From cc9b6012d34b8cb130d4269a79032b75a84bf46e Mon Sep 17 00:00:00 2001
From: Mordechay Goodstein <mordechay.goodstein@intel.com>
Date: Fri, 24 Apr 2020 18:48:09 +0300
Subject: [PATCH] iwlwifi: yoyo: use hweight_long instead of bit manipulating
Git-commit: cc9b6012d34b8cb130d4269a79032b75a84bf46e
Patch-mainline: v5.8-rc1
References: jsc#SLE-13430

Also we can only have one fid1 or fid2 set so no need to check
if the fid2 is set in case fid1 wasn't set.

Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20200424182644.34e74106bad3.Ic3a9f0a35fed47b02ebcd27c2dc2b50cb1e56bdf@changeid
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/net/wireless/intel/iwlwifi/fw/dbg.c | 25 +++++++++++++------------
 1 file changed, 13 insertions(+), 12 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
index 914f0eb07d52..37c8b6cc2ec7 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
@@ -1367,28 +1367,30 @@ static void iwl_ini_get_rxf_data(struct iwl_fw_runtime *fwrt,
 	struct iwl_fw_ini_region_tlv *reg = (void *)reg_data->reg_tlv->data;
 	u32 fid1 = le32_to_cpu(reg->fifos.fid[0]);
 	u32 fid2 = le32_to_cpu(reg->fifos.fid[1]);
-	u32 fifo_idx;
+	u8 fifo_idx;
 
 	if (!data)
 		return;
 
+	/* make sure only one bit is set in only one fid */
+	if (WARN_ONCE(hweight_long(fid1) + hweight_long(fid2) != 1,
+		      "fid1=%x, fid2=%x\n", fid1, fid2))
+		return;
+
 	memset(data, 0, sizeof(*data));
 
-	if (WARN_ON_ONCE((fid1 && fid2) || (!fid1 && !fid2)))
-		return;
+	if (fid1) {
+		fifo_idx = ffs(fid1) - 1;
+		if (WARN_ONCE(fifo_idx >= MAX_NUM_LMAC, "fifo_idx=%d\n",
+			      fifo_idx))
+			return;
 
-	fifo_idx = ffs(fid1) - 1;
-	if (fid1 && !WARN_ON_ONCE((~BIT(fifo_idx) & fid1) ||
-				  fifo_idx >= MAX_NUM_LMAC)) {
 		data->size = fwrt->smem_cfg.lmac[fifo_idx].rxfifo1_size;
 		data->fifo_num = fifo_idx;
-		return;
-	}
-
-	fifo_idx = ffs(fid2) - 1;
-	if (fid2 && !WARN_ON_ONCE(~BIT(fifo_idx) & fid2)) {
+	} else {
 		u8 max_idx;
 
+		fifo_idx = ffs(fid2) - 1;
 		if (iwl_fw_lookup_notif_ver(fwrt->fw, SYSTEM_GROUP,
 					    SHARED_MEM_CFG_CMD, 0) <= 3)
 			max_idx = 0;
@@ -1416,7 +1418,6 @@ static void iwl_ini_get_rxf_data(struct iwl_fw_runtime *fwrt,
 						     RXF2C_DIFF_FROM_PREV);
 			break;
 		}
-		return;
 	}
 }
 
-- 
2.16.4