change otg to host mode

hc

2024-05-11 04dd17822334871b23ea2862f7798fb0e0007777

 kernel/arch/powerpc/perf/hv-24x7.c
..
..
@@ -79,9 +79,8 @@
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  */
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 void read_24x7_sys_info(void)
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 {
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-	int call_status, len, ntypes;
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-
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-	spin_lock(&rtas_data_buf_lock);
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+	const s32 token = rtas_token("ibm,get-system-parameter");
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+	int call_status;
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 	/*
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 	 * Making system parameter: chips and sockets and cores per chip
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@@ -91,32 +90,27 @@
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 	phys_chipspersocket = 1;
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 	phys_coresperchip = 1;
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-	call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
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-				NULL,
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-				PROCESSOR_MODULE_INFO,
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-				__pa(rtas_data_buf),
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-				RTAS_DATA_BUF_SIZE);
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+	do {
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+		spin_lock(&rtas_data_buf_lock);
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+		call_status = rtas_call(token, 3, 1, NULL, PROCESSOR_MODULE_INFO,
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+					__pa(rtas_data_buf), RTAS_DATA_BUF_SIZE);
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+		if (call_status == 0) {
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+			int ntypes = be16_to_cpup((__be16 *)&rtas_data_buf[2]);
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+			int len = be16_to_cpup((__be16 *)&rtas_data_buf[0]);
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+
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+			if (len >= 8 && ntypes != 0) {
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+				phys_sockets = be16_to_cpup((__be16 *)&rtas_data_buf[4]);
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+				phys_chipspersocket = be16_to_cpup((__be16 *)&rtas_data_buf[6]);
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+				phys_coresperchip = be16_to_cpup((__be16 *)&rtas_data_buf[8]);
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+			}
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+		}
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+		spin_unlock(&rtas_data_buf_lock);
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+	} while (rtas_busy_delay(call_status));
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 	if (call_status != 0) {
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 		pr_err("Error calling get-system-parameter %d\n",
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 		       call_status);
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-	} else {
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-		len = be16_to_cpup((__be16 *)&rtas_data_buf[0]);
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-		if (len < 8)
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-			goto out;
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-
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-		ntypes = be16_to_cpup((__be16 *)&rtas_data_buf[2]);
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-
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-		if (!ntypes)
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-			goto out;
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-
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-		phys_sockets = be16_to_cpup((__be16 *)&rtas_data_buf[4]);
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-		phys_chipspersocket = be16_to_cpup((__be16 *)&rtas_data_buf[6]);
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-		phys_coresperchip = be16_to_cpup((__be16 *)&rtas_data_buf[8]);
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 	}
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-
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-out:
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-	spin_unlock(&rtas_data_buf_lock);
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 }
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 /* Domains for which more than one result element are returned for each event. */
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@@ -1416,7 +1410,7 @@
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 	}
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 	domain = event_get_domain(event);
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-	if (domain >= HV_PERF_DOMAIN_MAX) {
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+	if (domain  == 0 || domain >= HV_PERF_DOMAIN_MAX) {
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 		pr_devel("invalid domain %d\n", domain);
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 		return -EINVAL;
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 	}