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zcryptstats: Fix handling of partial results with many domains

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When many domains per card are available, then the results of the SCDMD
CHSC call may not fit into the output area, and a partial result is
returned. The further results must be retrieved with another CHSC call.

Fix the code to pass the correct next-domain to the subsequent CHSC call
of a partial response. Otherwise the same set of domains 1 to n are
retrieved again, resulting in an infinite loop, because this will always
produce a partial result.

Signed-off-by: Ingo Franzki <ifranzki@linux.ibm.com>
Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Ingo Franzki
2020-11-11 10:22:30 +01:00
committed by Jan Höppner
parent 7e832da790
commit cf2311f1f1
1 changed files with 8 additions and 6 deletions
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14
zconf/zcrypt/zcryptstats.c
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@@ -1178,8 +1178,14 @@ static int get_apqn_measurement_data(uint8_t card)
scdmd_area.request.header.code = 0x102d;
scdmd_area.request.header.length =
sizeof(struct chsc_scdmd_request);
scdmd_area.request.first_drid.ap_index = card;
scdmd_area.request.first_drid.domain_index = g.min_domain;
if (scdmd_area.response.p) {
scdmd_area.request.first_drid =
scdmd_area.response.crid;
} else {
scdmd_area.request.first_drid.ap_index = card;
scdmd_area.request.first_drid.domain_index =
g.min_domain;
}
scdmd_area.request.last_drid.ap_index = card;
scdmd_area.request.last_drid.domain_index = g.max_domain;
scdmd_area.request.s = 1;
@@ -1217,10 +1223,6 @@ static int get_apqn_measurement_data(uint8_t card)
rc = process_apqn_measurement_data(&scdmd_area);
if (rc != 0)
break;
if (scdmd_area.response.p)
scdmd_area.request.first_drid =
scdmd_area.response.crid;
} while (scdmd_area.response.p);
return rc;