diff options
author | Tony Lindgren <tony@atomide.com> | 2010-03-01 14:19:05 -0800 |
---|---|---|
committer | Tony Lindgren <tony@atomide.com> | 2010-03-01 14:19:05 -0800 |
commit | d702d12167a2c05a346f49aac7a311d597762495 (patch) | |
tree | baae42c299cce34d6df24b5d01f8b1d0b481bd9a /drivers/s390/block | |
parent | 9418c65f9bd861d0f7e39aab9cfb3aa6f2275d11 (diff) | |
parent | ac0f6f927db539e03e1f3f61bcd4ed57d5cde7a9 (diff) |
Merge with mainline to remove plat-omap/Kconfig conflict
Conflicts:
arch/arm/plat-omap/Kconfig
Diffstat (limited to 'drivers/s390/block')
-rw-r--r-- | drivers/s390/block/dasd.c | 53 | ||||
-rw-r--r-- | drivers/s390/block/dasd_devmap.c | 13 | ||||
-rw-r--r-- | drivers/s390/block/dasd_genhd.c | 1 | ||||
-rw-r--r-- | drivers/s390/block/dasd_int.h | 1 | ||||
-rw-r--r-- | drivers/s390/block/dasd_proc.c | 109 |
5 files changed, 94 insertions, 83 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index 5905936c7c6..4951aa82e9f 100644 --- a/drivers/s390/block/dasd.c +++ b/drivers/s390/block/dasd.c @@ -20,6 +20,7 @@ #include <linux/buffer_head.h> #include <linux/hdreg.h> #include <linux/async.h> +#include <linux/mutex.h> #include <asm/ccwdev.h> #include <asm/ebcdic.h> @@ -112,6 +113,7 @@ struct dasd_device *dasd_alloc_device(void) INIT_WORK(&device->restore_device, do_restore_device); device->state = DASD_STATE_NEW; device->target = DASD_STATE_NEW; + mutex_init(&device->state_mutex); return device; } @@ -321,8 +323,8 @@ static int dasd_state_ready_to_basic(struct dasd_device *device) device->state = DASD_STATE_READY; return rc; } - dasd_destroy_partitions(block); dasd_flush_request_queue(block); + dasd_destroy_partitions(block); block->blocks = 0; block->bp_block = 0; block->s2b_shift = 0; @@ -484,10 +486,8 @@ static void dasd_change_state(struct dasd_device *device) if (rc) device->target = device->state; - if (device->state == device->target) { + if (device->state == device->target) wake_up(&dasd_init_waitq); - dasd_put_device(device); - } /* let user-space know that the device status changed */ kobject_uevent(&device->cdev->dev.kobj, KOBJ_CHANGE); @@ -502,7 +502,9 @@ static void dasd_change_state(struct dasd_device *device) static void do_kick_device(struct work_struct *work) { struct dasd_device *device = container_of(work, struct dasd_device, kick_work); + mutex_lock(&device->state_mutex); dasd_change_state(device); + mutex_unlock(&device->state_mutex); dasd_schedule_device_bh(device); dasd_put_device(device); } @@ -539,18 +541,19 @@ void dasd_restore_device(struct dasd_device *device) void dasd_set_target_state(struct dasd_device *device, int target) { dasd_get_device(device); + mutex_lock(&device->state_mutex); /* If we are in probeonly mode stop at DASD_STATE_READY. */ if (dasd_probeonly && target > DASD_STATE_READY) target = DASD_STATE_READY; if (device->target != target) { - if (device->state == target) { + if (device->state == target) wake_up(&dasd_init_waitq); - dasd_put_device(device); - } device->target = target; } if (device->state != device->target) dasd_change_state(device); + mutex_unlock(&device->state_mutex); + dasd_put_device(device); } /* @@ -1000,12 +1003,20 @@ static void dasd_handle_killed_request(struct ccw_device *cdev, return; } - device = (struct dasd_device *) cqr->startdev; - if (device == NULL || - device != dasd_device_from_cdev_locked(cdev) || - strncmp(device->discipline->ebcname, (char *) &cqr->magic, 4)) { + device = dasd_device_from_cdev_locked(cdev); + if (IS_ERR(device)) { + DBF_EVENT_DEVID(DBF_DEBUG, cdev, "%s", + "unable to get device from cdev"); + return; + } + + if (!cqr->startdev || + device != cqr->startdev || + strncmp(cqr->startdev->discipline->ebcname, + (char *) &cqr->magic, 4)) { DBF_EVENT_DEVID(DBF_DEBUG, cdev, "%s", "invalid device in request"); + dasd_put_device(device); return; } @@ -1692,7 +1703,6 @@ int dasd_cancel_req(struct dasd_ccw_req *cqr) cqr, rc); } else { cqr->stopclk = get_clock(); - rc = 1; } break; default: /* already finished or clear pending - do nothing */ @@ -2129,9 +2139,8 @@ static void dasd_setup_queue(struct dasd_block *block) blk_queue_logical_block_size(block->request_queue, block->bp_block); max = block->base->discipline->max_blocks << block->s2b_shift; - blk_queue_max_sectors(block->request_queue, max); - blk_queue_max_phys_segments(block->request_queue, -1L); - blk_queue_max_hw_segments(block->request_queue, -1L); + blk_queue_max_hw_sectors(block->request_queue, max); + blk_queue_max_segments(block->request_queue, -1L); /* with page sized segments we can translate each segement into * one idaw/tidaw */ @@ -2170,9 +2179,13 @@ static void dasd_flush_request_queue(struct dasd_block *block) static int dasd_open(struct block_device *bdev, fmode_t mode) { struct dasd_block *block = bdev->bd_disk->private_data; - struct dasd_device *base = block->base; + struct dasd_device *base; int rc; + if (!block) + return -ENODEV; + + base = block->base; atomic_inc(&block->open_count); if (test_bit(DASD_FLAG_OFFLINE, &base->flags)) { rc = -ENODEV; @@ -2285,11 +2298,6 @@ static void dasd_generic_auto_online(void *data, async_cookie_t cookie) if (ret) pr_warning("%s: Setting the DASD online failed with rc=%d\n", dev_name(&cdev->dev), ret); - else { - struct dasd_device *device = dasd_device_from_cdev(cdev); - wait_event(dasd_init_waitq, _wait_for_device(device)); - dasd_put_device(device); - } } /* @@ -2424,6 +2432,9 @@ int dasd_generic_set_online(struct ccw_device *cdev, } else pr_debug("dasd_generic device %s found\n", dev_name(&cdev->dev)); + + wait_event(dasd_init_waitq, _wait_for_device(device)); + dasd_put_device(device); return rc; } diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c index 4cac5b54f26..d49766f3b94 100644 --- a/drivers/s390/block/dasd_devmap.c +++ b/drivers/s390/block/dasd_devmap.c @@ -874,12 +874,19 @@ dasd_discipline_show(struct device *dev, struct device_attribute *attr, ssize_t len; device = dasd_device_from_cdev(to_ccwdev(dev)); - if (!IS_ERR(device) && device->discipline) { + if (IS_ERR(device)) + goto out; + else if (!device->discipline) { + dasd_put_device(device); + goto out; + } else { len = snprintf(buf, PAGE_SIZE, "%s\n", device->discipline->name); dasd_put_device(device); - } else - len = snprintf(buf, PAGE_SIZE, "none\n"); + return len; + } +out: + len = snprintf(buf, PAGE_SIZE, "none\n"); return len; } diff --git a/drivers/s390/block/dasd_genhd.c b/drivers/s390/block/dasd_genhd.c index d3198303b93..94f92a1247f 100644 --- a/drivers/s390/block/dasd_genhd.c +++ b/drivers/s390/block/dasd_genhd.c @@ -88,6 +88,7 @@ void dasd_gendisk_free(struct