From 7fe5d3d382e25fbdd5026c8e0231dc5a10b57931 Mon Sep 17 00:00:00 2001 From: Furquan Shaikh Date: Sat, 13 Mar 2021 22:54:16 -0800 Subject: sar: Fix semantics of `get_wifi_sar_cbfs_filename()` Currently, if `get_wifi_sar_cbfs_filename()` returns NULL, then `get_wifi_sar_limits()` assumes that the default filename is used for CBFS SAR file. This prevents a board from supporting different models using the same firmware -- some which require SAR support and some which don't. This change updates the logic in `get_wifi_sar_limits()` to return early if filename is not provided by the mainboard. In order to maintain the same logic as before, current mainboards are updated to return WIFI_SAR_CBFS_DEFAULT_FILENAME instead of NULL in default case. Change-Id: I68b5bdd213767a3cd81fe41ace66540acd68e26a Signed-off-by: Furquan Shaikh Reviewed-on: https://review.coreboot.org/c/coreboot/+/51485 Reviewed-by: Tim Wawrzynczak Tested-by: build bot (Jenkins) --- src/vendorcode/google/chromeos/sar.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) (limited to 'src/vendorcode/google') diff --git a/src/vendorcode/google/chromeos/sar.c b/src/vendorcode/google/chromeos/sar.c index 83c1c0ca20..a38ffe270b 100644 --- a/src/vendorcode/google/chromeos/sar.c +++ b/src/vendorcode/google/chromeos/sar.c @@ -9,8 +9,6 @@ #include #include -#define WIFI_SAR_CBFS_FILENAME "wifi_sar_defaults.hex" - /* * Retrieve WiFi SAR limits data from CBFS and decode it * WiFi SAR data is expected in the format: [][WGDS] @@ -37,6 +35,12 @@ int get_wifi_sar_limits(struct wifi_sar_limits *sar_limits) char *sar_str; int ret = -1; + filename = get_wifi_sar_cbfs_filename(); + if (filename == NULL) { + printk(BIOS_DEBUG, "Filename missing for CBFS SAR file!\n"); + return ret; + } + /* * If GEO_SAR_ENABLE is not selected, SAR file does not contain * delta table settings. @@ -64,10 +68,6 @@ int get_wifi_sar_limits(struct wifi_sar_limits *sar_limits) printk(BIOS_DEBUG, "Checking CBFS for default SAR values\n"); - filename = get_wifi_sar_cbfs_filename(); - if (filename == NULL) - filename = WIFI_SAR_CBFS_FILENAME; - if (cbfs_load(filename, sar_str, sar_str_len) != sar_str_len) { printk(BIOS_ERR, "%s has bad len in CBFS\n", filename); goto done; @@ -88,5 +88,5 @@ done: __weak const char *get_wifi_sar_cbfs_filename(void) { - return WIFI_SAR_CBFS_FILENAME; + return WIFI_SAR_CBFS_DEFAULT_FILENAME; } -- cgit v1.2.3