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Commit 689a56d2 authored by Ravi Gummadidala's avatar Ravi Gummadidala
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msm: ipa: fix for data path stall 



A previous optimization to aggregate the replenish trigger
introduced a bug in the fifo empty recovery procedure that
can cause a permanent stall. This commit fixes that bug.
Also lower the trigger threshold to 1/8 to make the fifo
empty condition less likely.

Change-Id: I10bf227826328351ee845077e4ceec47b060ce41
Signed-off-by: default avatarRavi Gummadidala <rgummadi@codeaurora.org>
parent c82c8a5b

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

+2 −1
Original line number Diff line number Diff line
@@ -1797,6 +1797,7 @@ static void ipa_fast_replenish_rx_cache(struct ipa_sys_context *sys) 
			else

				WARN_ON(1);

		}

		sys->repl_trig_cnt = 0;

		queue_delayed_work(sys->wq, &sys->replenish_rx_work,

			msecs_to_jiffies(1));

	}
@@ -2681,7 +2682,7 @@ static int ipa_assign_policy(struct ipa_sys_connect_params *in, 
						IPA_GENERIC_AGGR_PKT_LIMIT;

					}

				}

				sys->repl_trig_thresh = sys->rx_pool_sz / 4;

				sys->repl_trig_thresh = sys->rx_pool_sz / 8;

				if (nr_cpu_ids > 1)

					sys->repl_hdlr =

						ipa_fast_replenish_rx_cache;