From b10627f358d147d9cbab0ab547997940de8a6c83 Mon Sep 17 00:00:00 2001 From: Mohammed Javid Date: Mon, 17 Jul 2017 12:03:41 +0530 Subject: [PATCH] msm: ipa3: Add spinlock to avoid deleting already deleted list There is a chance of deleting, already deleted list in ipa_cleanup_wlan_rx_common_cache API. Protect the wlan_comm_desc_list, with the spinlock to avoid this deletion. Change-Id: I10161f71b92d6d5fe06af62b65bf3d92d0d4512a Signed-off-by: Mohammed Javid --- drivers/platform/msm/ipa/ipa_v3/ipa_dp.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/platform/msm/ipa/ipa_v3/ipa_dp.c b/drivers/platform/msm/ipa/ipa_v3/ipa_dp.c index 5fe425ea7655..034b7fc45d8d 100644 --- a/drivers/platform/msm/ipa/ipa_v3/ipa_dp.c +++ b/drivers/platform/msm/ipa/ipa_v3/ipa_dp.c @@ -2093,6 +2093,8 @@ static void ipa3_cleanup_wlan_rx_common_cache(void) struct ipa3_rx_pkt_wrapper *rx_pkt; struct ipa3_rx_pkt_wrapper *tmp; + spin_lock_bh(&ipa3_ctx->wc_memb.wlan_spinlock); + list_for_each_entry_safe(rx_pkt, tmp, &ipa3_ctx->wc_memb.wlan_comm_desc_list, link) { list_del(&rx_pkt->link); @@ -2113,6 +2115,8 @@ static void ipa3_cleanup_wlan_rx_common_cache(void) IPAERR("wlan comm buff total cnt: %d\n", ipa3_ctx->wc_memb.wlan_comm_total_cnt); + spin_unlock_bh(&ipa3_ctx->wc_memb.wlan_spinlock); + } static void ipa3_alloc_wlan_rx_common_cache(u32 size) @@ -2150,11 +2154,13 @@ static void ipa3_alloc_wlan_rx_common_cache(u32 size) goto fail_dma_mapping; } + spin_lock_bh(&ipa3_ctx->wc_memb.wlan_spinlock); list_add_tail(&rx_pkt->link, &ipa3_ctx->wc_memb.wlan_comm_desc_list); rx_len_cached = ++ipa3_ctx->wc_memb.wlan_comm_total_cnt; ipa3_ctx->wc_memb.wlan_comm_free_cnt++; + spin_unlock_bh(&ipa3_ctx->wc_memb.wlan_spinlock); }