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authorDan Williams <dan.j.williams@intel.com>2016-02-23 05:50:31 (GMT)
committerDan Williams <dan.j.williams@intel.com>2016-03-05 20:24:06 (GMT)
commit87bf572e19a092cc9cc77d5a00d543a2b628c142 (patch)
treeae275e80641400bccfbf39c168dbfc5178b44159 /drivers/nvdimm
parent1cf03c00e7c17d3cf13a267dac83b3162a16ba8c (diff)
downloadlinux-87bf572e19a092cc9cc77d5a00d543a2b628c142.tar.xz
nfit: disable userspace initiated ars during scrub
While the nfit driver is issuing address range scrub commands and reaping the results do not permit an ars_start command issued from userspace. The scrub thread assumes that all ars completions are for scrubs initiated by platform firmware at boot, or by the nfit driver. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm')
-rw-r--r--drivers/nvdimm/bus.c18
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c
index 2508251..228c0e9 100644
--- a/drivers/nvdimm/bus.c
+++ b/drivers/nvdimm/bus.c
@@ -490,16 +490,24 @@ void wait_nvdimm_bus_probe_idle(struct device *dev)
}
/* set_config requires an idle interleave set */
-static int nd_cmd_clear_to_send(struct nvdimm *nvdimm, unsigned int cmd)
+static int nd_cmd_clear_to_send(struct nvdimm_bus *nvdimm_bus,
+ struct nvdimm *nvdimm, unsigned int cmd)
{
- struct nvdimm_bus *nvdimm_bus;
+ struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc;
+
+ /* ask the bus provider if it would like to block this request */
+ if (nd_desc->clear_to_send) {
+ int rc = nd_desc->clear_to_send(nd_desc, nvdimm, cmd);
+
+ if (rc)
+ return rc;
+ }
if (!nvdimm || cmd != ND_CMD_SET_CONFIG_DATA)
return 0;
- nvdimm_bus = walk_to_nvdimm_bus(&nvdimm->dev);
+ /* prevent label manipulation while the kernel owns label updates */
wait_nvdimm_bus_probe_idle(&nvdimm_bus->dev);
-
if (atomic_read(&nvdimm->busy))
return -EBUSY;
return 0;
@@ -609,7 +617,7 @@ static int __nd_ioctl(struct nvdimm_bus *nvdimm_bus, struct nvdimm *nvdimm,
}
nvdimm_bus_lock(&nvdimm_bus->dev);
- rc = nd_cmd_clear_to_send(nvdimm, cmd);
+ rc = nd_cmd_clear_to_send(nvdimm_bus, nvdimm, cmd);
if (rc)
goto out_unlock;