From 0b60f9ead5d4816e7e3d6e28f4a0d22d4a1b2513 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Mon, 3 Feb 2014 14:03:04 -0500 Subject: 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 Cc: Martin Schwidefsky Cc: Heiko Carstens Cc: linux390@de.ibm.com Cc: linux-s390@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/s390/block/dcssblk.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) (limited to 'drivers/s390/block/dcssblk.c') diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c index ebf41e228e55..ee0e85abe1fd 100644 --- a/drivers/s390/block/dcssblk.c +++ b/drivers/s390/block/dcssblk.c @@ -304,12 +304,6 @@ dcssblk_load_segment(char *name, struct segment_info **seg_info) return rc; } -static void dcssblk_unregister_callback(struct device *dev) -{ - device_unregister(dev); - put_device(dev); -} - /* * device attribute for switching shared/nonshared (exclusive) * operation (show + store) @@ -397,7 +391,13 @@ removeseg: blk_cleanup_queue(dev_info->dcssblk_queue); dev_info->gd->queue = NULL; put_disk(dev_info->gd); - rc = device_schedule_callback(dev, dcssblk_unregister_callback); + up_write(&dcssblk_devices_sem); + + if (device_remove_file_self(dev, attr)) { + device_unregister(dev); + put_device(dev); + } + return rc; out: up_write(&dcssblk_devices_sem); return rc; -- cgit v1.2.3