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Date: Tue, 12 Dec 2017 15:58:56 -0800
From: Bjorn Andersson <bjorn.andersson@...aro.org>
To: Ohad Ben-Cohen <ohad@...ery.com>,
Bjorn Andersson <bjorn.andersson@...aro.org>
Cc: linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-msm@...r.kernel.org, Chris Lew <clew@...cinc.com>,
Jeremy McNicoll <jmcnicol@...hat.com>,
Will Newton <will.newton@...il.com>
Subject: [PATCH 4/5] rpmsg: smd: Fail send on a closed channel
Move the check for a closed channel out from the tx-full loop to fail
any send request on a non-open channel.
Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
---
drivers/rpmsg/qcom_smd.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/drivers/rpmsg/qcom_smd.c b/drivers/rpmsg/qcom_smd.c
index 0993e95bf0f5..ed167ab52a68 100644
--- a/drivers/rpmsg/qcom_smd.c
+++ b/drivers/rpmsg/qcom_smd.c
@@ -743,17 +743,13 @@ static int __qcom_smd_send(struct qcom_smd_channel *channel, const void *data,
if (ret)
return ret;
- while (qcom_smd_get_tx_avail(channel) < tlen) {
+ while (qcom_smd_get_tx_avail(channel) < tlen &&
+ channel->state == SMD_CHANNEL_OPENED) {
if (!wait) {
ret = -EAGAIN;
goto out;
}
- if (channel->state != SMD_CHANNEL_OPENED) {
- ret = -EPIPE;
- goto out;
- }
-
SET_TX_CHANNEL_FLAG(channel, fBLOCKREADINTR, 0);
ret = wait_event_interruptible(channel->fblockread_event,
@@ -765,6 +761,12 @@ static int __qcom_smd_send(struct qcom_smd_channel *channel, const void *data,
SET_TX_CHANNEL_FLAG(channel, fBLOCKREADINTR, 1);
}
+ /* Fail if the channel was closed */
+ if (channel->state != SMD_CHANNEL_OPENED) {
+ ret = -EPIPE;
+ goto out;
+ }
+
SET_TX_CHANNEL_FLAG(channel, fTAIL, 0);
qcom_smd_write_fifo(channel, hdr, sizeof(hdr));
--
2.15.0
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