ath10k: return error when ath10k_htt_rx_amsdu_pop() fail

Return error when rx_amsdu_pop() will fail.

Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c
index a994a4f..64abc2a 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/htt_rx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_rx.c
@@ -297,6 +297,7 @@ static void ath10k_htt_rx_free_msdu_chain(struct sk_buff *skb)
        }
 }
 
+/* return: < 0 fatal error, 0 - non chained msdu, 1 chained msdu */
 static int ath10k_htt_rx_amsdu_pop(struct ath10k_htt *htt,
                                   u8 **fw_desc, int *fw_desc_len,
                                   struct sk_buff **head_msdu,
@@ -310,7 +311,7 @@ static int ath10k_htt_rx_amsdu_pop(struct ath10k_htt *htt,
 
        if (htt->rx_confused) {
                ath10k_warn("htt is confused. refusing rx\n");
-               return 0;
+               return -1;
        }
 
        msdu = *head_msdu = ath10k_htt_rx_netbuf_pop(htt);
@@ -442,6 +443,9 @@ static int ath10k_htt_rx_amsdu_pop(struct ath10k_htt *htt,
        }
        *tail_msdu = msdu;
 
+       if (*head_msdu == NULL)
+               msdu_chaining = -1;
+
        /*
         * Don't refill the ring yet.
         *
@@ -1139,11 +1143,6 @@ static bool ath10k_htt_rx_amsdu_allowed(struct ath10k_htt *htt,
                                        enum htt_rx_mpdu_status status,
                                        bool channel_set)
 {
-       if (!head) {
-               ath10k_warn("htt rx no data!\n");
-               return false;
-       }
-
        if (head->len == 0) {
                ath10k_dbg(ATH10K_DBG_HTT,
                           "htt rx dropping due to zero-len\n");
@@ -1199,6 +1198,7 @@ static void ath10k_htt_rx_handler(struct ath10k_htt *htt,
        u8 *fw_desc;
        bool channel_set, fcs_err, mic_err;
        int i, j;
+       int ret;
 
        lockdep_assert_held(&htt->rx_ring.lock);
 
@@ -1242,15 +1242,21 @@ static void ath10k_htt_rx_handler(struct ath10k_htt *htt,
 
                for (j = 0; j < mpdu_ranges[i].mpdu_count; j++) {
                        struct sk_buff *msdu_head, *msdu_tail;
-                       int msdu_chaining;
 
                        msdu_head = NULL;
                        msdu_tail = NULL;
-                       msdu_chaining = ath10k_htt_rx_amsdu_pop(htt,
-                                                        &fw_desc,
-                                                        &fw_desc_len,
-                                                        &msdu_head,
-                                                        &msdu_tail);
+                       ret = ath10k_htt_rx_amsdu_pop(htt,
+                                                     &fw_desc,
+                                                     &fw_desc_len,
+                                                     &msdu_head,
+                                                     &msdu_tail);
+
+                       if (ret < 0) {
+                               ath10k_warn("failed to pop amsdu from htt rx ring %d\n",
+                                           ret);
+                               ath10k_htt_rx_free_msdu_chain(msdu_head);
+                               continue;
+                       }
 
                        if (!ath10k_htt_rx_amsdu_allowed(htt, msdu_head,
                                                         status,
@@ -1259,8 +1265,8 @@ static void ath10k_htt_rx_handler(struct ath10k_htt *htt,
                                continue;
                        }
 
-                       if (msdu_chaining &&
-                           (ath10k_unchain_msdu(msdu_head) < 0)) {
+                       if (ret > 0 &&
+                           ath10k_unchain_msdu(msdu_head) < 0) {
                                ath10k_htt_rx_free_msdu_chain(msdu_head);
                                continue;
                        }
@@ -1308,7 +1314,7 @@ static void ath10k_htt_rx_frag_handler(struct ath10k_htt *htt,
        enum rx_msdu_decap_format fmt;
        struct htt_rx_info info = {};
        struct ieee80211_hdr *hdr;
-       int msdu_chaining;
+       int ret;
        bool tkip_mic_err;
        bool decrypt_err;
        u8 *fw_desc;
@@ -1322,19 +1328,15 @@ static void ath10k_htt_rx_frag_handler(struct ath10k_htt *htt,
        msdu_tail = NULL;
 
        spin_lock_bh(&htt->rx_ring.lock);
-       msdu_chaining = ath10k_htt_rx_amsdu_pop(htt, &fw_desc, &fw_desc_len,
-                                               &msdu_head, &msdu_tail);
+       ret = ath10k_htt_rx_amsdu_pop(htt, &fw_desc, &fw_desc_len,
+                                     &msdu_head, &msdu_tail);
        spin_unlock_bh(&htt->rx_ring.lock);
 
        ath10k_dbg(ATH10K_DBG_HTT_DUMP, "htt rx frag ahead\n");
 
-       if (!msdu_head) {
-               ath10k_warn("htt rx frag no data\n");
-               return;
-       }
-
-       if (msdu_chaining || msdu_head != msdu_tail) {
-               ath10k_warn("aggregation with fragmentation?!\n");
+       if (ret) {
+               ath10k_warn("failed to pop amsdu from httr rx ring for fragmented rx %d\n",
+                           ret);
                ath10k_htt_rx_free_msdu_chain(msdu_head);
                return;
        }