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authorGerald Schaefer <gerald.schaefer@de.ibm.com>2015-01-16 18:29:04 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2015-01-22 12:16:04 +0100
commit5be6fdc090e156bc67b63310b65f4f54523e7b6c (patch)
treecdc9cf51dd1b3f73185a82a6a61ea542f56051b9 /drivers/s390/block/dcssblk.c
parents390: add SMT support (diff)
downloadlinux-5be6fdc090e156bc67b63310b65f4f54523e7b6c.tar.xz
linux-5be6fdc090e156bc67b63310b65f4f54523e7b6c.zip
dcssblk: issue warning when trying to save SN/EN type DCSS
The content of a DCSS of type SN or EN cannot be saved. Issue a warning when trying to save such a DCSS. Depending on the setup, this may be a user error or intended behaviour e.g. with a multi-DCSS device. Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/block/dcssblk.c')
-rw-r--r--drivers/s390/block/dcssblk.c15
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index b550c8c8d010..7f900229404d 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -438,7 +438,13 @@ dcssblk_save_store(struct device *dev, struct device_attribute *attr, const char
pr_info("All DCSSs that map to device %s are "
"saved\n", dev_info->segment_name);
list_for_each_entry(entry, &dev_info->seg_list, lh) {
- segment_save(entry->segment_name);
+ if (entry->segment_type == SEG_TYPE_EN ||
+ entry->segment_type == SEG_TYPE_SN)
+ pr_warn("DCSS %s is of type SN or EN"
+ " and cannot be saved\n",
+ entry->segment_name);
+ else
+ segment_save(entry->segment_name);
}
} else {
// device is busy => we save it when it becomes
@@ -797,7 +803,12 @@ dcssblk_release(struct gendisk *disk, fmode_t mode)
pr_info("Device %s has become idle and is being saved "
"now\n", dev_info->segment_name);
list_for_each_entry(entry, &dev_info->seg_list, lh) {
- segment_save(entry->segment_name);
+ if (entry->segment_type == SEG_TYPE_EN ||
+ entry->segment_type == SEG_TYPE_SN)
+ pr_warn("DCSS %s is of type SN or EN and cannot"
+ " be saved\n", entry->segment_name);
+ else
+ segment_save(entry->segment_name);
}
dev_info->save_pending = 0;
}