diff options
Diffstat (limited to 'drivers/s390/block/dasd_devmap.c')
| -rw-r--r-- | drivers/s390/block/dasd_devmap.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c index 1629b27c48ab..2f720108a7e0 100644 --- a/drivers/s390/block/dasd_devmap.c +++ b/drivers/s390/block/dasd_devmap.c @@ -16,6 +16,7 @@ #include <linux/config.h> #include <linux/ctype.h> #include <linux/init.h> +#include <linux/module.h> #include <asm/debug.h> #include <asm/uaccess.h> @@ -69,6 +70,8 @@ int dasd_autodetect = 0; /* is true, when autodetection is active */ * strings when running as a module. */ static char *dasd[256]; +module_param_array(dasd, charp, NULL, 0); + /* * Single spinlock to protect devmap structures and lists. */ @@ -715,10 +718,51 @@ dasd_discipline_show(struct device *dev, struct device_attribute *attr, char *bu static DEVICE_ATTR(discipline, 0444, dasd_discipline_show, NULL); +/* + * extended error-reporting + */ +static ssize_t +dasd_eer_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct dasd_devmap *devmap; + int eer_flag; + + devmap = dasd_find_busid(dev->bus_id); + if (!IS_ERR(devmap) && devmap->device) + eer_flag = dasd_eer_enabled(devmap->device); + else + eer_flag = 0; + return snprintf(buf, PAGE_SIZE, eer_flag ? "1\n" : "0\n"); +} + +static ssize_t +dasd_eer_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct dasd_devmap *devmap; + int rc; + + devmap = dasd_devmap_from_cdev(to_ccwdev(dev)); + if (IS_ERR(devmap)) + return PTR_ERR(devmap); + if (!devmap->device) + return count; + if (buf[0] == '1') { + rc = dasd_eer_enable(devmap->device); + if (rc) + return rc; + } else + dasd_eer_disable(devmap->device); + return count; +} + +static DEVICE_ATTR(eer_enabled, 0644, dasd_eer_show, dasd_eer_store); + static struct attribute * dasd_attrs[] = { &dev_attr_readonly.attr, &dev_attr_discipline.attr, &dev_attr_use_diag.attr, + &dev_attr_eer_enabled.attr, NULL, }; |