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Commit fb052c81 authored by Utkarsh Saxena's avatar Utkarsh Saxena Committed by Gerrit - the friendly Code Review server
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msm: ipa: Fix race condition between shared memory 



Protect the common shared wlan_comm_desc_list with
spin lock to avoid the race condition.

Change-Id: I02ef6c6b663340711e0e2f766424d642aaa8d7af
Acked-by: default avatarMohammed Javid <mjavid@qti.qualcomm.com>
Signed-off-by: default avatarUtkarsh Saxena <usaxena@codeaurora.org>
parent a9ef16da

drivers/platform/msm/ipa/ipa_v2/ipa_dp.c

+2 −0
Original line number Original line Diff line number Diff line
@@ -1934,11 +1934,13 @@ static void ipa_alloc_wlan_rx_common_cache(u32 size) 
			goto fail_dma_mapping;

			goto fail_dma_mapping;

		}

		}





		spin_lock_bh(&ipa_ctx->wc_memb.wlan_spinlock);

		list_add_tail(&rx_pkt->link,

		list_add_tail(&rx_pkt->link,

			&ipa_ctx->wc_memb.wlan_comm_desc_list);

			&ipa_ctx->wc_memb.wlan_comm_desc_list);

		rx_len_cached = ++ipa_ctx->wc_memb.wlan_comm_total_cnt;

		rx_len_cached = ++ipa_ctx->wc_memb.wlan_comm_total_cnt;





		ipa_ctx->wc_memb.wlan_comm_free_cnt++;

		ipa_ctx->wc_memb.wlan_comm_free_cnt++;

		spin_unlock_bh(&ipa_ctx->wc_memb.wlan_spinlock);





	}

	}