Commit ef4b3f6e authored May 31, 2017 by Arun Kumar Neelakantam Committed by Chris Lew Jun 08, 2017

soc: qcom: glink_smem_native_xprt: recovery from SSR in tasklet only



Checking RX_FIFO allocation status from deferred thread also causes
in_ssr flag reset and reading stale data from FIFO, If the deferred
thread schedules after the execution of ssr() function.

Check RX_FIFO status only after receiving the interrupt from remote
side which happens after remote sub-system recover from SSR.

CRs-Fixed: 2054480
Change-Id: I39269f6b2e1f1cb9aecd25fa40e73c2d6f12dbd5
Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>

parent 7cff2be1

drivers/soc/qcom/glink_smem_native_xprt.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -869,7 +869,7 @@ static void __rx_worker(struct edge_info *einfo, bool atomic_ctx)

		rcu_id = srcu_read_lock(&einfo->use_ref);

		if (unlikely(!einfo->rx_fifo)) {
		if (unlikely(!einfo->rx_fifo) && atomic_ctx) {
		if (!get_rx_fifo(einfo)) {
		srcu_read_unlock(&einfo->use_ref, rcu_id);
		return;