Patch "ath11k: fix thermal temperature read" has been added to the 5.12-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    ath11k: fix thermal temperature read

to the 5.12-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     ath11k-fix-thermal-temperature-read.patch
and it can be found in the queue-5.12 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 3e97ad80123de989dff3d0306b52fd07520a6cd2
Author: Pradeep Kumar Chitrapu <pradeepc@xxxxxxxxxxxxxx>
Date:   Thu Feb 18 10:27:08 2021 -0800

    ath11k: fix thermal temperature read
    
    [ Upstream commit e3de5bb7ac1a4cb262f8768924fd3ef6182b10bb ]
    
    Fix dangling pointer in thermal temperature event which causes
    incorrect temperature read.
    
    Tested-on: IPQ8074 AHB WLAN.HK.2.4.0.1-00041-QCAHKSWPL_SILICONZ-1
    
    Signed-off-by: Pradeep Kumar Chitrapu <pradeepc@xxxxxxxxxxxxxx>
    Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx>
    Link: https://lore.kernel.org/r/20210218182708.8844-1-pradeepc@xxxxxxxxxxxxxx
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/net/wireless/ath/ath11k/wmi.c b/drivers/net/wireless/ath/ath11k/wmi.c
index cccfd3bd4d27..ca5cda890d58 100644
--- a/drivers/net/wireless/ath/ath11k/wmi.c
+++ b/drivers/net/wireless/ath/ath11k/wmi.c
@@ -5417,31 +5417,6 @@ int ath11k_wmi_pull_fw_stats(struct ath11k_base *ab, struct sk_buff *skb,
 	return 0;
 }
 
-static int
-ath11k_pull_pdev_temp_ev(struct ath11k_base *ab, u8 *evt_buf,
-			 u32 len, const struct wmi_pdev_temperature_event *ev)
-{
-	const void **tb;
-	int ret;
-
-	tb = ath11k_wmi_tlv_parse_alloc(ab, evt_buf, len, GFP_ATOMIC);
-	if (IS_ERR(tb)) {
-		ret = PTR_ERR(tb);
-		ath11k_warn(ab, "failed to parse tlv: %d\n", ret);
-		return ret;
-	}
-
-	ev = tb[WMI_TAG_PDEV_TEMPERATURE_EVENT];
-	if (!ev) {
-		ath11k_warn(ab, "failed to fetch pdev temp ev");
-		kfree(tb);
-		return -EPROTO;
-	}
-
-	kfree(tb);
-	return 0;
-}
-
 size_t ath11k_wmi_fw_stats_num_vdevs(struct list_head *head)
 {
 	struct ath11k_fw_stats_vdev *i;
@@ -6849,23 +6824,37 @@ ath11k_wmi_pdev_temperature_event(struct ath11k_base *ab,
 				  struct sk_buff *skb)
 {
 	struct ath11k *ar;
-	struct wmi_pdev_temperature_event ev = {0};
+	const void **tb;
+	const struct wmi_pdev_temperature_event *ev;
+	int ret;
+
+	tb = ath11k_wmi_tlv_parse_alloc(ab, skb->data, skb->len, GFP_ATOMIC);
+	if (IS_ERR(tb)) {
+		ret = PTR_ERR(tb);
+		ath11k_warn(ab, "failed to parse tlv: %d\n", ret);
+		return;
+	}
 
-	if (ath11k_pull_pdev_temp_ev(ab, skb->data, skb->len, &ev) != 0) {
-		ath11k_warn(ab, "failed to extract pdev temperature event");
+	ev = tb[WMI_TAG_PDEV_TEMPERATURE_EVENT];
+	if (!ev) {
+		ath11k_warn(ab, "failed to fetch pdev temp ev");
+		kfree(tb);
 		return;
 	}
 
 	ath11k_dbg(ab, ATH11K_DBG_WMI,
-		   "pdev temperature ev temp %d pdev_id %d\n", ev.temp, ev.pdev_id);
+		   "pdev temperature ev temp %d pdev_id %d\n", ev->temp, ev->pdev_id);
 
-	ar = ath11k_mac_get_ar_by_pdev_id(ab, ev.pdev_id);
+	ar = ath11k_mac_get_ar_by_pdev_id(ab, ev->pdev_id);
 	if (!ar) {
-		ath11k_warn(ab, "invalid pdev id in pdev temperature ev %d", ev.pdev_id);
+		ath11k_warn(ab, "invalid pdev id in pdev temperature ev %d", ev->pdev_id);
+		kfree(tb);
 		return;
 	}
 
-	ath11k_thermal_event_temperature(ar, ev.temp);
+	ath11k_thermal_event_temperature(ar, ev->temp);
+
+	kfree(tb);
 }
 
 static void ath11k_fils_discovery_event(struct ath11k_base *ab,