From: Sebastian Ott Make the potentially long blocking wait_event's used by the cio settle mechanism interruptible. Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky --- drivers/s390/cio/css.c | 18 ++++++++++++------ drivers/s390/cio/css.h | 2 +- drivers/s390/cio/device.c | 11 ++++++++--- 3 files changed, 21 insertions(+), 10 deletions(-) Index: quilt-2.6/drivers/s390/cio/css.c =================================================================== --- quilt-2.6.orig/drivers/s390/cio/css.c 2010-02-24 09:44:23.000000000 +0100 +++ quilt-2.6/drivers/s390/cio/css.c 2010-02-24 09:44:23.000000000 +0100 @@ -1016,19 +1016,22 @@ struct css_driver *cssdrv = to_cssdriver(drv); if (cssdrv->settle) - cssdrv->settle(); + return cssdrv->settle(); return 0; } -static inline void css_complete_work(void) +static inline int css_complete_work(void) { int ret; /* Wait for the evaluation of subchannels to finish. */ - wait_event(css_eval_wq, atomic_read(&css_eval_scheduled) == 0); + ret = wait_event_interruptible(css_eval_wq, + atomic_read(&css_eval_scheduled) == 0); + if (ret) + return -EINTR; flush_workqueue(cio_work_q); /* Wait for the subchannel type specific initialization to finish */ - ret = bus_for_each_drv(&css_bus_type, NULL, NULL, css_settle); + return bus_for_each_drv(&css_bus_type, NULL, NULL, css_settle); } @@ -1049,10 +1052,13 @@ static ssize_t cio_settle_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { + int ret; + /* Handle pending CRW's. */ crw_wait_for_channel_report(); - css_complete_work(); - return count; + ret = css_complete_work(); + + return ret ? ret : count; } static const struct file_operations cio_settle_proc_fops = { Index: quilt-2.6/drivers/s390/cio/css.h =================================================================== --- quilt-2.6.orig/drivers/s390/cio/css.h 2010-02-24 09:44:23.000000000 +0100 +++ quilt-2.6/drivers/s390/cio/css.h 2010-02-24 09:44:23.000000000 +0100 @@ -95,7 +95,7 @@ int (*freeze)(struct subchannel *); int (*thaw) (struct subchannel *); int (*restore)(struct subchannel *); - void (*settle)(void); + int (*settle)(void); const char *name; }; Index: quilt-2.6/drivers/s390/cio/device.c =================================================================== --- quilt-2.6.orig/drivers/s390/cio/device.c 2010-02-24 09:44:23.000000000 +0100 +++ quilt-2.6/drivers/s390/cio/device.c 2010-02-24 09:44:23.000000000 +0100 @@ -158,11 +158,16 @@ return 0; } -static void io_subchannel_settle(void) +static int io_subchannel_settle(void) { - wait_event(ccw_device_init_wq, - atomic_read(&ccw_device_init_count) == 0); + int ret; + + ret = wait_event_interruptible(ccw_device_init_wq, + atomic_read(&ccw_device_init_count) == 0); + if (ret) + return -EINTR; flush_workqueue(cio_work_q); + return 0; } static struct css_driver io_subchannel_driver = { -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/