msm: ipa3: Fix to recycle buffers

Make a change to protect cleaning up of recycle buffers as there can be a race between clean up and recycling. Change-Id: I7cc4f40ea87fb0a2b9ce76ff24b47c5d8a02d94f Signed-off-by: Chaitanya Pratapa <[email protected]>
sonyxperiadev · Jul 2, 2019 · a92c2f5 · a92c2f5
1 parent 09920fa
commit a92c2f5
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/drivers/platform/msm/ipa/ipa_v3/ipa_dp.c b/drivers/platform/msm/ipa/ipa_v3/ipa_dp.c
@@ -2397,6 +2397,7 @@ static void ipa3_cleanup_rx(struct ipa3_sys_context *sys)
 		kmem_cache_free(ipa3_ctx->rx_pkt_wrapper_cache, rx_pkt);
 	}
 
+	spin_lock_bh(&sys->spinlock);
 	list_for_each_entry_safe(rx_pkt, r,
 				 &sys->rcycl_list, link) {
 		list_del(&rx_pkt->link);
@@ -2405,6 +2406,7 @@ static void ipa3_cleanup_rx(struct ipa3_sys_context *sys)
 		sys->free_skb(rx_pkt->data.skb);
 		kmem_cache_free(ipa3_ctx->rx_pkt_wrapper_cache, rx_pkt);
 	}
+	spin_unlock_bh(&sys->spinlock);
 
 	if (sys->repl) {
 		head = atomic_read(&sys->repl->head_idx);