From c5b42c674ad88643c8a7d31611114bda62425fcf Mon Sep 17 00:00:00 2001
From: Luca Coelho <luciano.coelho@intel.com>
Date: Thu, 19 Aug 2021 18:40:26 +0300
Subject: [PATCH] iwlwifi: acpi: fill in WGDS table with defaults
Git-commit: c5b42c674ad88643c8a7d31611114bda62425fcf
Patch-mainline: v5.15-rc1
References: jsc#SLE-19360

The tables we store are the larger of all the revisions, so we need to
fill in the values that we don't get from ACPI when using older
revisions.

Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210819183728.01b12461a30b.I08d1f9154f26eca25c44616efdb5223bcc1935f3@changeid
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/net/wireless/intel/iwlwifi/fw/acpi.c | 42 ++++++++++++++------
 1 file changed, 29 insertions(+), 13 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/acpi.c b/drivers/net/wireless/intel/iwlwifi/fw/acpi.c
index de1e9271dcd2..37da836a8c08 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/acpi.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/acpi.c
@@ -745,20 +745,18 @@ int iwl_sar_get_wgds_table(struct iwl_fw_runtime *fwrt)
 read_table:
 	fwrt->geo_rev = tbl_rev;
 	for (i = 0; i < ACPI_NUM_GEO_PROFILES; i++) {
-		for (j = 0; j < num_bands; j++) {
+		for (j = 0; j < ACPI_GEO_NUM_BANDS_REV2; j++) {
 			union acpi_object *entry;
 
-			entry = &wifi_pkg->package.elements[idx++];
-			if (entry->type != ACPI_TYPE_INTEGER ||
-			    entry->integer.value > U8_MAX) {
-				ret = -EINVAL;
-				goto out_free;
-			}
-
-			fwrt->geo_profiles[i].bands[j].max =
-				entry->integer.value;
-
-			for (k = 0; k < ACPI_GEO_NUM_CHAINS; k++) {
+			/*
+			 * num_bands is either 2 or 3, if it's only 2 then
+			 * fill the third band (6 GHz) with the values from
+			 * 5 GHz (second band)
+			 */
+			if (j >= num_bands) {
+				fwrt->geo_profiles[i].bands[j].max =
+					fwrt->geo_profiles[i].bands[1].max;
+			} else {
 				entry = &wifi_pkg->package.elements[idx++];
 				if (entry->type != ACPI_TYPE_INTEGER ||
 				    entry->integer.value > U8_MAX) {
@@ -766,9 +764,27 @@ int iwl_sar_get_wgds_table(struct iwl_fw_runtime *fwrt)
 					goto out_free;
 				}
 
-				fwrt->geo_profiles[i].bands[j].chains[k] =
+				fwrt->geo_profiles[i].bands[j].max =
 					entry->integer.value;
 			}
+
+			for (k = 0; k < ACPI_GEO_NUM_CHAINS; k++) {
+				/* same here as above */
+				if (j >= num_bands) {
+					fwrt->geo_profiles[i].bands[j].chains[k] =
+						fwrt->geo_profiles[i].bands[1].chains[k];
+				} else {
+					entry = &wifi_pkg->package.elements[idx++];
+					if (entry->type != ACPI_TYPE_INTEGER ||
+					    entry->integer.value > U8_MAX) {
+						ret = -EINVAL;
+						goto out_free;
+					}
+
+					fwrt->geo_profiles[i].bands[j].chains[k] =
+						entry->integer.value;
+				}
+			}
 		}
 	}
 
-- 
2.26.2