Validate command parsing in acpi_nfit_ctl for the clear error command.
This tests for a crash condition introduced by commit 4b27db7e26cd
"acpi, nfit: add support for the _LSI, _LSR, and _LSW label methods".

Cc: Vishal Verma <vishal.l.ve...@intel.com>
Signed-off-by: Dan Williams <dan.j.willi...@intel.com>
---
 tools/testing/nvdimm/test/nfit.c |   18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/tools/testing/nvdimm/test/nfit.c b/tools/testing/nvdimm/test/nfit.c
index edab68c2e221..7a4846d9607d 100644
--- a/tools/testing/nvdimm/test/nfit.c
+++ b/tools/testing/nvdimm/test/nfit.c
@@ -1812,6 +1812,7 @@ static int nfit_ctl_test(struct device *dev)
        unsigned long mask, cmd_size, offset;
        union {
                struct nd_cmd_get_config_size cfg_size;
+               struct nd_cmd_clear_error clear_err;
                struct nd_cmd_ars_status ars_stat;
                struct nd_cmd_ars_cap ars_cap;
                char buf[sizeof(struct nd_cmd_ars_status)
@@ -1995,6 +1996,23 @@ static int nfit_ctl_test(struct device *dev)
                return -EIO;
        }
 
+       /* test clear error */
+       cmd_size = sizeof(cmds.clear_err);
+       cmds.clear_err = (struct nd_cmd_clear_error) {
+               .length = 512,
+               .cleared = 512,
+       };
+       rc = setup_result(cmds.buf, cmd_size);
+       if (rc)
+               return rc;
+       rc = acpi_nfit_ctl(&acpi_desc->nd_desc, NULL, ND_CMD_CLEAR_ERROR,
+                       cmds.buf, cmd_size, &cmd_rc);
+       if (rc < 0 || cmd_rc >= 0) {
+               dev_dbg(dev, "%s: failed at: %d rc: %d cmd_rc: %d\n",
+                               __func__, __LINE__, rc, cmd_rc);
+               return -EIO;
+       }
+
        return 0;
 }
 

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