, 9 insertions, 10 deletions
diff --git a/arch/s390/include/asm/ccwgroup.h b/arch/s390/include/asm/ccwgroup.h index 23723ce..6e670f8 100644 --- a/arch/s390/include/asm/ccwgroup.h +++ b/arch/s390/include/asm/ccwgroup.h @@ -23,6 +23,7 @@ struct ccwgroup_device { unsigned int count; struct device dev; struct ccw_device *cdev[0]; + struct work_struct ungroup_work; }; /** diff --git a/arch/s390/pci/pci_sysfs.c b/arch/s390/pci/pci_sysfs.c index cf8a12f..ab4a913 100644 --- a/arch/s390/pci/pci_sysfs.c +++ b/arch/s390/pci/pci_sysfs.c @@ -48,29 +48,27 @@ static ssize_t show_pfgid(struct device *dev, struct device_attribute *attr, } static DEVICE_ATTR(pfgid, S_IRUGO, show_pfgid, NULL); -static void recover_callback(struct device *dev) +static ssize_t store_recover(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) { struct pci_dev *pdev = to_pci_dev(dev); struct zpci_dev *zdev = get_zdev(pdev); int ret; + if (!device_remove_file_self(dev, attr)) + return count; + pci_stop_and_remove_bus_device(pdev); ret = zpci_disable_device(zdev); if (ret) - return; + return ret; ret = zpci_enable_device(zdev); if (ret) - return; + return ret; pci_rescan_bus(zdev->bus); -} - -static ssize_t store_recover(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) -{ - int rc = device_schedule_callback(dev, recover_callback); - return rc ? rc : count; + return count; } static DEVICE_ATTR(recover, S_IWUSR, NULL, store_recover); |