dasd_block *block) if (block->gdp) { del_gendisk(block->gdp); block->gdp->queue = NULL; + block->gdp->private_data = NULL; put_disk(block->gdp); block->gdp = NULL; } diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h index e4c2143dabf..ed73ce55082 100644 --- a/drivers/s390/block/dasd_int.h +++ b/drivers/s390/block/dasd_int.h @@ -368,6 +368,7 @@ struct dasd_device { /* Device state and target state. */ int state, target; + struct mutex state_mutex; int stopped; /* device (ccw_device_start) was stopped */ /* reference count. */ diff --git a/drivers/s390/block/dasd_proc.c b/drivers/s390/block/dasd_proc.c index 71f95f54866..f13a0bdd148 100644 --- a/drivers/s390/block/dasd_proc.c +++ b/drivers/s390/block/dasd_proc.c @@ -165,51 +165,32 @@ static const struct file_operations dasd_devices_file_ops = { .release = seq_release, }; -static int -dasd_calc_metrics(char *page, char **start, off_t off, - int count, int *eof, int len) -{ - len = (len > off) ? len - off : 0; - if (len > count) - len = count; - if (len < count) - *eof = 1; - *start = page + off; - return len; -} - #ifdef CONFIG_DASD_PROFILE -static char * -dasd_statistics_array(char *str, unsigned int *array, int factor) +static void dasd_statistics_array(struct seq_file *m, unsigned int *array, int factor) { int i; for (i = 0; i < 32; i++) { - str += sprintf(str, "%7d ", array[i] / factor); + seq_printf(m, "%7d ", array[i] / factor); if (i == 15) - str += sprintf(str, "\n"); + seq_putc(m, '\n'); } - str += sprintf(str,"\n"); - return str; + seq_putc(m, '\n'); } #endif /* CONFIG_DASD_PROFILE */ -static int -dasd_statistics_read(char *page, char **start, off_t off, - int count, int *eof, void *data) +static int dasd_stats_proc_show(struct seq_file *m, void *v) { - unsigned long len; #ifdef CONFIG_DASD_PROFILE struct dasd_profile_info_t *prof; - char *str; int factor; /* check for active profiling */ if (dasd_profile_level == DASD_PROFILE_OFF) { - len = sprintf(page, "Statistics are off - they might be " + seq_printf(m, "Statistics are off - they might be " "switched on using 'echo set on > " "/proc/dasd/statistics'\n"); - return dasd_calc_metrics(page, start, off, count, eof, len); + return 0; } prof = &dasd_global_profile; @@ -217,47 +198,49 @@ dasd_statistics_read(char *page, char **start, off_t off, for (factor = 1; (prof->dasd_io_reqs / factor) > 9999999; factor *= 10); - str = page; - str += sprintf(str, "%d dasd I/O requests\n", prof->dasd_io_reqs); - str += sprintf(str, "with %u sectors(512B each)\n", + seq_printf(m, "%d dasd I/O requests\n", prof->dasd_io_reqs); + seq_printf(m, "with %u sectors(512B each)\n", prof->dasd_io_sects); - str += sprintf(str, "Scale Factor is %d\n", factor); - str += sprintf(str, + seq_printf(m, "Scale Factor is %d\n", factor); + seq_printf(m, " __<4 ___8 __16 __32 __64 _128 " " _256 _512 __1k __2k __4k __8k " " _16k _32k _64k 128k\n"); - str += sprintf(str, + seq_printf(m, " _256 _512 __1M __2M __4M __8M " " _16M _32M _64M 128M 256M 512M " " __1G __2G __4G " " _>4G\n"); - str += sprintf(str, "Histogram of sizes (512B secs)\n"); - str = dasd_statistics_array(str, prof->dasd_io_secs, factor); - str += sprintf(str, "Histogram of I/O times (microseconds)\n"); - str = dasd_statistics_array(str, prof->dasd_io_times, factor); - str += sprintf(str, "Histogram of I/O times per sector\n"); - str = dasd_statistics_array(str, prof->dasd_io_timps, factor); - str += sprintf(str, "Histogram of I/O time till ssch\n"); - str = dasd_statistics_array(str, prof->dasd_io_time1, factor); - str += sprintf(str, "Histogram of I/O time between ssch and irq\n"); - str = dasd_statistics_array(str, prof->dasd_io_time2, factor); - str += sprintf(str, "Histogram of I/O time between ssch " + seq_printf(m, "Histogram of sizes (512B secs)\n"); + dasd_statistics_array(m, prof->dasd_io_secs, factor); + seq_printf(m, "Histogram of I/O times (microseconds)\n"); + dasd_statistics_array(m, prof->dasd_io_times, factor); + seq_printf(m, "Histogram of I/O times per sector\n"); + dasd_statistics_array(m, prof->dasd_io_timps, factor); + seq_printf(m, "Histogram of I/O time till ssch\n"); + dasd_statistics_array(m, prof->dasd_io_time1, factor); + seq_printf(m, "Histogram of I/O time between ssch and irq\n"); + dasd_statistics_array(m, prof->dasd_io_time2, factor); + seq_printf(m, "Histogram of I/O time between ssch " "and irq per sector\n"); - str = dasd_statistics_array(str, prof->dasd_io_time2ps, factor); - str += sprintf(str, "Histogram of I/O time between irq and end\n"); - str = dasd_statistics_array(str, prof->dasd_io_time3, factor); - str += sprintf(str, "# of req in chanq at enqueuing (1..32) \n"); - str = dasd_statistics_array(str, prof->dasd_io_nr_req, factor); - len = str - page; + dasd_statistics_array(m, prof->dasd_io_time2ps, factor); + seq_printf(m, "Histogram of I/O time between irq and end\n"); + dasd_statistics_array(m, prof->dasd_io_time3, factor); + seq_printf(m, "# of req in chanq at enqueuing (1..32) \n"); + dasd_statistics_array(m, prof->dasd_io_nr_req, factor); #else - len = sprintf(page, "Statistics are not activated in this kernel\n"); + seq_printf(m, "Statistics are not activated in this kernel\n"); #endif - return dasd_calc_metrics(page, start, off, count, eof, len); + return 0; } -static int -dasd_statistics_write(struct file *file, const char __user *user_buf, - unsigned long user_len, void *data) +static int dasd_stats_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, dasd_stats_proc_show, NULL); +} + +static ssize_t dasd_stats_proc_write(struct file *file, + const char __user *user_buf, size_t user_len, loff_t *pos) { #ifdef CONFIG_DASD_PROFILE char *buffer, *str; @@ -308,6 +291,15 @@ out_error: #endif /* CONFIG_DASD_PROFILE */ } +static const struct file_operations dasd_stats_proc_fops = { + .owner = THIS_MODULE, + .open = dasd_stats_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .write = dasd_stats_proc_write, +}; + /* * Create dasd proc-fs entries. * In case creation failed, cleanup and return -ENOENT. @@ -324,13 +316,12 @@ dasd_proc_init(void) &dasd_devices_file_ops); if (!dasd_devices_entry) goto out_nodevices; - dasd_statistics_entry = create_proc_entry("statistics", - S_IFREG | S_IRUGO | S_IWUSR, - dasd_proc_root_entry); + dasd_statistics_entry = proc_create("statistics", + S_IFREG | S_IRUGO | S_IWUSR, + dasd_proc_root_entry, + &dasd_stats_proc_fops); if (!dasd_statistics_entry) goto out_nostatistics; - dasd_statistics_entry->read_proc = dasd_statistics_read; - dasd_statistics_entry->write_proc = dasd_statistics_write; return 0; out_nostatistics: |